2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 472

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 472

* 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

1. Ignition OFF, disconnect the KR104A battery saver relay.

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

3. Enable and disable the batter saver mode. The test lamp should turn ON and OFF when changing the relay latch positions.

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 open/high resistance. If the circuit tests normal, replace the

K9 BCM.

4. If all circuits test normal, test or replace the KR104A battery saver 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, programming and setup

B1516

DTC B1516

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 B1516 08

- Battery Current Sensor Signal Invalid

DTC B1516 66

- Battery Current Sensor Wrong Mounting Position

Diagnostic Fault Information

Circuit/System Description

The battery current sensor is a 3-wire hall effect current sensor. The body control module (BCM) supplies 5 V and ground to the battery current

sensor. The battery current sensor measures the amount of current flowing to or from the battery, and supplies a pulse width modulation (PWM)

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 376

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 376

* 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 B023A 02 is not present.

瀚慖f DTC is present, refer to Actuator Power Supply Malfunction.

2. Verify that DTC B0223, B022A, B0233, B0408 or B0418 is not set.

瀚慖f DTC is present, refer to Actuator Malfunction.

Circuit/System Testing

Actuator Power Supply Malfunction

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

2. Ignition ON, verify that a test lamp illuminates between the 12 volt referance circuit terminal 2 and ground.

瀚慖f the test lamp does not illuminate, test the 12 volt referance circuit for a short to ground or an open/high resistance. If the circuit tests

normal test or replace the K33 HVAC control module.

Actuator Malfunction

1. Ignition OFF, disconnect the X3 and X4 harness connector at the K33 HVAC Control Module.

2. Ignition ON, test for 80-200 ohm between the 12 V reference voltage circuit terminal 15 X3 and each control circuit terminal of the

appropriate actuator.

瀚慖f less than the specified range, test for the 12 V reference voltage circuit and the control circuit for a short circuit. If the circuits test

normal, replace the appropriate actuator.

瀚慖f greater than the specified range, test the 12 V reference voltage circuit and the control circuit for an open/high resistance. If the circuits

test normal, replace the appropriate actuator.

3. If all circuits test normal, replace the K33 HVAC Control Module

Repair Instructions

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

* HVAC Component Replacement Reference (See: Heating and Air Conditioning/Service and Repair/Removal and Replacement)

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

programming

B0428

DTC B0223, B022A, B0233, B023A, B0408, B0418, B0428, or B3531

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 V6-2.8L Turbo Page 356

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 356

* 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 function of the trailer tail lamps while commanding the Trailer Park Lamps ON and OFF with a scan tool. The trailer tail

lamps should turn ON and OFF while changing between the commanded states.

Circuit/System Testing

1. Ignition OFF, disconnect the trailer park lamp relay.

2. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 86 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.

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

4. Command the Trailer Park 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 OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace

the K9 BCM.

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

5. If all circuits test normal, test or replace the trailer park lamp relay.

Component Testing

Relay Test

1. Ignition OFF, disconnect the trailer park lamp relay.

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

瀚慖f not within the specified range, replace the trailer park lamp 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 trailer park lamp relay.

4. Install a 5 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 2 ohm between terminals 30 and 87.

瀚慖f greater than the specified range, replace the trailer park lamp 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, programming and setup

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 3007

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 3007

* 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

1. Ignition OFF, disconnect the harness connector of the yaw rate sensor.

2. Ignition ON, verify that a test lamp illuminates between the module voltage circuit and ground.

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

EBCM.

3. Ignition OFF, test for less than 5 ohms between the module ground circuits and ground.

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

4. If all circuits test normal, replace the yaw rate sensor.

Repair Instructions

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

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

Procedures/Wiring Repairs/GMLAN Wiring Repairs)

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

Operation/ABS Description and Operation) for the ABS - Hybrid

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Less than 3900 kg

(8600 lb) GVW

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Greater than/Equal to

3900 kg (8600 lb) GVW

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

U2164

DTC U2105-U2199

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 U2142 00

- Lost Communication With Yaw Rate Sensor (YRS)

Circuit/System Description

Modules connected to the CAN bus serial data circuits monitor for serial data communications during normal vehicle operation. Operating

information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be

exchanged on the serial data circuits. The messages are supervised and also, some periodic messages are used by the receiver module as an

availability indication of the transmitter module. Each message contains the identification number of the transmitter module.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 824

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 824

* 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

Engine running, observe the scan tool Rear Drive Clutch Status parameter. The scan tool should display TEMPORARILY LIMITED when

stationary.

Circuit/System Testing

Important: The rear drive clutch solenoid valve is calibrated with and is part of the rear differential clutch control module. Both

components must be replaced as a matched set.

1. Ignition OFF, disconnect the X2 harness connector at the K47 rear differential clutch control module.

2. Test for a infinite resistance between the control circuit terminal 3 and ground.

瀚慖f not the specified value, test the control circuit for a short to ground. If a short to ground is present, replace the M32 differential clutch

pump/harness assembly. If the circuit tests normal, replace the Q49 rear differential clutch solenoid valve.

3. Test for 2-4 ohm between the control circuit terminal 3 and the ground reference circuit terminal 4.

瀚慖f not within the specified range, replace the Q49 rear differential clutch solenoid valve.

4. Replace the K47 rear differential clutch control module.

C0408 61

1. Replace the Q49 rear differential clutch solenoid valve.

2. Ignition ON, verify the DTC does not reset.

瀚慖f the DTC resets, replace the K47 rear differential clutch control module.

Repair Instructions

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

* Limited Slip Differential Clutch Valve Replacement ()

* Differential Clutch Pump Replacement (See: Transmission and Drivetrain/Differential Assembly/Differential Clutch/Service and

Repair/Differential Clutch Pump Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for rear differential clutch control module

replacement, setup, and programming

C0450

DTC C0450

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 C0450 00

- Steering Assist Control Solenoid Valve Circuit Malfunction

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 638

2010 Cadillac Truck SRX AWD V6-2.8L Turbo 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.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 795

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 795

* 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)

Circuit/System Testing

1. Ignition ON, verify that DTC C0800 is not present.

瀚慖f DTC C0800 is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

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

2. Verify that DTC C0186 5A, C0196 00, C0196 5A, C019B 5A, C0287 4B, and C0287 5A is not present.

瀚慖f any listed DTC is present, perform the Multi-Axis Acceleration Sensor Module Programming and Setup (See: Brakes and Traction

Control/Antilock Brakes / Traction Control Systems/Yaw Rate Sensor/Testing and Inspection/Multi-Axis Acceleration Sensor Module

Programming and Setup) and the Vehicle Yaw Sensor Learn (See: Brakes and Traction Control/Antilock Brakes / Traction Control

Systems/Yaw Rate Sensor/Testing and Inspection/Vehicle Yaw Sensor Learn).

3. Inspect the B119 Multi-axis Acceleration Sensor for correct installation.

瀚慖f loose or incorrect installation is diagnosed, correct the installation of the component and perform the Vehicle Yaw Sensor Learn (See:

Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Yaw Rate Sensor/Testing and Inspection/Vehicle Yaw Sensor

Learn).

4. Ignition OFF, disconnect the harness connector at the B119 Multi-axis Acceleration Sensor.

5. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 10 ohm

between the ground circuit terminal 6 and ground.

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

6. Ignition ON, test for greater than 10 V between the 12 V reference circuit terminal 5 and ground.

瀚慖f less than the specified value, test the 12 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K17 Electronic Brake Control Module (EBCM).

7. If all circuits test normal, replace the B119 Multi-axis Acceleration Sensor and verify the DTC does not reset.

瀚慖f the DTC resets, replace the K17 Electronic Brake Control Module (EBCM).

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests)

* Vehicle Yaw Sensor with Vehicle Lateral and Longitudinal Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes

/ Traction Control Systems/Yaw Rate Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM or Multi-axis Acceleration Sensor

replacement, programming and setup

C0196

DTC C0186, C0196, C019B, or C0287

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 V6-2.8L Turbo Page 635

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 635

* 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.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 641

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 641

* 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.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 161

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 161

* 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

Replace the S3 Automatic Transmission Shift Lever and verify that the DTC does not reset.

If the DTC resets, replace the K9 Body Control Module.

Repair Instructions

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

* Automatic Transmission Range Selector Lever Replacement (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Shift

Linkage/Service and Repair) for MXE

* Automatic Transmission Range Selector Lever Replacement (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Shifter

A/T/Service and Repair/6T70/6T75 - Automatic Transmission/Automatic Transmission Range Selector Lever Replacement) for MH2, MH4

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

B0074

DTC B0074

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 B0074 00

- Passenger Presence Sensor Circuit Malfunction

DTC B0074 04

- Passenger Presence Sensor Open

Circuit/System Description

The passenger presence module monitors the sensor status continually. Whenever the sensor mat has an internal malfunction, the passenger

presence module will set DTC B0074.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

B0074 00

The passenger presence module has detected a disconnection from the sensor mat.

B0074 04

The passenger presence module has detected an open circuit.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 164

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 164

* 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)

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

Procedures/Connector Repairs/Connector Repairs)

* 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

Note:

* This system is serviced as a kit (seat foam, module and/or sensing mat). Perform a Passenger Presence System Preload procedure whenever a

component is replaced. Refer to Passenger Presence System Preload Test (See: Restraints and Safety Systems/Air Bag Systems/Description

and Operation/Passenger Presence System Preload Test).

* Both SDM and Passenger Presence Module set DTC B0081 but with different symptom bytes. Therefore it is important to identify which

module has set the DTC B0081. Use the symptom bytes as a way of identify the correct module to diagnose.

1. Verify that DTC B1001 is not set in the SDM.

瀚慖f the DTC is set in the SDM, refer to DTC B1001 (See: B Code Charts/B1001/Supplemental Inflatable Restraints).

2. Verify that DTC B0074, B101D, or B101E is not set in the passenger presence module.

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

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

Note: The SDM sets a redundant B0081 00 DTC when the passenger presence module sets a DTC B0081 11 or B0081 4B.

3. Verify that DTC B0081 00 is not set in the SDM

瀚慖f DTC B0081 00 is set in the SDM, then the passenger presence module has set a B0081 11 or a B0081 4B. Refer to B0081 (Passenger

Presence Module) for diagnosis.

Note: The SDM sets a B0081 3A when an incorrect passenger presence module is installed.

4. Verify that DTC B0081 3A is not set in the SDM.

瀚慖f DTC B0081 3A is set in the SDM, replace the K85 passenger presence module.

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 passenger presence module and SDM replacement,

setup, and programming

Passenger Presence Detection Module

DTC B0081 (Passenger Presence Detection Module)

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 B0081 11

- Passenger Presence Module High Input

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 606

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 606

* 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 BCM Hood Ajar Switch parameter. With the hood open, the Hood Ajar Switch parameter should be Open. With

the hood closed, the Hood Ajar Switch parameter should be Closed.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B55 hood ajar switch.

2. Ignition OFF, test for less than 5 ohm between the ground circuit terminal C and ground.

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

3. Ignition ON, verify DTC B3006 04 is set as current.

瀚慖f DTC B3006 01 is set as current, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.

瀚慖f DTC B3006 02 is set as current, test the signal circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.

4. Install a 5 A fused jumper wire between the signal circuit terminal B and ground. Verify DTC B3006 02 is set as current.

瀚慖f DTC B3006 04 is set as current, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the K9 BCM.

5. If all circuits test normal, test or replace the B55 hood ajar switch.

Repair Instructions

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

* Hood Primary and Secondary Latch Replacement

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

B3031

DTC B3031

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 B3031 00

- Security Controller In Learn Mode Malfunction

Circuit/System Description

When learning a coded key, the body control module (BCM) is placed in learn mode. DTC B3031 will set automatically as an indicator that the

system is in learn mode and not as a fault indicator. Once the coded key is learned, learn mode will be exited and the DTC cleared. If the BCM does

not exit learn mode, B3031 will remain current and indicate a fault. The instrument cluster security indicator will illuminate and the driver

information center will display a message.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 59

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 59

* 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

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

Note: 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 anchor pretensioner

* SDM

* Seat belt anchor pretensioner 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. Observe the scan tool Deployment Loop Resistance parameters. The reading should be between 2.1 and 4.0 ohm.

瀚慖f not within the specified range, refer to Circuit/System Testing.

2. Observe the scan tool Deployment Loop Resistance parameters while moving the harness near each connector listed below. The reading

should stay consistently between 2.1 and 4.0 ohm without any drop outs or spikes.

* F113 Seat belt anchor pretensioner

* Any harness inline

* K36 SDM

瀚慖f the reading is erratic while moving the harness, perform the following:

* Inspect each connector terminal for damage or corrosion and repair as necessary.

* Apply Nyogel lubricant 760G to each connector terminal.

* Insure each connector and CPA is correctly seated.

Circuit/System Testing

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

Note: 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 anchor pretensioner

* SDM

* Seat belt anchor pretensioner 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. Ignition OFF, disconnect the harness connector at the appropriate F113 seat belt anchor pretensioner.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 255

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 255

* 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

1. Ignition OFF, disconnect the X1 harness connector at the K8 Blower Motor Control Module.

2. Test for less than 5 ohm between the ground circuit X1 terminal 5 and ground.

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

3. Ignition ON, verify that a test lamp illuminates between the B+ circuit X1 terminal 6 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.

4. Connect a DMM between the control circuit X1 terminal 3 and B+.

5. Cycle the blower motor from OFF to HIGH. The voltage should increase while changing between the commanded states.

瀚慖f voltage remains greater than 11.5 V while changing between the commanded states, test the control circuit for a short to voltage. If the

circuit test normal, replace the K33 HVAC Control Module.

瀚慖f voltage remains less than 1.0 V while changing between the commanded states, test the control circuit for a short to ground or an

open/high resistance. If the circuit tests normal, replace the K33 HVAC Control Module.

瀚慖f voltage is between 1.0-11.5 V and does not increase when changing between the commanded states, replace the K33 HVAC Control

Module.

6. Ignition OFF, connect the X1 harness connector at the K8 Blower Motor Control Module and disconnect the harness connector at the M8

Blower Motor.

7. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 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, replace

the K8 Blower Motor Control Module.

8. Connect a test lamp between the B+ circuit terminal 2 and the control circuit terminal 1.

9. Turn the blower motor on high speed then to low speed. The test lamp intensity should be bright when in high speed and very dim or off

when the blower is on low speed.

瀚慖f the test lamp intensity does not vary, test the control circuit for a short to voltage, short to ground, or an open/high resistance. If the

circuit tests normal, replace the K8 Blower Motor Control Module.

10. If all circuits test normal, replace the M8 Blower Motor.

Repair Instructions

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

* HVAC Component Replacement Reference (See: Heating and Air Conditioning/Service and Repair/Removal and Replacement)

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

programming

B0233

DTC B0223, B022A, B0233, B023A, B0408, B0418, B0428, or B3531

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