FORD: December 2020

Thursday, December 31, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 763

Conditions for Running the DTC

Ignition OFF, ACCESSORY, or RUN mode.

Conditions for Setting the DTC

The parking brake control module has an internal counter which keeps track of dynamic applies. When the counter reaches the threshold value this

DTC will set.

Action Taken When the DTC Sets

A message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

* The parking brake control module clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

* Adjust or replace the park brake pads.

Reference Information

Schematic Reference

Park Brake System Schematics (See: Brakes and Traction Control/Parking Brake System/Diagrams/Electrical Diagrams)

Connector End View Reference

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

Description and Operation

Electronic Parking Brake Control Module Description (See: Brakes and Traction Control/Parking Brake System/Parking Brake Control

Module/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

Verify DTC C028D is not set.

If DTC is set, replace the rear brake pads and perform the Parking Brake Calibration procedure.

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 parking brake control module replacement, setup, and

programming.

C028F

DTC C028F

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

2010 Cadillac Truck SRX AWD V6-3.0L Page 319

Relay Test

1. Ignition OFF, disconnect the KR5 rear defogger relay.

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

瀚慖f not within the specified range, replace the KR5 rear defogger 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 KR5 rear defogger relay.

4. Install a 25A fused jumper wire between relay terminal 86 and 12V. Install a jumper wire between relay terminal 85 and ground. Test for less

than 2 ohm between terminals 30 and 87.

瀚慖f greater than the specified range, replace the KR5 rear defogger 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 HVAC control module replacement, setup and

programming

B291A

DTC B291A

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 B291A 39

- Content Theft Deterrent Assembly Internal Malfunction

Circuit/System Description

The content theft deterrent intrusion/inclination sensor performers an internal self-check to determine it is functioning properly.

Conditions for Running the DTC

* The ignition is OFF.

* The vehicle is in Park.

Conditions for Setting the DTC

The body control module (BCM) detects an internal failure within the content theft deterrent intrusion/inclination sensor.

Action Taken When the DTC Sets

The intrusion and inclination output is disabled.

Conditions for Clearing the DTC

* A current DTC is cleared when the conditions for setting the DTC are no longer present.

2010 Cadillac Truck SRX AWD V6-3.0L Page 1010

Conditions for Clearing the DTC

DTCs P0016, P0017, P0018, and P0019 are type B DTCs.

Diagnostic Aids

* Inspect the engine for any recent engine mechanical repairs. An incorrectly installed secondary timing chain can cause this DTC to set.

* This diagnostic algorithm is designed to detect an alignment condition between a primary intermediate sprocket and the secondary timing

chain, or the alignment between a primary intermediate sprocket and the crankshaft. Either condition would cause the camshaft timing for

both cams on one bank to be off an equal number of degrees.

* DTCs P0016, P0017, P0018, and P0019 set at the same time indicates a possible condition with the primary timing chain and the alignment

between both intermediate sprockets and the crankshaft. Or, the crankshaft reluctor wheel has moved and is no longer referenced to top dead

center (TDC).

* Observing the desired and actual camshaft angle parameters, with a scan tool before a DTC sets, may help to isolate whether a condition is

specific to one camshaft, one bank, or caused by a condition with the primary crankshaft timing.

Reference Information

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

Camshaft Actuator System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Camshaft

Actuator System)

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 ON, observe the DTC information with a scan tool. Verify that none of the following DTCs are set. DTC P0010, P0013, P0020,

P0023, P0335, P0336, P0340, P0341, P0345, P0346, P0365, P0366, P0390, or P0391.

瀚慖f any of the DTCs listed are set refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) for further diagnosis.

2. Idle the engine at normal operating temperature. DTCs P0016, P0017, P0018, or P0019 should not set.

瀚慖f a DTC sets, inspect for the following and repair as necessary:

* The correct installation of the camshaft sensors

* The correct installation of the crankshaft sensor

* A timing chain tensioner condition

* An incorrectly installed timing chain

* Excessive play in the timing chain

* A mechanical cam actuator that is stuck in the full advance or retard position.

* A timing chain that jumped teeth

* A crankshaft reluctor wheel that has moved in relationship to top dead center (TDC) on the crankshaft

3. 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

2010 Cadillac Truck SRX AWD V6-3.0L Page 994

The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding

air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the

HO2S signal voltage while calculating the air-to-fuel ratio. While the engine runs, the HO2S heats up and begins to generate a voltage within a

range of 0-1,275 mV. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module

uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases toward 1,000 mV indicates a rich fuel mixture. An HO2S

voltage that decreases toward 0 mV indicates a lean fuel mixture.

The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed

Loop earlier and the control module to calculate the air-to-fuel ratio sooner.

Conditions for Running the DTC

P0133, P0153, P1133, or P1153

* DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0128,

P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0220, P0222, P0223, P0442, P0443, P0446, P0449, P0455, P0496, P1516,

P2101, P2119, P2135, P2176 are not set.

* The engine coolant temperature (ECT) is greater than 71掳C (159掳F).

* The intake air temperature (IAT) is warmer than -40掳C (-40掳F)

* The ignition 1 voltage is between 10-32 V.

* The fuel level is greater than 10 %.

* The engine run time is greater than 60 s.

* The engine speed is between 1,000-3,000 RPM.

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

* The mass airflow (MAF) is between 15-55 g/s.

* The fuel system is in Closed Loop.

* The throttle position (TP) is greater than 5 %.

* The DTCs run once per drive cycle when the above conditions are met.

P013A P013C, P013E, or P014A

* Before the ECM can report DTC P013A, or P013C failed, DTCs P013E, P014A, P2270, and P2272 must run and pass.

* Before the ECM can report DTC P013E, or P014A failed, DTCs P2270 and P2272 must run and pass.

* DTCs P0030, P0036, P0053, P0054, P0101, P0102, P0103, P0106, P0107, P0108, P0120, P0121, P0122, P0123, P0131, P0132, P0133,

P0134, P0135, P0137, P0138, P013A, P013B, P013E, P013F, P0140, P0141, P0171, P0172, P0201, P0202, P0203, P0204, P0220, P0222,

P0223, P0300, P0442, P0443, P0446, P0449, P0455, P0496, P1133, P1174, P1516, P2101, P2119, P2135, P2176, P2270, P2271, P2A00 are

not set.

* The ignition 1 voltage is between 10-32 V.

* The learned heater resistance is valid.

* The fuel level is greater than 10 %.

* The engine run time is equal to or greater than 5 min.

* The accelerator pedal (APP) is steady.

* The torque converter clutch (TCC) is applied.

* The DTCs run once per ignition cycle, during decel fuel cut-off (DFCO), when the above conditions are met.

P013B P013D, P013F, or P014B

* Before the ECM can report DTC P013B, or P013D failed, DTCs P013A, P013C, P013E, P013F, P014A, P014B, P2270, P2271, P2272, and

P2273 must run and pass.

* Before the ECM can report DTC P013F, or P014B failed, DTCs P013A, P013C, P013E, P014A, P2270, P2271, P2272, and P2273 must run

and pass.

* DTCs P0030, P0036, P0053, P0054, P0101, P0102, P0103, P0106, P0107, P0108, P0120, P0121, P0122, P0123, P0131, P0132, P0133,

P0134, P0135, P0137, P0138, P013A, P013B, P013E, P013F, P0140, P0141, P0171, P0172, P0201, P0202, P0203, P0204, P0220, P0222,

P0223, P0300, P0442, P0443, P0446, P0449, P0455, P0496, P1133, P1174, P1516, P2101, P2119, P2135, P2176, P2270, P2271, P2A00 are

not set.

* The ignition 1 voltage is between 10-32 V.

* The learned heater resistance is valid.

* The fuel level is greater than 10 %.

* The engine run time is equal to or greater than 5 min.

* The DTCs run once per ignition cycle when the above conditions are met.

Conditions for Setting the DTC

P0133 or P0153

* The ECM detects that the HO2S 1 rich-to-lean or lean-to-rich average response time is greater than a calibrated value.

* The DTCs set within 60 s when the above condition is met.

P013A or P013C

The ECM detects that the accumulated mass air flow monitored during rich-to-lean transitions between 450-150 mV is greater than 75 grams.

2010 Cadillac Truck SRX AWD V6-3.0L Page 858

Connector End View Reference

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

Description and Operation

Electronic Suspension Control Description and Operation (See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic

)/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 Vertical Wheel Acceleration parameters. The parameters should be 0 m/s(2) when the vehicle is parked on a

level surface.

Circuit/System Testing

1. Ignition ON, verify that DTC C0870 is not present.

瀚慖f the DTC is present, refer to DTC C0870 (See: C Code Charts/C0870) to diagnose that DTC prior to this diagnostic.

2. Ignition OFF, disconnect the harness connector at the appropriate B161 vertical suspension acceleration sensor.

3. Ignition OFF, open/close doors, and wait 60 seconds. Test for less than 5 ohm between the low reference circuit terminal C and ground.

瀚慖f greater than the specified value, test the low reference circuit for short to voltage or an open/high resistance. If the circuit tests normal,

replace the K19 Suspension Control Module.

4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal A and ground.

瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K19 suspension control module.

瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K19

suspension control module.

5. Test for 4.8-5.2 V between the signal circuit terminal B and ground.

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

the K19 suspension control module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K19 suspension

control module.

6. If all circuits test normal, replace the B161 vertical suspension acceleration sensor. Verify the DTC does not reset. If the DTC resets, replace

the K19 suspension control module

Repair Instructions

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

* Electronic Suspension Front Vertical Accelerometer Replacement - Lower (See: Sensors and Switches/Sensors and Switches - Steering and

Suspension/Sensors and Switches - Suspension/Acceleration Sensor/Service and Repair/Electronic Suspension Front Vertical Accelerometer

Replacement - Lower)

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

2010 Cadillac Truck SRX AWD V6-3.0L Page 266

- All Door Unlatch Circuit Short to Battery

DTC B251A 02

- All Door Unlatch Circuit Short to Ground

DTC B251B 02

- Driver Door Unlatch High Control Circuit Short to Ground

DTC B251B 04

- Driver Door Unlatch High Control Circuit Open

DTC B251C 04

- Passenger Door Unlatch High Control Circuit Open

DTC B251D 04

- Left Rear Door Unlatch High Control Circuit Open

DTC B251E 04

- Right Rear Door Unlatch High Control Circuit Open

Diagnostic Fault Information

Circuit/System Description

The system is designed so that when the operator approaches a locked vehicle with the keyless entry transmitter, the keyless entry control module

will detect the keyless entry transmitter and when an exterior door handle is pulled the keyless entry control module will command all doors to

unlock and the door to unlatch allowing the door to be pulled open.

Conditions for Running the DTC

The system voltage is 9-16 V.

Conditions for Setting the DTC

B251A 01

The keyless entry control module detects a short to voltage on the passenger or left rear or right rear door latch motor unlatch low control circuit.

B251A 02

The keyless entry control module detects a short to ground on the passenger or left rear or right rear door latch motor unlatch low control circuit.

B251A 02

The BCM detects a short to ground on the passenger door lock actuator unlock control circuit.

Wednesday, December 30, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 625

Circuit/System Verification

Verify DTC B3122, B3123, or B3124 is not set.

If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic

Trouble Code (DTC) List - Vehicle).

Circuit/System Testing

Note: The A24P passenger exterior door handle assembly has two harness connectors. Of these two harness connectors, make sure that only

the T10N passenger door handle keyless entry antenna harness connector is disconnected. Disconnecting both harness connectors will result

in the inability to activate the antenna and cause an improper diagnosis.

1. Ignition OFF, disconnect the harness connector at the T10N passenger door handle keyless entry antenna.

2. Ignition ON, test for less than 1 V between the signal circuit terminal 1 and ground.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K84 keyless entry

control module.

3. Ignition OFF, install a DMM between the signal circuit terminal 1 and ground. Set the DMM to capture DC voltage using the MIN MAX

function.

4. Lock the vehicle doors using the keyless entry transmitter.

5. Activate the antenna by pulling the passenger exterior door handle. Verify the MAX voltage captured by the DMM is greater than.5 V.

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

the K84 keyless entry control module.

6. Install a DMM between the signal circuit terminal 1 and the low reference circuit terminal 2. Set the DMM to capture DC voltage using the

MIN MAX function.

7. Lock the vehicle doors using the keyless entry transmitter.

8. Activate the antenna by pulling the passenger exterior door handle. Verify the MAX voltage captured by the DMM is greater than.5 V.

瀚慖f less than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K84

keyless entry control module.

Note: Install the A24P passenger exterior door handle assembly and verify correct system operation BEFORE painting the assembly. If the

assembly does not correct the concern, return the unpainted part.

9. If all circuits test normal, replace the A24P passenger exterior door handle assembly. Verify DTC B3120 is not set.

瀚慖f the DTC is set, replace the K84 keyless entry control module.

Repair Instructions

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

* Front Side Door Outside Handle Replacement (See: Body and Frame/Doors, Hood and Trunk/Doors/Front Door/Front Door Handle/Front

Door Exterior Handle/Service and Repair)

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

and programming

B3121

DTC B3121

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 B3121 02

- Keyless Entry Antenna 3 Short to Ground

2010 Cadillac Truck SRX AWD V6-3.0L Page 582

B2605

DTC B2600 or B2605

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 B2600 01

- Left Daytime Running Lamps Control Circuit Short to Battery

DTC B2600 02

- Left Daytime Running Lamps Control Circuit Short to Ground

DTC B2600 04

- Left Daytime Running Lamps Control Circuit Open

DTC B2605 01

- Right Daytime Running Lamps Control Circuit Short to Battery

DTC B2605 02

- Right Daytime Running Lamps Control Circuit Short to Ground

DTC B2605 04

- Right Daytime Running Lamps Control Circuit Open

Diagnostic Fault Information

Circuit/System Description

When the headlight switch is in the Auto position and the ambient light sensor detects sunlight, the body control module (BCM) will command the

daytime running lamps to illuminate by providing 12 volts to the daytime running lamp control circuit.

Conditions for Running the DTC

* The engine is running.

* Headlamp switch in AUTO position.

* The ambient light is day.

Conditions for Setting the DTC

B2600 01 or B2605 01

The BCM detects a short to voltage on the daytime running lamp control circuit

B2600 02 or B2605 04

The BCM detects a short to ground on the daytime running lamp control circuit

B2600 04 or B2605 04

The BCM detects an open/high resistance on the daytime running lamp control circuit

Action Taken When the DTC Sets

2010 Cadillac Truck SRX AWD V6-3.0L Page 978

DTC P0133, P013A-P013F, P014A, P014B, P0153, P1133, or P1153 (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 P0133

- HO2S Slow Response Bank 1 Sensor 1

DTC P013A

- HO2S Slow Response Rich to Lean Bank 1 Sensor 2

DTC P013B

- HO2S Slow Response Lean to Rich Bank 1 Sensor 2

DTC P013C

- HO2S Slow Response Rich to Lean Bank 2 Sensor 2

DTC P013D

- HO2S Slow Response Lean to Rich Bank 2 Sensor 2

DTC P013E

- HO2S Delayed Response Rich to Lean Bank 1 Sensor 2

DTC P013F

- HO2S Delayed Response Lean to Rich Bank 1 Sensor 2

DTC P014A

- HO2S Delayed Response Rich to Lean Bank 2 Sensor 2

DTC P014B

- HO2S Delayed Response Lean to Rich Bank 2 Sensor 2

DTC P0153

- HO2S Slow Response Bank 2 Sensor 1

DTC P1133

- HO2S Insufficient Switching Bank 1 Sensor 1

DTC P1153

- HO2S Insufficient Switching Bank 2 Sensor 1

Diagnostic Fault Information

2010 Cadillac Truck SRX AWD V6-3.0L Page 1391

Repair Instructions

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

* Spark Plug Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Spark Plug/Service and

Repair)

* 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. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) for DTC P0420 or P0430.

P0302

DTC P0300-P0306 (LF1, LFW)

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 P0300

- Engine Misfire Detected

DTC P0301

- Cylinder 1 Misfire Detected

DTC P0302

- Cylinder 2 Misfire Detected

DTC P0303

- Cylinder 3 Misfire Detected

DTC P0304

- Cylinder 4 Misfire Detected

DTC P0305

- Cylinder 5 Misfire Detected

DTC P0306

- Cylinder 6 Misfire Detected

Circuit/System Description

The engine control module (ECM) uses information from the crankshaft position sensor and the camshaft position sensors in order to determine

when an engine misfire is occurring. By monitoring variations in the crankshaft rotation speed for each cylinder, the ECM is able to detect

individual misfire events. A misfire rate that is high enough can cause 3-way catalytic converter damage. The malfunction indicator lamp (MIL)

will flash ON and OFF when the conditions for catalytic converter damage are present. DTCs P0301 through P0306 correspond to cylinders 1

through 6. If the ECM is able to determine that a specific cylinder is misfiring, the DTC for that cylinder will set, and the corresponding fuel

injector is disabled. The ECM will re-enable the fuel injector after 4 crankshaft revolutions when the misfire is not current. The ECM will re-enable

the fuel injector after 8 crankshaft revolutions when the misfire is not current, if the vehicle is equipped with a manual transmission.

Conditions for Running the DTC

* DTC P0010, P0011, P0013, P0014, P0016, P0017, P0018, P0019, P0020, P0021, P0023, P0024, P0068, P0101, P0102, P0103, P0106,

P0107, P0108, P0112, P0113, P0117, P0118, P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0335, P0336, P0606, P0641, P0651,

P1516, P2101, P2122, P2123, P2127, P2128 or P2176 is not set.

* The engine speed is between 450-6,600 RPM.

* The evaporative emissions (EVAP) leak detection is not active.

* The delivered torque signal is greater than 5 % at idle.

* The delivered torque signal is between 6-29 % with the transmission in drive.

* The engine coolant temperature (ECT) is between -7 and +127掳C (+19 and +261掳F).

* The ECM is not receiving a rough road signal.

* The fuel level is greater than 11 %.

* The antilock brake system (ABS) and the traction control system (TCS) are not active or detecting rough road.

2010 Cadillac Truck SRX AWD V6-3.0L Page 1323

threshold.

P0237

The ECM detects that the boost pressure sensor voltage is less than 0.45 V or the measured pressure is less than 50 kPa (7.3 psi).

P0238

The ECM detects that the boost pressure sensor voltage is greater than 4.65 V or the measured pressure is greater than 300 kPa (43.5 psi).

Action Taken When the DTC Sets

DTCs P0236, P0237, P0238, are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0236, P0237, P0238, are Type B DTCs.

Diagnostic Aids

* Use a solution of dish soap and water in a spray bottle to pinpoint any air leaks.

* The BARO sensor is integrated within the ECM, and it has a port on the housing that allows it to sense the ambient pressure. Any restriction

at this opening may hinder the operation of the BARO sensor.

Reference Information

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

Turbocharger 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 Verification

1. Ignition ON, observe the diagnostic trouble code (DTC) information with a scan tool. Verify that DTCs P0641, P0642, P0643, P2227,

P2228, or P2229 are not set.

瀚慖f any of the above DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) for further diagnosis.

2. Compare the scan tool BARO 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.

3. 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.

2010 Cadillac Truck SRX AWD V6-3.0L Page 342

DTC B317A 02

- Passenger Window Switch Short to Ground

DTC B317A 39

- Passenger Window Switch Internal Malfunction

DTC B318A 02

- Left Rear Window Switch Short to Ground

DTC B318A 39

- Left Rear Window Switch Internal Malfunction

DTC B319A 02

- Right Rear Window Switch Short to Ground

DTC B319A 39

- Right Rear Window Switch Internal Malfunction

Diagnostic Fault Information

Circuit/System Description

When a window switch is pressed on the driver window switch, a serial data message is sent to the body control module (BCM). The BCM

examines the request and checks for messages from other power window motors prohibiting the window movement. If no prohibitive messages

have been received, the BCM will send a serial data message to the passenger window motor or to the appropriate rear window switch which will

perform the command as requested.

Conditions for Running the DTC

Battery voltage must be between 9-16 V.

Conditions for Setting the DTC

B316B 00

The BCM has detected the driver right front or left rear or right rear window switch is active for greater than 60 seconds.

B316B 02

The BCM has detected the driver left front window switch is active for greater than 60 seconds.

B317A 02

The BCM has detected the passenger window switch is active for greater than 60 seconds.

B318A 02

The BCM has detected the left rear window switch is active for greater than 60 seconds

B319A 02

The BCM has detected the right rear window switch is active for greater than 60 seconds

B316B 39, B317A 39, B318A 39, B319A 39

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1282

Circuit/System Description

The engine control module (ECM) supplies voltage to each fuel injector on the injector high voltage supply circuits. The ECM energizes each fuel

injector by grounding the high voltage control circuit of the fuel injector. The ECM monitors the status of the injector high voltage supply circuits

and the fuel injector high voltage control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) is

disabled.

Conditions for Running the DTC

* The engine is running.

* The ignition voltage is between 11-18 V.

* The DTCs run continuously when the above conditions are met.

Conditions for Setting the DTC

P2147, P2150, P2153, P2156, P216B, or P216E

The ECM detects the injector high voltage supply circuit is shorted to ground for greater than 2 s.

P2148, P2151, P2154, P2157, P216C, or P216F

The ECM detects the injector high voltage supply circuit is shorted to voltage for greater than 2 s.

Action Taken When the DTC Sets

DTCs P2147, P2148, P2150, P2151, P2153, P2154, P2156, P2157, P216B, P216C, P216E, and P216F are Type A DTCs.

Conditions for Clearing the DTC

DTCs P2147, P2148, P2150, P2151, P2153, P2154, P2156, P2157, P216B, P216C, P216E, and P216F are Type A DTCs.

Diagnostic Aids

* Performing the fuel injector coil test may help isolate an intermittent condition. Refer to 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).

* If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool Injector

Control Circuit Status parameters. An Injector Control Circuit Status parameter will change from OK or Not Run to Fault if there is a

condition with the circuit or a connection.

2010 Cadillac Truck SRX AWD V6-3.0L Page 202

10. If all circuits test normal, replace the S38 ignition mode switch.

Component Testing

1. Ignition OFF, disconnect the harness at the S38 ignition mode switch.

2. Place a jumper wire between ignition mode switch terminal 4 and ground.

3. Place a fused jumper wire between the circuit terminals of the ignition mode switch listed below and B+:

* Ignition mode switch terminal 2

* Ignition mode switch terminal 5

瀚慖f the either LED does not light, replace the S38 ignition mode switch.

4. Without the button pressed, test for 4,870 ohm between the ignition mode switch terminals listed below:

* Ignition mode switch terminals 3 and 7

* Ignition mode switch terminals 4 and 6

瀚慖f not the specified value, replace the S38 ignition mode switch.

5. With the button pressed, test for 1,300 ohm between the ignition mode switch terminals listed below:

* Ignition mode switch terminals 3 and 7

* Ignition mode switch terminals 4 and 6

瀚慖f not the specified value, replace the S38 ignition mode switch.

Repair Instructions

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

* Ignition and Start Switch Replacement (See: Powertrain Management/Ignition System/Sensors and Switches - Ignition System/Ignition

Switch/Service and Repair)

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

Remote Functions

DTC B097B

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 B097B 02

- Power Mode Start Switch Circuit Short to Ground

DTC B097B 05

- Power Mode Start Switch Circuit High Voltage/Open

DTC B097B 08

- Power Mode Start Switch Circuit Performance - Signal Invalid

DTC B097B 61

- Power Mode Start Switch Circuit Stuck

Circuit/System Description

Note: Depending on the vehicle build date and BCM software level, the method to place the vehicle in the run mode will be different. Early

vehicles that have not had the BCM replaced or reprogrammed will require two presses of the igniting mode switch to enter run mode. Late

vehicles and vehicles that have had the BCM replaced or reprogrammed require the ignition mode switch be pressed and held for 5 seconds to enter

2010 Cadillac Truck SRX AWD V6-3.0L Page 362

* Whenever the liftgate control module loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the

liftgate control module.

Reference Information

Schematic Reference

Liftgate Schematics (See: Body and Frame/Locks/Diagrams/Electrical Diagrams/Liftgate Schematics)

Connector End View Reference

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

Description and Operation

Liftgate Description and Operation (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Description and Operation/Liftgate)

Electrical Information Reference

* 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)

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

Testing/Circuit Testing)

* 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

1. Ignition ON, verify the scan tool Liftgate Mode Switch parameter changes from 125 counts to 350 counts to 245 counts while rotating the

S45B liftgate control switch - interior.

瀚慖f the value does not change with each position selected, refer to OFF/ 3/4 position/MAX Switch Circuit Test

2. Place the S45B liftgate control switch - interior to the OFF position.

3. Observe the scan tool Liftgate Front Control Switch parameter while pressing and releasing the liftgate button on the S45B liftgate control

switch-interior. The parameter should change between Inactive and Active.

瀚慖f the value does not change, refer to Open/Close Switch Circuit Test

Circuit/System Testing

OFF/ 3/4 position/MAX Switch Circuit Test

1. Ignition OFF, disconnect the harness connector at the S45B liftgate control switch-interior.

2. 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 a open/high resistance.

3. Ignition ON, verify the scan tool Liftgate Mode Switch parameter is greater than 300 counts.

瀚慖f less than the specified range, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the K39 liftgate

module.

4. Install a 3A fused jumper wire between the signal circuit terminal 3 and ground, verify the scan tool Liftgate Mode Switch parameter is less

than 5 counts.

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

replace the K39 liftgate module.

5. If all circuits test normal, test or replace the S45B liftgate control switch-interior.

Open/Close Switch Circuit Test

1. Ignition OFF, disconnect the harness connector at the S45B liftgate control switch-interior.

2. 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 a open/high resistance.

3. Ignition ON, verify the scan tool Liftgate Front Control Switch parameter is Inactive.

2010 Cadillac Truck SRX AWD V6-3.0L Page 844

1. Connect a test lamp and ammeter in series between both Q37 shock absorber actuator harness connector control circuit terminals.

2. Ignition ON, with a scan tool, attempt to clear all K19 suspension control module DTC's (codes may not clear).

3. With a scan tool, command the Damper Actuator to Increase the amperage to approximately 400 mA and Decrease to 0 mA while comparing

the ammeter displayed values and scan tool Damper Actuator Command parameter displayed values. Verify the following:

* The test lamp is illuminated.

* The ammeter displayed values and scan tool Damper Actuator Command parameter displayed values change and are simultaneously

within 15 mA of each other.

瀚慖f the test lamp is not illuminated and/or the values are not within the specified range, test both control circuits for a short to voltage, short

to ground, or open/high resistance. If all circuits test normal, replace the K19 suspension control module.

4. If all circuits test normal, test or replace the Q37 shock absorber actuator.

Component Testing

Static Test

1. Ignition OFF, disconnect the harness connector at the appropriate Q37 shock absorber actuator.

2. Test for 2-3 ohm between the Q37 shock absorber actuator control terminals.

瀚慖f not within the specified range, replace the Q37 shock absorber actuator.

Repair Instructions

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

* Strut, Strut Component, or Spring Replacement (See: Steering and Suspension/Suspension/Suspension Spring ( Coil / Leaf )/Service and

Repair/Front Suspension Coil Spring)

* Shock Absorber Replacement (See: Steering and Suspension/Suspension/Suspension Strut / Shock Absorber/Service and Repair/Rear

Suspension Shock Absorber)

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

and programming

C0590

DTC C0575, C0580, C0585, or C0590

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 C0575 02

- Left Front Damper Actuator Circuit Short to Ground

DTC C0575 04

- Left Front Damper Actuator Circuit Open

DTC C0575 0F

- Left Front Damper Actuator Circuit Signal Erratic

DTC C0580 02

- Right Front Damper Actuator Circuit Short to Ground

DTC C0580 04

- Right Front Damper Actuator Circuit Open

DTC C0580 0F

- Right Front Damper Actuator Circuit Signal Erratic

DTC C0585 02

- Left Rear Damper Actuator Circuit Short to Ground

1400 HP 2021 Ford Mustang Mach-E Review - Car and Driver more detail i...

2010 Cadillac Truck SRX AWD V6-3.0L Page 265

Power Door Latch Description and Operation (See: Body and Frame/Locks/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 OFF, with the doors closed and locked, approach the vehicle with the keyless entry transmitter and pull the exterior driver door handle. The

driver door should unlock and unlatch allowing the driver door to be pulled open.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the A23D door latch assembly-driver.

2. Connect a test lamp between control circuit terminal 10 and ground.

3. Ignition ON, command the door to UNLATCH by lifting the driver exterior door handle. The test lamp should illuminate during the

UNLATCH command.

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 K84 keyless entry

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 K84 keyless entry control module.

4. Connect a test lamp between control circuit terminal 5 and B+.

5. Command the door to UNLATCH by lifting the driver exterior door handle. The test lamp should illuminate during the UNLATCH

command.

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 K84 keyless entry

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 K84 keyless entry control module.

6. If all circuits test normal, test or replace the A23D door latch assembly-driver.

Repair Instructions

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

* Front Side Door Lock Replacement (See: Body and Frame/Locks/Door Locks/Service and Repair/Front Side Door Lock Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for the keyless entry control module replacement,

setup, and programming

B251A

DTC B251A-B251F

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.

2010 Cadillac Truck SRX AWD V6-3.0L Page 1222

* 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)

* Heated Oxygen Sensor Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical

Diagnostic Procedures/Wiring Repairs/Heated Oxygen Sensor Wiring 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

1. Ignition ON, observe the DTC information with a scan tool. Verify no B52 HO2S heater DTCs are set.

瀚慖f a B52 HO2S heater DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).

2. Engine running, observe the appropriate scan tool B52 HO2S voltage parameter. The reading should be within the range of 50-1,050 mV.

3. 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. Ignition OFF, disconnect the appropriate B52 HO2S harness connector.

2. Ignition ON, observe the appropriate scan tool HO2S voltage parameter. The parameter should display 1.27 V.

瀚慖f less than the specified range, test the high and low signal circuits for a short to ground. If both signal circuit test normal, replace the

K20 ECM.

3. Ignition ON, test for 2.5-3.0 V between the high signal circuit terminal B and ground.

瀚慖f less than the specified range, test the high signal circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.

瀚慖f greater than the specified range, test the high signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

4. Ignition OFF, connect a 3 A fused jumper wire between the high signal circuit terminal B and the low signal circuit terminal A.

Note: The low signal circuit is tied to a pull-up circuit within the ECM. A voltage of 0.90-1.10 V on the low signal circuit is normal.

5. Ignition ON, verify the scan tool HO2S parameter displays 0.0 V.

瀚慖f greater than the specified range, test the low signal circuit for an open/high resistance or for a short to voltage. If the circuit tests

normal, replace the K20 ECM.

6. If all circuits test normal, test or replace the appropriate B52 HO2S.

Repair Instructions

Caution: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution (See: Powertrain Management/Computers and Control

Systems/Oxygen Sensor/Service Precautions/Heated Oxygen Sensor Resistance Learn Reset Caution).

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

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 1 Sensor 1)

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 1 Sensor 2)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 2 Sensor 1)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 2 Sensor 2)

Monday, December 28, 2020

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