2010 Cadillac Truck SRX AWD V6-2.8L Turbo 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
