2010 Cadillac Truck SRX AWD V6-3.0L Page 304

2010 Cadillac Truck SRX AWD V6-3.0L Page 304

瀚慖f the E4G headlamp-left low beam and the E4H headlamp-right low beam do not activate, test the control circuit for a short to ground or

an open/high resistance.

6. Connect a test lamp between the B+ circuit terminal 86 and the control circuit terminal 85.

7. Ignition ON, command the Low Beam Lamps ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between

the commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.

瀚慖f the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace

the K9 BCM.

8. If all circuits test normal, test or replace the KR49 headlamp low beam relay.

Component Testing

Relay Test

1. Ignition OFF, disconnect the KR49 headlamp low beam relay.

2. Test for 60-180 ohm between terminals 85 and 86.

瀚慖f not within the specified range, replace the KR49 headlamp low beam relay.

3. Test for infinite resistance between the following terminals:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

瀚慖f not the specified value, replace the KR49 headlamp low beam relay.

4. Install a 15A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for

less than 2 ohm between terminals 30 and 87.

瀚慖f greater than the specified range, replace the KR49 headlamp low beam relay.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay

Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power

Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))

* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming

B260A

DTC B260A

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC B260A 00

- Backlight and Display Dimming Request Circuit Malfunction

Diagnostic Fault Information

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1277

瀚慖f the circuits test normal, replace the K20 ECM.

Note: Testing for the following steps is performed on the fuel injector side of the multi-way harness connector. It may be necessary to

remove the intake manifold to isolate the condition.

4. Ignition OFF, measure the resistance between the appropriate high voltage supply circuit and ground. The DMM should display OL ohm.

瀚慖f less than the specified range, test the high voltage supply circuit and the high voltage control circuit for a short to ground. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).

5. Test for 2-3 ohm between the appropriate high voltage supply circuit and high voltage control circuit.

瀚慖f less than the specified range, test for a short between the high voltage supply circuit and high voltage control circuit. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).

瀚慖f greater than the specified range, test the high voltage supply circuit and high voltage control circuit for an open/high resistance. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector.

Component Testing

* Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection

)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and

Inspection)

* Fuel Injector Balance Test (LAU) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Fuel Injector Balance Test)Fuel Injector Balance Test (LF1, LFW) (See: Powertrain Management/Computers and

Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector Balance Test)

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 1)

* Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P0206

DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277

(LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0201

- Cylinder 1 Injector Control Circuit

DTC P0202

- Cylinder 2 Injector Control Circuit

DTC P0203

- Cylinder 3 Injector Control Circuit

DTC P0204

- Cylinder 4 Injector Control Circuit

DTC P0205

- Cylinder 5 Injector Control Circuit

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2010 Cadillac Truck SRX AWD V6-3.0L Page 197

* Impact sensor wiring harness connector

* SDM wiring harness connector

Note: The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an

audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly. Replace

any CPA that is damaged or missing.

If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct the

high resistance condition due to terminal fretting corrosion.

1. Verify that DTC B0083-B0088 symptom byte 39 or 71 is not set as current.

瀚慖f symptom byte 39 or 71 is set as current, replace the appropriate B59 front impact sensor or B63 side impact sensor.

2. Verify that the SDM calibrations match the VIN data, software part number, and calibration part number.

瀚慖f not the correct data or part number, program the SDM.

3. Verify the correct impact sensors have the correct part numbers, matching the label part numbers with the parts book.

瀚慖f the part numbers do not match, replace the incorrect B59 front impact sensor or B63 side impact sensor

4. Verify that DTC B0083-B0088 symptom byte 01, 02, 04, 05, or 0C is not set as current.

瀚慖f symptom byte 01, 02, 04, 05, or 0C is set as current, refer to Circuit/System Testing.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate B59 front impact sensor or B63 side impact sensor.

2. Ignition OFF, disconnect the scan tool, wait 120 seconds, test for less than 10 ohm between the low reference circuit terminal 2 and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K36

SDM.

3. Test for greater than 50k ohm between the signal circuit terminal 1 and ground.

瀚慖f less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K36 SDM.

4. Disconnect the harness connector at the SDM.

5. Test for less than 1 ohm between the impact sensor signal circuit terminal 1 and the SDM terminal listed below.

* B59 Left front impact sensor terminal 23 X2

* B59 Right front impact sensor terminal 26 X2

* B63 Left front side impact sensor terminal 19 X2

* B63 Right front side impact sensor terminal 22 X2

* B63 Left rear side impact sensor terminal 27 X2

* B63 Right rear side impact sensor terminal 30 X2

瀚慖f greater than the specified range, test the circuit for an open/high resistance.

6. If all circuits test normal, replace the B59 front impact sensor or B63 side impact sensor. The DTC should not be set as current.

瀚慖f the DTC resets as current, replace the K36 SDM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Inflatable Restraint Side Impact Sensor Replacement (See: Restraints and Safety Systems/Air Bag Systems/Impact Sensor/Service and

Repair/Inflatable Restraint Side Impact Sensor Replacement)

* Front End Inflatable Restraint Discriminating Sensor Replacement (See: Restraints and Safety Systems/Air Bag Systems/Impact

Sensor/Service and Repair/Front End Inflatable Restraint Discriminating Sensor Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for SDM replacement, setup, and programming

B096A

DTC B096A

Diagnostic Instructions

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2010 Cadillac Truck SRX AWD V6-3.0L Page 401

B0954 06, B0955 06, B0956 06, or B0957 06

The parking assist control module has detected the voltage at the sensor circuit is less than 0.5 V.

B0954 08, B0955 08, B0956 08, or B0957 08

The parking assist control module has received an invalid signal.

B0954 21, B0955 21, B0956 21, or B0957 21

The object sensor determines no change in the position of an object while the vehicle is in motion.

B0954 3A, B0955 3A, B0956 3A, or B0957 3A

The parking assist control module determines the wrong sensor type is installed.

Action Taken When the DTC Sets

* The parking assist is disabled.

* The driver information center displays SERVICE PARK ASSIST.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Reference Information

Schematic Reference

Object Detection Schematics (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Diagrams/Electrical

Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Object Detection Description and Operation (UVC) (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist

Systems/Description and Operation/Object Detection (UVC))Object Detection Description and Operation (UD5) (See: Accessories and Optional

Equipment/Collision Avoidance and Parking Assist Systems/Description and Operation/Object Detection Description and Operation (UD5))

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Verify that DTC B1405 is not present.

瀚慖f DTC is present, refer to DTC B1405 (See: B Code Charts/B1405/Object Detection).

2. Verify that DTC B0954 01, B0955 01, B0956 01 or B0957 01 is not present.

瀚慖f DTC is present, check the appropriate sensor for contamination with mud, ice or snow. If no contamination is diagnosed, refer to

Circuit/System Testing.

3. Verify that DTC B0954 21, B0955 21, B0956 21 or B0957 21 is not present.

瀚慖f DTC is present, check the respective sensor for contamination by mud, ice or snow. If no contamination is diagnosed, replace the

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1471

normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.

5. Engine running, observe the Ignition Coil 1-6 Control Circuit Low Voltage Test Status on the scan tool. Test Status should be Ok or Not

Run.

瀚慖f test status is Malfunction test for open or short to ground.

6. Engine running, observe the Ignition Coil 1-6 Control Circuit Open Test Status on the scan tool. Test Status should be Ok or Not Run.

瀚慖f test status is Malfunction test for open circuit.

7. Engine running, observe the Ignition Coil 1 6 Control Circuit High Voltage Test Status on the scan tool. Test Status should be Ok or Not

Run.

瀚慖f test status is Malfunction test for short to voltage.

8. If all circuits test normal, test or replace the T8 ignition coil.

Repair Instructions

* T8 Ignition Coil Replacement - Bank 1 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 1)

* T8 Ignition Coil Replacement - Bank 2 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

Repair Verification

Note: An ignition control circuit fault condition will result in an engine misfire, and under certain driving conditions could possibly overheat the

3-way catalytic converter.

1. Install any components or connectors that have been removed or replaced during diagnosis.

2. Perform any adjustment, programming, or setup procedures that are required when a component or module is removed or replaced.

3. Clear the DTCs.

4. Turn the ignition OFF for 60 s.

5. If the repair is related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in

order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle

(See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) and perform the appropriate diagnostic

procedure.

6. To verify that the performance of the catalytic converter has not been affected by the condition that set this DTC, perform the Repair

Verification for DTC P0420 or P0430.

P0365

DTC P0340, P0345, P0365, or P0390 (LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0340

- Intake Camshaft Position Sensor Circuit Bank 1

DTC P0345

- Intake Camshaft Position Sensor Circuit Bank 2

DTC P0365

- Exhaust Camshaft Position Sensor Circuit Bank 1

DTC P0390

- Exhaust Camshaft Position Sensor Circuit Bank 2

Diagnostic Fault Information

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1062

DTC P0053

- HO2S Heater Resistance Bank 1 Sensor 1

DTC P0054

- HO2S Heater Resistance Bank 1 Sensor 2

DTC P0056

- HO2S Heater Control Circuit Bank 2 Sensor 2

DTC P0059

- HO2S Heater Resistance Bank 2 Sensor 1

DTC P0060

- HO2S Heater Resistance Bank 2 Sensor 2

DTC P0135

- HO2S Heater Performance Bank 1 Sensor 1

DTC P0141

- HO2S Heater Performance Bank 1 Sensor 2

DTC P0155

- HO2S Heater Performance Bank 2 Sensor 1

DTC P0161

- HO2S Heater Performance Bank 2 Sensor 2

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

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2010 Cadillac Truck SRX AWD V6-3.0L Page 548

瀚慖f less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K73

telematics communication interface control module.

瀚慖f greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the K73 telematics

communication interface control module.

4. If all circuit test normal, replace the B24 cellular phone microphone.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Mobile Telephone Microphone Replacement (See: Accessories and Optional Equipment/Cellular Phone/Cellular Phone Microphone/Service

and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for telematics communication interface control

module replacement, setup, and programming

B2462

DTC B2462 (OnStar/Navigation GPS Antenna)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B2462 01

- Global Positioning System Short to Battery

DTC B2462 02

- Global Positioning System Short to Ground

DTC B2462 04

- Global Positioning System Open

Circuit/System Description

The cellular phone, navigation, and digital radio antenna is connected to the telematics communication interface control module. This module

supplies 5 V to the cellular phone, navigation, and digital radio antenna to power the internal amplifier. When the vehicle is equipped with the

optional navigation radio, a navigation signal splitter is installed to distribute the GPS signal to both the telematics communication interface control

module and the navigation radio. The navigation radio supplies 5 V through the GPS antenna coaxial cable to the navigation signal splitter to power

the internal navigation radio signal amplifier.

Conditions for Running the DTC

Onstar - Telematics Communication Interface Control Module

* Ignition is in the RUN or ACC position.

* System voltage is greater than 9 V and less than 16 V.

* The above conditions are present for greater than 1 second.

Navigation Radio

* Radio On.

* System voltage is greater than 9 V and less than 16 V.

* The navigation radio tests the GPS antenna every 10 seconds.

Conditions for Setting the DTC

B2462 01

The telematics communication interface control module and/or the navigation radio detect a short to B+ on the GPS antenna signal circuit.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 743

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B3948 02

- Left Front Turn Signal Circuit Short to Ground

DTC B3949 02

- Right Front Turn Signal Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

Ground is applied at all times to the turn signal/multifunction switch. The turn signal lamps may only be activated with the ignition switch in the

ON or START position. When the turn signal/multifunction switch is placed in either the TURN RIGHT or TURN LEFT position, ground is

applied to the body control module through either the right turn or left turn signal switch signal circuit. The BCM then applies a pulsating voltage to

the front and rear turn signal lamps through there respective voltage supply circuits. When a turn signal request is received by the BCM, a serial

data message is sent to the instrument cluster requesting the respective turn signal indicator be pulsed ON and OFF.

Conditions for Running the DTC

When the appropriate turn signal is commanded

Conditions for Setting the DTC

B3948 02

The BCM detects a short to ground on the left front turn signal control circuit.

B3949 02

The BCM detects a short to ground on the right front turn signal control circuit.

Action Taken When the DTC Sets

The appropriate turn signal lamp is inoperative.

Conditions for Clearing the DTC

* The DTC will be current for as long as the fault is present.

* When the fault is no longer present, the DTC will be a history DTC.

* A history DTC will clear after 50 ignition cycles.

Reference Information

Schematic Reference

Exterior Lights Schematics (See: Diagrams/Electrical Diagrams/Lighting and Horns/System Diagram/Exterior Lights Schematics)

Connector End View Reference

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2010 Cadillac Truck SRX AWD V6-3.0L Page 184

DTC B0085 0C

- Left Front Side Impact Sensor Low Current

DTC B0085 39

- Left Front Side Impact Sensor Internal Malfunction

DTC B0085 3A

- Left Front Side Impact Sensor Incorrect Component Installed

DTC B0085 71

- Left Front Side Impact Sensor Invalid Serial Data Received

DTC B0086 01

- Right Front Side Impact Sensor Short to Battery

DTC B0086 02

- Right Front Side Impact Sensor Short to Ground

DTC B0086 04

- Right Front Side Impact Sensor Open

DTC B0086 05

- Right Front Side Impact Sensor High/Voltage Open

DTC B0086 0C

- Right Front Side Impact Sensor Low Current

DTC B0086 39

- Right Front Side Impact Sensor Internal Malfunction

DTC B0086 3A

- Right Front Side Impact Sensor Incorrect Component Installed

DTC B0086 71

- Right Front Side Impact Sensor Invalid Data

DTC B0087 01

- Left Rear Side Impact Sensor Short to Battery

DTC B0087 02

- Left Rear Side Impact Sensor Short to Ground

DTC B0087 04

- Left Rear Side Impact Sensor Open

DTC B0087 05

- Left Rear Side Impact Sensor High/Voltage Open

DTC B0087 0C

- Left Rear Side Impact Sensor Low Current

DTC B0087 39

- Left Rear Side Impact Sensor Internal Malfunction

DTC B0087 3A

- Left Rear Side Impact Sensor Incorrect Component Installed

DTC B0087 71

- Left Rear Side Impact Sensor Invalid Serial Data Received

DTC B0088 01

- Right Rear Side Impact Sensor Short to Battery

DTC B0088 02

- Right Rear Side Impact Sensor Short to Ground

DTC B0088 04

- Right Rear Side Impact Sensor Open

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2010 Cadillac Truck SRX AWD V6-3.0L Page 533

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

6. Test for 1 - 7 Ohms between control circuit terminal 10 and control circuit terminal 4.

瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the E14D seat cushion

heating element.

瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the E14D seat

cushion heating element.

7. If all circuits test normal, replace the K40 seat memory control module.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Driver or Passenger Seat Back Cushion Heater Replacement (See: Body and Frame/Seats/Seat Temperature Element/Service and

Repair/Driver or Passenger Seat Back Cushion Heater Replacement)

* Driver or Passenger Seat Cushion Heater Replacement (See: Body and Frame/Seats/Seat Temperature Element/Service and Repair/Driver or

Passenger Seat Cushion Heater Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for seat memory control module replacement, setup,

and programming

Without Memory A45

DTC B2425 or B2430 (Without Memory A45)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B2425 0B

- Driver Seat Cushion Heater Circuit High Current

DTC B2425 0D

- Driver Seat Cushion Heater Circuit High Resistance

DTC B2425 0E

- Driver Seat Cushion Heater Circuit Low Resistance

DTC B2430 0B

- Passenger Seat Cushion Heater Circuit High Current

DTC B2430 0D

- Passenger Seat Cushion Heater Circuit High Resistance

DTC B2430 0E

- Passenger Seat Cushion Heater Circuit Low Resistance

Diagnostic Fault Information

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2010 Cadillac Truck SRX AWD V6-3.0L Page 88

DTC B0020 02

- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Short to Ground

DTC B0020 04

- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Open

DTC B0020 0D

- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 High Resistance

DTC B0020 0E

- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Low Resistance

DTC B0021 01

- Passenger Seat Side Air Bag Deployment Loop Short to Battery

DTC B0021 02

- Passenger Seat Side Air Bag Deployment Loop Short to Ground

DTC B0021 04

- Passenger Seat Side Air Bag Deployment Loop Open

DTC B0021 0D

- Passenger Seat Side Air Bag Deployment Loop High Resistance

DTC B0021 0E

- Passenger Seat Side Air Bag Deployment Loop Low Resistance

DTC B0022 01

- Passenger Seat Belt Retractor Pretensioner Deployment Loop Short to Battery

DTC B0022 02

- Passenger Seat Belt Retractor Pretensioner Deployment Loop Short to Ground

DTC B0022 04

- Passenger Seat Belt Retractor Pretensioner Deployment Loop Open Circuit

DTC B0022 0D

- Passenger Seat Belt Retractor Pretensioner Deployment Loop High Resistance

DTC B0022 0E

- Passenger Seat Belt Retractor Pretensioner Deployment Loop Low Resistance

DTC B0023 01

- Right Roof Rail Air Bag Deployment Loop Short to Battery

DTC B0023 02

- Right Roof Rail Air Bag Deployment Loop Short to Ground

DTC B0023 04

- Right Roof Rail Air Bag Deployment Loop Open

DTC B0023 0D

- Right Roof Rail Air Bag Deployment Loop High Resistance

DTC B0023 0E

- Right Roof Rail Air Bag Deployment Loop Low Resistance

Diagnostic Fault Information

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1484

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Note: Do not run secondary air injection pump for more than 1-2 minutes at a time. Running for an extended period of time without allowing

pump to cool may cause damage to the pump.

1. Ignition ON, observe the DTC information with a scan tool. Verify that DTC P2431, P2432, or P2433 is not set.

瀚慖f a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble

Code (DTC) List - Vehicle) for further diagnosis.

2. Observe the scan tool Secondary Air Injection Pressure Sensor voltage parameter. The reading should be between 1.0-4.0 V.

3. Compare the scan tool BARO pressure parameter to the Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and

Control Systems/Specifications/Altitude Versus Barometric Pressure) table. The BARO should be within the specified range displayed in the

table for the specific altitude.

瀚慖f not within the specified range, refer to DTC P2227, P2228, or P2229 (LAU) (See: P Code Charts/P2227) for further diagnosis.

4. Ignition ON, command the Secondary Air Injection Pump Relay ON and OFF with a scan tool. The secondary air injection pump should turn

ON and OFF.

5. Engine running, command the Secondary Air Injection Pump Relay ON with a scan tool while observing the Secondary Air Injection

Pressure Sensor parameter. The reading should change greater than 10 kPa (1.45 psi).

6. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Inspect the secondary air injection system for the following conditions:

* Hoses/pipes for a restriction or blockage

* Hoses/pipes for being disconnected

* Plugged secondary air injection pressure sensor port

* Damaged secondary air injection check valve

瀚慖f a condition is located, repair as necessary.

瀚慖f a condition is not located and the secondary air injection pump operates with no pressure change, replace the G21 secondary air

injection pump.

2. Ignition OFF, remove the KR25 secondary air injection pump relay.

3. Ignition ON, verify that a test lamp does not illuminate between the controlled output circuit terminal 30 and ground.

瀚慖f the test lamp illuminates, test the controlled output circuit for a short to voltage.

4. Verify that a test lamp illuminates between the secondary air injection pump relay switch B+ circuit terminal 87 and ground.

瀚慖f the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and

the relay coil ignition circuit fuse is open, test all components connected to the ignition circuit and replace as necessary.

5. Connect a 20 A fused jumper wire between the secondary air injection pump relay switch B+ circuit terminal 87 and the controlled output

circuit terminal 30. The G21 secondary air injection pump should turn ON.

瀚慖f the secondary air injection pump does not activate, test the controlled output circuit and the secondary air injection pump ground circuit

for an open/high resistance. If the circuits test normal, test or replace the G21 secondary air injection pump.

6. If all circuits test normal, replace the KR25 secondary air injection pump relay.

2010 Cadillac Truck SRX AWD V6-3.0L Page 114

2010 Cadillac Truck SRX AWD V6-3.0L Page 114

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B0014 01

- Driver Seat Side Air Bag Deployment Loop Short to Battery

DTC B0014 02

- Driver Seat Side Air Bag Deployment Loop Short to Ground

DTC B0014 04

- Driver Seat Side Air Bag Deployment Loop Open

DTC B0014 0D

- Driver Seat Side Air Bag Deployment Loop High Resistance

DTC B0014 0E

- Driver Seat Side Air Bag Deployment Loop Low Resistance

DTC B0015 01

- Driver Seat Belt Retractor Pretensioner Deployment Loop Short to Battery

DTC B0015 02

- Driver Seat Belt Retractor Pretensioner Deployment Loop Short to Ground

DTC B0015 04

- Driver Seat Belt Retractor Pretensioner Deployment Loop Open

DTC B0015 0D

- Driver Seat Belt Retractor Pretensioner Deployment Loop High Resistance

DTC B0015 0E

- Driver Seat Belt Retractor Pretensioner Deployment Loop Low Resistance

DTC B0016 01

- Left Roof Rail Air Bag Deployment Loop Short to Battery

DTC B0016 02

- Left Roof Rail Air Bag Deployment Loop Short to Ground

DTC B0016 04

- Left Roof Rail Air Bag Deployment Loop Open

DTC B0016 0D

- Left Roof Rail Air Bag Deployment Loop High Resistance

DTC B0016 0E

- Left Roof Rail Air Bag Deployment Loop Low Resistance

DTC B0019 01

- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Short to Battery

DTC B0019 02

- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Short to Ground

DTC B0019 04

- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Open

DTC B0019 0D

- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 High Resistance

DTC B0019 0E

- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Low Resistance

DTC B0020 01

- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Short to Battery

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2010 Cadillac Truck SRX AWD V6-3.0L Page 369

The sunshade module has detected and reported via the LIN-Bus that the sunroof sunshade position select switch circuit is open or shorted to

voltage.

B369B 59

The sunshade module has detected and reported via the LIN-Bus that the sunroof sunshade position select switch has been the same active position

for 20 s after the glass has stopped moving in the requested direction due to reaching the end of the allowable motion.

Action Taken When the DTC Sets

DTC B369B is stored in the body control module (BCM) memory.

Conditions for Clearing the DTC

The BCM no longer detects a malfunction in the sunroof sunshade position select switch signal circuit.

Reference Information

Schematic Reference

Sunroof Schematics (See: Body and Frame/Roof and Associated Components/Sunroof / Moonroof/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Sunroof Description and Operation (See: Body and Frame/Roof and Associated Components/Sunroof / Moonroof/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Circuit/System Testing

Note: Because of the accessibility of the sunshade switch, perform the component testing before beginning the Circuit/System Testing.

1. Ignition OFF, disconnect the harness connector at the S90 sunroof sunshade switch.

2. Scan tool not connected, doors closed, wait 5 minutes and test for less than 10 ohm between the low reference circuit terminal 1 and ground.

瀚慖f greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K62

sunroof sunshade module.

3. Ignition ON, test for 4.5-5.5 V between the reference voltage circuit terminal 4 and ground.

瀚慖f less than specified range, test the reference voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K62 sunroof sunshade module.

瀚慖f greater than the specified range, test the reference circuit for a short to voltage. If the circuit tests normal, replace the K62 sunroof

sunshade module.

4. If all circuits test normal, test or replace the S90 sunroof sunshade switch.

Component Testing

Static Test

1. Ignition OFF, disconnect the harness connector at the S90 sunroof sunshade switch.

2. Test for 3.6-3.7k ohm between the switch terminals 1 and 4.

瀚慖f not within the specified range, replace the S90 sunroof sunshade switch.

3. Test for 430-440 ohm between the signal terminal 1 and the low reference circuit terminal 4 while pressing the open switch.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 689

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing

DTC B3715

1. Ignition OFF, disconnect the KR12B windshield wiper relay.

2. Test for less than 5 ohm between the ground circuit terminal 85 and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

3. Connect a test lamp between the control circuit terminal 86 and ground.

4. Ignition ON, command the low speed wipers ON and OFF using the S82 windshield wiper/washer switch. The test lamp should turn ON and

OFF when changing between the commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.

瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the K9 BCM.

5. If all circuits test normal, test or replace the KR12B windshield wiper relay.

DTC B3875

1. Ignition OFF, disconnect the KR12C windshield wiper speed control relay.

2. Ignition ON, verify a test lamp illuminates between B+ circuit terminal 85 and ground.

瀚慖f the test lamp does not illuminate, test or replace the underhood fuse block.

3. Connect a test lamp between the control circuit terminal 86 and B+.

4. Command the high speed wipers ON and OFF using the S82 windshield wiper/washer switch. The test lamp should turn ON and OFF when

changing between the commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.

瀚慖f the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace

the K9 BCM.

5. If all circuits test normal, test or replace the KR12C windshield wiper speed control relay.

Component Testing

Relay Test

1. Ignition OFF, disconnect the appropriate relay.

2. Test for 60-200 ohm between terminals 85 and 86.

瀚慖f the resistance is not within the specified range, replace the relay.

3. Test for infinite resistance between the following terminals:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

瀚慖f not the specified value, replace the relay.

4. Test for less than 5 ohm between terminals 30 and 87A.

瀚慖f greater than the specified value, replace the relay.

5. Install a 10 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for

less than 5 ohm between terminals 30 and 87.

瀚慖f greater than the specified range, replace the relay.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1163

瀚慖f less than the specified range, test for a short between the high voltage supply circuit and high voltage control circuit. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).

瀚慖f greater than the specified range, test the high voltage supply circuit and high voltage control circuit for an open/high resistance. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector.

Component Testing

* Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection

)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and

Inspection)

* Fuel Injector Balance Test (LAU) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Fuel Injector Balance Test)Fuel Injector Balance Test (LF1, LFW) (See: Powertrain Management/Computers and

Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector Balance Test)

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 1)

* Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P124D

DTC P1248, P1249, P124A, P124B, P124C, or P124D (LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P1248

- Cylinder 1 Injector High Control Circuit Shorted to Control Circuit

DTC P1249

- Cylinder 2 Injector High Control Circuit Shorted to Control Circuit

DTC P124A

- Cylinder 3 Injector High Control Circuit Shorted to Control Circuit

DTC P124B

- Cylinder 4 Injector High Control Circuit Shorted to Control Circuit

DTC P124C

- Cylinder 5 Injector High Control Circuit Shorted to Control Circuit

DTC P124D

- Cylinder 6 Injector High Control Circuit Shorted to Control Circuit

Diagnostic Fault Information

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2010 Cadillac Truck SRX AWD V6-3.0L Page 620

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Circuit/System Verification

Verify none of the following DTCs are set:

* DTC B3109

* DTC B3110

* DTC B3111

* DTC B3112

* DTC B3113

If any of the DTCs are set, replace the battery in the appropriate keyless entry transmitter. Operate the transmitter 3 consecutive times. If the DTC

resets, replace the keyless entry transmitter.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Replacing Keys (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Service and Repair/Replacing Keys)

B3113

DTC B3109-B3113

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions)provides an overview of each diagnostic category.

DTC Descriptors

DTC B3109 00

- Keyless Entry Transmitter 1 Battery

DTC B3110 00

- Keyless Entry Transmitter 2 Battery

DTC B3111 00

- Keyless Entry Transmitter 3 Battery

DTC B3112 00

- Keyless Entry Transmitter 4 Battery

DTC B3113 00

- Keyless Entry Transmitter 5 Battery

Circuit/System Description

With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the remote control

door lock receiver, along with the commanded keyless entry function. The remote control door lock receiver sends this to the body control module

(BCM) to perform the requested function.

Conditions for Running the DTC

A keyless transmitter button is pressed.

Conditions for Setting the DTC

3 consecutive low battery signals are received from the same transmitter.

Action Taken When the DTC Sets

The keyless entry system is inoperative.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1316

Schematic Reference

Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Fuel System Description (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel System

Description)Fuel System Description (LAU or LY7) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and

Operation/Fuel System Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the G12 fuel pump.

2. Connect a test lamp between the control circuit terminal A and ground.

3. Ignition ON, command the ECM fuel pump enable command ON and OFF with a scan tool. The test lamp should turn ON and OFF, when

changing between the commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K27 fuel pump control

module.

瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the K27 fuel pump control module.

4. Ignition OFF, connect a test lamp between the control circuit terminal A and the low reference circuit terminal B.

5. Ignition ON, command the ECM fuel pump enable command ON with a scan tool. The test lamp should illuminate.

瀚慖f the test lamp does not illuminate, test the low reference circuit terminal B for a short to voltage or an open/high resistance. If the circuit

tests normal, replace the K27 fuel pump control module.

6. If all circuits test normal, replace the G12 fuel pump.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuel Pump Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Service and Repair/Fuel Pump

Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for fuel pump control module replacement, setup,

and programming

P0232

DTC P0231, P0232, or P023F

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

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2010 Cadillac Truck SRX AWD V6-3.0L Page 891

DTC C1209 00

- Left Rear Wheel Speed Sensor Circuit High Input Malfunction

DTC C1210 00

- Right Rear Wheel Speed Sensor Circuit High Input Malfunction

DTC C1221 00

- Left Front Wheel Speed Sensor Circuit Malfunction

DTC C1222 00

- Right Front Wheel Speed Sensor Circuit Malfunction

DTC C1223 00

- Left Rear Wheel Speed Sensor Circuit Malfunction

DTC C1224 00

- Right Rear Wheel Speed Sensor Circuit Malfunction

DTC C1225 00

- Left Front Wheel Speed Sensor Circuit Performance Malfunction

DTC C1226 00

- Right Front Wheel Speed Sensor Circuit Performance Malfunction

DTC C1227 00

- Left Rear Wheel Speed Sensor Circuit Performance Malfunction

DTC C1228 00

- Right Rear Wheel Speed Sensor Circuit Performance Malfunction

DTC C1232 00

- Left Front Wheel Speed Sensor Circuit Low Input Malfunction

DTC C1233 00

- Right Front Wheel Speed Sensor Circuit Low Input Malfunction

DTC C1234 00

- Left Rear Wheel Speed Sensor Circuit Low Input Malfunction

DTC C1235 00

- Right Rear Wheel Speed Sensor Circuit Low Input Malfunction

Circuit/System Description

The wheel speeds are detected by active wheel speed sensors. Each wheel speed sensor receives a 12 V reference voltage from the electronic brake

control module (EBCM) and provides an alternating current square wave signal to the EBCM. As the wheel spins, the EBCM uses the frequency of

the square wave signal to calculate the wheel speed. The EBCM sends the wheel speed information as a high speed controller area network (CAN)

serial data message.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

A supervised periodic message that includes the wheel speed serial data has not been received.

Action Taken When the DTC Sets

Specific subsystems will not function or operate in degraded mode.

Conditions for Clearing the DTC

A current DTC clears when the diagnostic runs and passes.

Reference Information

Schematic Reference

Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)

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2010 Cadillac Truck SRX AWD V6-3.0L Page 553

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Radio Antenna Base Replacement (See: Accessories and Optional Equipment/Antenna/Antenna, Radio/Service and Repair/Radio Antenna

Base Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for telematics communication interface control

module replacement, setup, and programming

B2476

DTC B2476 or B2482

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B2476 04

- Cellular Phone Select Service Switch Open Circuit

DTC B2476 59

- Cellular Phone Select Service Switch Stuck Button

DTC B2482 00

- Cellular Phone Select Service Switch Range/Performance

Diagnostic Fault Information

Circuit/System Description

The OnStar(R) button assembly consists of 3 buttons, Call/Answer, OnStar(R) Call Center, and OnStar(R) Emergency. The telematics

communication interface control module supplies the OnStar(R) button assembly with 10 V via the keypad supply voltage circuit. Each of the

buttons, when pressed, completes the circuit across a resistor allowing a specific voltage to be returned to the telematics communication interface

control module over the keypad signal circuit. Depending upon the voltage range returned, the telematics communication interface control module

is able to identify which button has been activated.

Conditions for Running the DTC

* Ignition ON.

* Battery voltage must be between 9-16 V.

Conditions for Setting the DTC

B2476 04

The telematics communication interface control module detects an open/high resistance on the keypad supply voltage circuit.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 41

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2010 Cadillac Truck SRX AWD V6-3.0L Page 146

* The SDM requests the instrument cluster to illuminate the AIR BAG indicator.

* The SDM will store a DTC, however if an event occurs the system will still attempt deployments.

Conditions for Clearing the DTC

* The condition for setting the DTC no longer exists.

* A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Diagnostic Aid

Note: The following diagnostic aids apply for both current and history DTCs.

An incorrectly installed CPA or incorrectly seated connector can cause a shorting bar to short both control circuits together. Check the connectors

and CPAs if a DTC with symptom byte 02 or 0E is set, to ensure the shorting bars are not causing the circuits to be shorted together. Shorting bars

are used in the locations listed below:

* Passenger instrument panel air bag

* Driver and passenger seat side air bags

* Left and right roof rail air bags

* Driver and passenger seat belt retractor pretensioners

* SDM

* Inline connectors - on the side of the harness connector

* Harness side of the SDM connector

Terminal fretting or incorrectly seated connector can cause an open/high resistance condition. Check the circuit terminals for fretting or incorrectly

seated connector if a DTC with symptom byte 04 or 0D is set. If DTCs of deployment loops which are in the seat DTC B0014 and B0021, can

occur because of stress or damage to the harness due to seat movement. Move the seat to the full extend of travel while using the scan tool to

observe deployment type loop parameters.

If the pretensioner, passenger instrument panel or side air bag has inflated under unexpected conditions and/or DTC with symptom byte 01 is set,

check both control circuits for a short to voltage.

Reference Information

Schematic Reference

SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/Description and Operation/SIR System)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Note:

* Refer to SIR Service Precautions (See: Restraints and Safety Systems/Air Bag Systems/Service Precautions/Technician Safety Information).

* Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or

replacement of the affected component/connector.

- Seat belt retractor pretensioner

- Passenger instrument panel air bag

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2010 Cadillac Truck SRX AWD V6-3.0L Page 675

Action Taken When the DTC Sets

Adjustable pedals operation will be disabled.

Conditions for Clearing the DTC

* The current DTC will clear and set the code to history, 3 seconds after the fault is no longer present and the power mode changes to OFF then

back to ACC or RUN.

* The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Adjustable Pedal Schematics (See: Accessories and Optional Equipment/Pedal Positioning System/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Adjustable Pedals Description and Operation (See: Accessories and Optional Equipment/Pedal Positioning System/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, vehicle in P (Park), observe the scan tool Adjustable Pedal Control Switch parameters while pressing the adjustable pedal switch in

both directions. The readings should change between Inactive and Active for both directions.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the S1 adjustable pedal control switch.

2. Wait 3 minutes, test for less than 10 ohm between the ground circuit terminal 1 and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify the scan tool Adjustable Pedal Control Switch parameter is Inactive.

瀚慖f not the specified value, test the signal circuit terminal 3 and signal circuit terminal 5 for a short to ground. If the circuits test normal,

replace K40 memory seat control module.

4. Install a 3 A fused jumper wire between the signal terminal 3 and ground. The scan tool Adjustable Pedals Direction Command parameter

should be Forward.

瀚慖f not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace K40 memory seat control

module.

5. Install a 3 A fused jumper wire between the signal terminal 5 and ground. The scan tool Adjustable Pedals Direction Command parameter

should be Rearward.

瀚慖f not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace K40 memory seat control

module.

6. If all circuits tests normal, replace the S1 adjustable pedal control switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the S1 adjustable pedal control switch.

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The HVAC control module detects the sensor signal out of range. The signal voltage is less than 0.1 V or greater than 4.9 V for more than 50 ms.

B0183 02

The 5 V identification pulse is not received.

B0183 05

The input signal is static and greater than 4.8 V.

B1405 02

Clocked supply for multi zone sensor is shorted to ground.

B1405 05

Clocked supply for multi zone sensor is shorted to voltage or open.

Action Taken When the DTC Sets

* The system will use the last valid values as default.

* If no value is read at the time of fault, the HVAC Control Module uses 0 W/m(2) as intensity, 45掳 for elevation and -75掳 for azimuth.

Conditions for Clearing the DTC

B0163 02 or B0163 05

The sensor signal is within specified range between 0.1-4.9 V.

B0183 02

The 5 V identification pulse will be received.

B0183 05

The correct pulse signal succession will be received.

B1405 02 or B1405 05

The condition for setting the DTC is no longer present.

Reference Information

Schematic Reference

HVAC Schematics (See: Heating and Air Conditioning/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Automatic HVAC Description and Operation (See: Heating and Air Conditioning/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Verify that DTC B1405 02 or B1405 05 is not set.

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DTC P0203

- Cylinder 3 Injector Control Circuit

DTC P0204

- Cylinder 4 Injector Control Circuit

DTC P0205

- Cylinder 5 Injector Control Circuit

DTC P0206

- Cylinder 6 Injector Control Circuit

DTC P0261

- Cylinder 1 Injector Control Circuit Low Voltage

DTC P0262

- Cylinder 1 Injector Control Circuit High Voltage

DTC P0264

- Cylinder 2 Injector Control Circuit Low Voltage

DTC P0265

- Cylinder 2 Injector Control Circuit High Voltage

DTC P0267

- Cylinder 3 Injector Control Circuit Low Voltage

DTC P0268

- Cylinder 3 Injector Control Circuit High Voltage

DTC P0270

- Cylinder 4 Injector Control Circuit Low Voltage

DTC P0271

- Cylinder 4 Injector Control Circuit High Voltage

DTC P0273

- Cylinder 5 Injector Control Circuit Low Voltage

DTC P0274

- Cylinder 5 Injector Control Circuit High Voltage

DTC P0276

- Cylinder 6 Injector Control Circuit Low Voltage

DTC P0277

- Cylinder 6 Injector Control Circuit High Voltage

Diagnostic Fault Information

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Circuit/System Testing

1. Ignition OFF, remove the KR25 secondary air injection pump relay.

2. Ignition ON, verify that a test lamp does not illuminate between the controlled output circuit terminal 30 and ground.

瀚慖f the test lamp illuminates, test the controlled output circuit for a short to voltage.

3. Verify that a test lamp illuminates between the secondary air injection pump relay coil B+ circuit terminal 86 and ground.

瀚慖f the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and

the ignition circuit fuse is open, test all components connected to the ignition circuit and replace as necessary.

4. Connect a test lamp between the control circuit terminal 85 and the secondary air injection pump relay coil B+ circuit terminal 86.

5. Command the secondary air injection pump relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing

between the commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K20 engine control

module.

瀚慖f the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace

the K20 engine control module.

6. If all circuits test normal, test or replace the KR25 secondary air injection pump relay.

Component Testing

1. Ignition OFF, disconnect the KR25 secondary air injection pump relay.

2. Test for 70-110 ohm between terminals 85 and 86.

瀚慖f the resistance is not within the specified range, replace the KR25 secondary air injection pump relay.

3. Test for infinite resistance between the following terminals:

* 86 and 87

* 86 and 30

* 85 and 87

* 87 and 30

瀚慖f not the specified value, replace the KR25 secondary air injection pump relay.

4. Install a 20 A fused jumper wire between relay terminal 86 and B+. Install a jumper wire between relay terminal 85 and ground. Test for less

than 2 ohm between terminals 87 and 30.

瀚慖f greater than the specified range, replace the KR25 secondary air injection pump relay.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning)for engine control module replacement, setup, and

programming

P0420

DTC P0420 or P0430

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions)provides an overview of each diagnostic category.

DTC Descriptor

DTC P0420

- Catalyst System Low Efficiency Bank 1

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* Control Module References (See: Testing and Inspection/Programming and Relearning)for BCM replacement, programming and setup

C1100

DTC C1100

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions)provides an overview of each diagnostic category.

DTC Descriptors

DTC C1100 00

- Brake Pressure Sensor 2 Malfunction

DTC C1100 01

- Brake Pressure Sensor 2 Short to Battery

DTC C1100 02

- Brake Pressure Sensor 2 Short to Ground

DTC C1100 08

- Brake Pressure Sensor 2 Performance - Signal Invalid

DTC C1100 09

- Brake Pressure Sensor 2 Too Fast Transitions

DTC C1100 5A

- Brake Pressure Sensor 2 Not Plausible

Diagnostic Fault Information

Circuit/System Description

The brake booster vacuum sensor measures the vacuum in the brake booster assembly. The electronic brake control module (EBCM) supplies a 5 V

reference and a low reference circuit to the brake booster vacuum sensor. The vacuum sensor supplies a voltage signal in relation to the pressure in

the brake booster to the EBCM.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

C1100 00

The vacuum sensor signal is out of the specified range.

C1100 01

The EBCM detected a short to voltage on the vacuum sensor 5 V reference circuit.

C1100 02

The EBCM detected a short to ground on the vacuum sensor 5 V reference circuit.

C1100 08, C1100 09, and C1100 5A

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DTC B0088 05

- Right Rear Side Impact Sensor High/Voltage Open

DTC B0088 0C

- Right Rear Side Impact Sensor Low Current

DTC B0088 39

- Right Rear Side Impact Sensor Internal Malfunction

DTC B0088 3A

- Right Rear Side Impact Sensor Incorrect Component Installed

DTC B0088 71

- Right Rear Side Impact Sensor Invalid Data

Diagnostic Fault Information

Circuit/System Description

The impact sensors are equipped on vehicles to supplement the Supplemental Inflatable Restraint (SIR) System performance. The impact sensors

are electronic and are not part of the deployment loops, but instead provide inputs to the sensing and diagnostic module (SDM). The impact sensors

can assist in determining the severity of some frontal and side collisions. The SDM uses the input from the impact sensors to assist in determining

the severity of a collision further supporting air bag deployment. If the SDM determines a deployment is warranted, the SDM will cause current to

flow through the deployment loops deploying the frontal air bags.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

Any of the following conditions exist for 10 seconds:

B0083 01, B0084 01, B0085 01, B0086 01, B0087 01, B0088 01

The sensor has been shorted to voltage.

B0083 02, B0084 02, B0085 02, B0086 02, B0087 02, B0088 02

* The sensor has been shorted to ground.

* The sensor current is greater than 23 mA for greater than 5 milliseconds.

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C1233

DTC C1207-C1210, C1221-C1228, or C1232-C1235

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions)provides an overview of each diagnostic category.

DTC Descriptor

DTC C1207 00

- Left Front Wheel Speed Sensor Circuit High Input Malfunction

DTC C1208 00

- Right Front Wheel Speed Sensor Circuit High Input Malfunction

DTC C1209 00

- Left Rear Wheel Speed Sensor Circuit High Input Malfunction

DTC C1210 00

- Right Rear Wheel Speed Sensor Circuit High Input Malfunction

DTC C1221 00

- Left Front Wheel Speed Sensor Circuit Malfunction

DTC C1222 00

- Right Front Wheel Speed Sensor Circuit Malfunction

DTC C1223 00

- Left Rear Wheel Speed Sensor Circuit Malfunction

DTC C1224 00

- Right Rear Wheel Speed Sensor Circuit Malfunction

DTC C1225 00

- Left Front Wheel Speed Sensor Circuit Performance Malfunction

DTC C1226 00

- Right Front Wheel Speed Sensor Circuit Performance Malfunction

DTC C1227 00

- Left Rear Wheel Speed Sensor Circuit Performance Malfunction

DTC C1228 00

- Right Rear Wheel Speed Sensor Circuit Performance Malfunction

DTC C1232 00

- Left Front Wheel Speed Sensor Circuit Low Input Malfunction

DTC C1233 00

- Right Front Wheel Speed Sensor Circuit Low Input Malfunction

DTC C1234 00

- Left Rear Wheel Speed Sensor Circuit Low Input Malfunction

DTC C1235 00

- Right Rear Wheel Speed Sensor Circuit Low Input Malfunction

Circuit/System Description

The wheel speeds are detected by active wheel speed sensors. Each wheel speed sensor receives a 12 V reference voltage from the electronic brake

control module (EBCM) and provides an alternating current square wave signal to the EBCM. As the wheel spins, the EBCM uses the frequency of

the square wave signal to calculate the wheel speed. The EBCM sends the wheel speed information as a high speed controller area network (CAN)

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- Right Rear Wheel Speed Sensor Circuit Low Input Malfunction

Circuit/System Description

The wheel speeds are detected by active wheel speed sensors. Each wheel speed sensor receives a 12 V reference voltage from the electronic brake

control module (EBCM) and provides an alternating current square wave signal to the EBCM. As the wheel spins, the EBCM uses the frequency of

the square wave signal to calculate the wheel speed. The EBCM sends the wheel speed information as a high speed controller area network (CAN)

serial data message.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

A supervised periodic message that includes the wheel speed serial data has not been received.

Action Taken When the DTC Sets

Specific subsystems will not function or operate in degraded mode.

Conditions for Clearing the DTC

A current DTC clears when the diagnostic runs and passes.

Reference Information

Schematic Reference

Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool EBCM Wheel Speed Sensor parameters. The reading should be the same speed on all sensors when driving in a

straight line at a speed greater than 20 km/h (13 MPH).

Circuit/System Testing

1. Ignition ON, verify that DTC C0035, C0040, C0045, or C0050 is not present in the EBCM.

瀚慖f any listed DTC is present, refer to DTC C0035, C0040, C0045, or C0050 (See: C Code Charts/C0035) to diagnose that DTC prior to

this diagnostic.

2. Replace the K17 Electronic Brake Control Module (EBCM) and verify the DTC does not reset.

瀚慖f the DTC resets, replace the module that set the DTC.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

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overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0171

- Fuel Trim System Lean Bank 1

DTC P0172

- Fuel Trim System Rich Bank 1

DTC P0174

- Fuel Trim System Lean Bank 2

DTC P0175

- Fuel Trim System Rich Bank 2

Circuit/System Description

The engine control module (ECM) controls a Closed Loop air/fuel metering system in order to provide the best possible combination of

driveability, fuel economy, and emission control. The ECM monitors the heated oxygen sensor (HO2S) signal voltage, and adjusts the fuel delivery

based on the signal voltage while in Closed Loop. A change made to the fuel delivery changes the long and short term fuel trim values. The short

term fuel trim values change rapidly in response to the HO2S signal voltages. These changes fine tune the engine fueling. The long term fuel trim

values change in response to trends in the short term fuel trim The long term fuel trim makes coarse adjustments to fueling in order to re-center and

restore control to short term fuel trim. The ideal fuel trim values are around 0 %. A positive fuel trim value indicates that the ECM is adding fuel in

order to compensate for a lean condition. A negative fuel trim value indicates that the ECM is reducing the amount of fuel in order to compensate

for a rich condition.

Conditions for Running the DTC

* DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0201-P0206, P0300-P0306, P0442, P0443, P0446, P0449, P0451-P0455, P0496,

P0506, P0507, P2227-P2230, P2269 are not set.

* The engine is in Closed Loop status.

* The engine coolant temperature (ECT) is between -38 and +150掳C (-36 and +302掳F).

* The intake air temperature (IAT) is between -38 and +150掳C (-36 and +302掳F).

* The manifold absolute pressure (MAP) is between 5-255 kPa (1.45-37 psi).

* The vehicle speed is less than 134 km/h (83 mph).

* The engine speed is between 400-6,600 RPM.

* The mass air flow (MAF) is between 0.5-510 g/s.

* The barometric pressure (BARO) is greater than 70 kPa (10.2 psi).

* The fuel level is greater than 10 %.

* This diagnostic runs continuously when the above conditions have been met.

Conditions for Setting the DTC

* The average long term FT weighted average value is greater or less than a calibrated value.

* The above condition is present for approximately 3 min after the Conditions for Running the DTC have been met.

Action Taken When the DTC Sets

DTCs P0171, P0172, P0174, and P0175 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0171, P0172, P0174, and P0175 are Type B DTCs.

Diagnostic Aids

* Allow the engine to reach operating temperature. With the engine running, observe the HO2S parameter with a scan tool. The HO2S value

should vary from approximately 40 mV to approximately 900 mV, and respond to fueling changes.

* The normal Short Term FT and Long Term FT parameters should be between +10 and -10 % with 0 % the optimum, with the engine running

at operating temperature.

* An HO2S will not cause this DTC to set without the occurrence of the circuit related HO2S DTCs. Do not replace an HO2S to address this

DTC.

* A fuel system delivery condition causes this DTC to set. Thoroughly inspect all items that cause a rich or a lean condition. Refer to Fuel

System Diagnosis (LF1 China) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel

System Diagnosis (China))Fuel System Diagnosis (LF1 Except China) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Pump/Testing and Inspection/Fuel System Diagnosis (Except China))Fuel System Diagnosis (LAU China) (See: Powertrain

Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (China))Fuel System Diagnosis