2010 Cadillac Truck SRX FWD V6-3.0L Page 800

2010 Cadillac Truck SRX FWD V6-3.0L Page 800

4. Install a 3 A fused jumper wire between the signal circuit terminal A and the ground circuit terminal B.

5. Verify the scan tool Brake Fluid Level Sensor parameter is Low. The parameter may take up to 60 seconds to go from OK to Low.

瀚慖f not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the

K17 EBCM.

6. If all circuits test normal, test or replace the B20 brake fluid level switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the B20 brake fluid level switch.

2. With the brake fluid in the brake master cylinder reservoir above the MIN level, test for infinite resistance between the signal terminal A and

the ground terminal B.

瀚慖f not the specified value, replace the B20 brake fluid level switch.

3. With the brake master cylinder reservoir empty, test for less than 2 ohm between the signal terminal A and the ground terminal B.

瀚慖f greater than the specified range, replace the B20 brake fluid level switch.

Repair Instructions

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

* Master Cylinder Reservoir Replacement (See: Brakes and Traction Control/Hydraulic System/Brake Fluid Reservoir/Service and Repair)

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

C0277

DTC C0277 or C0890

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 C0277 06

- Brake Pedal Position Sensor Circuit Short to Ground or Open

DTC C0277 07

- Brake Pedal Position Sensor Circuit High Voltage

DTC C0277 09

- Brake Pedal Position Sensor Circuit Too Fast Transitions

DTC C0277 4B

- Brake Pedal Position Sensor Circuit Calibration Not Learned

DTC C0890 03

- Control Module Voltage Reference Output 3 Circuit Low Voltage

DTC C0890 07

- Control Module Voltage Reference Output 3 Circuit High Voltage

Diagnostic Fault Information