2010 Cadillac Truck SRX FWD V6-3.0L Page 802

2010 Cadillac Truck SRX FWD V6-3.0L Page 802

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

C0277 06, C0277 07, C0890 03, C0890 07

1. Ignition OFF, disconnect the harness connector at the B22 brake pedal position sensor.

2. Ignition OFF, test for less than 60 ohm between the low reference circuit terminal C and ground.

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

normal, replace the K9 BCM.

3. 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 K9 BCM.

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 K9 BCM.

4. Verify that the scan tool Brake Pedal Position Sensor parameter is less than 0.3 V.

瀚慖f greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the K9 BCM.

5. Connect a 3 A fused jumper wire between the 5 V reference circuit terminal A and the signal circuit terminal B. Verify that the scan tool

Brake Pedal Position Sensor parameter is 4.8-5.2 V

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

K9 BCM.

6. If all circuits test normal, test or replace the B22 brake pedal position sensor.

C0277 09

1. Replace the B22 BPP sensor.

2. Perform the BPP sensor recalibration procedure. Refer to Brake Pedal Position Sensor Calibration ().

3. Operate the vehicle within the Conditions for Running and Setting the DTC and verify the DTC does not reset.

瀚慖f the DTC resets, replace the K9 BCM.

C0277 4B

1. Verify that the DTC sets under the Conditions for Running and Setting.

2. Perform the BPP sensor recalibration procedure. Refer to Brake Pedal Position Sensor Calibration ().

3. Operate the vehicle within the conditions that the customer experienced and verify the DTC does not reset.

瀚慖f the DTC resets, replace the B22 BPP sensor.

Repair Instructions

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

* Brake Pedal Position Sensor Calibration ()

* Brake Pedal Position Sensor Replacement ()

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

C0280

DTC C0280

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.