2010 Cadillac Truck SRX AWD V6-3.0L Page 1361

2010 Cadillac Truck SRX AWD V6-3.0L Page 1361

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 once the above conditions are met.

Conditions for Setting the DTC

P0201, P0202, P0203, P0204, P0205, or P0206

The ECM detects the injector high voltage supply circuit or the injector high voltage control circuit is open for greater than 2 s.

P0261, P0264, P0267, P0270, P0273, or P0276

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

P0262, P0265, P0268, P0271, P0274, or P0277

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

Action Taken When the DTC Sets

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

are Type A DTCs.

Conditions for Clearing the DTC

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

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)

2010 Cadillac Truck SRX AWD V6-3.0L Page 999

2010 Cadillac Truck SRX AWD V6-3.0L Page 999

DTCs P0133, P013A, P013B, P013C, P013D, P013E, P013F, P014A, P014B, P0153, P1133, and P1153 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0133, P013A, P013B, P013C, P013D, P013E, P013F, P014A, P014B, P0153, P1133, and P1153 are Type B DTCs.

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)

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)

* 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)

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. Verify none of the following conditions exist:

* Lean or rich fuel injectors-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).

* Water intrusion in the B52 HO2S harness connector

* Low or high fuel system pressure-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 (LAU Except China) (See: Powertrain Management/Fuel Delivery and Air

Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (Except China)).

* Fuel that is contaminated-Refer to Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool) (See: Powertrain Management/Fuel Delivery

and Air Induction/Fuel/Testing and Inspection/Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool))Alcohol/Contaminants-in-Fuel

Diagnosis (Without Special Tool) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component

Tests and General Diagnostics/Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)).

* Fuel saturation of the evaporative emission (EVAP) canister

* Exhaust leaks near the B52 HO2S

* Engine vacuum leaks

* Engine oil consumption-Refer to Oil Consumption Diagnosis (See: Engine, Cooling and Exhaust/Engine/Testing and

Inspection/Component Tests and General Diagnostics/Oil Consumption Diagnosis).

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2010 Cadillac Truck SRX AWD V6-3.0L Page 340

Conditions for Clearing the DTC

B316B 00, B316B 02, B317A 02, B318A 02, B319A 02

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

* The DTC will change from current to history when the fault is no longer present.

* A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

B316B 39, B317A 39, B318A 39, B319A 39

If the DTC is current, the affected window switch must be replaced before the DTC can be cleared.

Reference Information

Schematic Reference

Moveable Window Schematics (See: Windows and Glass/Windows/Diagrams/Electrical Diagrams)

Connector End View Reference

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

Description and Operation

Power Windows Description and Operation (See: Windows and Glass/Windows/Description and Operation/Power Windows)

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. Ignition ON, verify that each of the scan tool parameters listed below are Inactive:

* Front Passenger Main Control Down Switch

* Front Passenger Main Control Express Switch

* Front Passenger Main Control Up Switch

* Left Rear Window Main Control Down Switch

* Left Rear Window Main Control Express Switch

* Left Rear Window Main Control Up Switch

* Right Rear Window Main Control Down Switch

* Right Rear Window Main Control Express Switch

* Right Rear Window Main Control Up Switch

瀚慖f any of the parameters are always Active, replace the S79D window switch-driver.

2. Verify that the scan tool Left Rear Window Switch at Door parameter is Inactive.

瀚慖f not the specified value, replace the S79LR window switch-left rear.

3. Verify that the scan tool Right Rear Window Switch at Door parameter is Inactive.

瀚慖f not the specified value, replace the S79RR window switch-right rear.

4. Command the driver window to go UP, DOWN, express UP and express DOWN by using the S79D window switch-driver. The driver

window should perform the UP, DOWN, express UP and express DOWN functions.

瀚慖f the driver window does not perform as specified, refer to Driver Window Switch Malfunction.

5. Command the passenger window to go UP, DOWN, express UP and express DOWN by using the S79P window switch-passenger. The

passenger window should perform the UP, DOWN, express UP and express DOWN function.

瀚慖f the passenger window does not perform as specified, refer to Passenger Window Malfunction.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 237

Circuit/System Description

The outside rearview mirror switch is a multiplex switch which signals the left mirror control module which outside rearview mirror to move

(driver or passenger) and which direction to move it. The left mirror control module and the passenger window switch are on a serial data circuit

with the memory seat module as the master. The mirror select and directional control switches are inputs to the left mirror control module. When

the memory seat module receives the switch inputs from the left mirror control module, mirror output commands are sent to the appropriate switch

through the serial data circuit. The left mirror control module and passenger window switch control the left and right outside rear view mirrors

through bi-directional motor control circuits. The motor control circuits are floating while in an inactive state and the switches will apply power and

ground to the control circuits as necessary to move the mirror in the commanded direction.

Mirror position is determined by both horizontal and vertical position sensors in each of the power mirrors. The left mirror control module and

passenger window switch supply a 5 V reference, low reference, and horizontal and vertical position signal circuits to these sensors. The signal

circuits are referenced from 5 V by the switches and the signal circuit voltage levels represent the mirror positions. The mirror positions are sent to

the memory seat module through the serial data circuit where they are stored for memory mirror operation. When the memory seat module receives

a memory recall command, the memory seat module will send the go to position commands to the left mirror control module and passenger window

switch. The switches will then drive the appropriate mirror motors to the commanded position sensor settings.

Conditions for Running the DTC

Battery voltage must be between 9-16 V.

Conditions for Setting the DTC

B154A 39

The left mirror control module has determined that a hardware or software error has occurred.

B154B 39

The passenger window switch has determined that a hardware or software error has occurred.

Action Taken When the DTC Sets

Power mirror functions are suspended as long as the fault is present.

Conditions for Clearing the DTC

* A current DTC will clear when the fault is no longer present.

* A history DTC will clear after 40 fault free ignition cycles.

Reference Information

Schematic Reference

Outside Rearview Mirror Schematics (See: Body and Frame/Mirrors/Diagrams/Electrical Diagrams/Outside Rearview Mirror Schematics)

Connector End View Reference

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

Description and Operation

Outside Mirror Description and Operation (without AAB) (See: Body and Frame/Mirrors/Description and Operation/Outside Mirror Description

and Operation (without AAB))Outside Mirror Description and Operation (With AAB) (See: Body and Frame/Mirrors/Description and

Operation/Outside Mirror Description and Operation (With AAB))

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

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2010 Cadillac Truck SRX AWD V6-3.0L Page 94

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 638

* 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, command the doors to LOCK and UNLOCK by using the central door lock switch, all doors should LOCK and UNLOCK while

changing between the commanded states.

Circuit/System Testing

1. Ignition OFF, disconnect the X2 harness connector at the K9 BCM

2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 4 and ground.

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

B+ circuit fuse is open, replace the K9 BCM.

3. Ignition OFF, disconnect the X6 harness connector at the K9 BCM.

4. Disconnect the X2 and X3 harness connectors at the X53 fuse block-rear

5. Test for 5-20 ohm between the control circuit terminal 4 X6 at the K9 BCM and control circuit terminal 36 X2 at the X53 fuse block-rear.

瀚慖f less than the specified range, test either control circuit for a short to ground. If the circuits test normal, test or replace the appropriate

A23 door latch assembly.

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

test or replace the appropriate A23 door latch assembly.

6. Test for 5-20 ohm between the control circuit terminal 4 X6 at the K9 BCM and control circuit terminal 28 X2 at the X53 fuse block-rear.

瀚慖f less than the specified range, test either control circuit for a short to ground. If the circuits test normal, test or replace the appropriate

A23 door latch assembly.

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

test or replace the appropriate A23 door latch assembly.

7. Test for 5-20 ohm between the control circuit terminal 4 X6 at the K9 BCM and control circuit terminal 16 X3 at the X53 fuse block-rear.

瀚慖f less than the specified range, test either control circuit for a short to ground. If the circuits test normal, test or replace the A23D door

latch assembly-driver.

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

test or replace the A23D door latch assembly-driver.

8. Test for 5-20 ohm between the control circuit terminal 4 X6 at the K9 BCM and control terminal 17 X3 at the X53 fuse block-rear (If

equipped).

瀚慖f less than the specified range, test either control circuit for a short to ground. If the circuits test normal, test or replace the appropriate

A23 door latch assembly.

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

test or replace the appropriate A23 door latch assembly.

9. Test for 5-20 ohm between the control circuit terminal 2 and control circuit terminal 4 at the K9 BCM.

瀚慖f less than the specified range, test either control circuit for a short to ground. If the circuits test normal, replace the X53 fuse block-rear.

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

replace the X53 fuse block-rear.

10. Test for 5-20 ohm between the control circuit terminal 1 and control circuit terminal 4 at the K9 BCM.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 551

To prevent false reading when testing the center coax terminals, use care not to ground the test probe on the outer housing/shield.

Coax Cable Test

1. Ignition OFF, disconnect the coax cable at both components.

2. Test for less than 5 ohm between both ends of the coax cables center terminals.

瀚慖f greater than the specified range, replace the coax cable

3. Test for greater than 10k ohm between the coax cable center wire and the outer coax shield.

瀚慖f less than the specified range, replace the coax cable.

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

B2470

DTC B2470

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 B2470 04

- Cellular Phone Antenna Circuit Open Circuit

Circuit/System Description

The cellular phone antenna is connected to the telematics communication interface control module with a RG-58 coax cable. The telematics

communication interface control module polls the data from the cellular phone antenna once every second.

Conditions for Running the DTC

* Ignition in the RUN or ACC position.

* System voltage is between 9.5 V and 15.5 V.

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

Conditions for Setting the DTC

The telematics communication interface control module does not detect the presence of a cellular phone antenna.

Action Taken When the DTC Sets

* The vehicle is unable to connect to the OnStar(R) Call Center.

* The OnStar(R) status LED turns red.

Conditions for Clearing the DTC

* The telematics communication interface control module detects the presence of a cellular phone antenna.

* A history DTC clears after 50 malfunction-free ignition cycles.

Reference Information

Schematic Reference

OnStar Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/OnStar Schematics)