Possible Causes
The (P057B, P057C, P057D, U11BF) Brake Pedal Travel Sensor faults can set for any of the following:
| POSSIBLE CAUSES |
|---|
| 5-VOLT SUPPLY CIRCUIT OPEN OR SHORTED TO GROUND |
| BRAKE PEDAL TRAVEL SIGNAL CIRCUIT SHORTED TO VOLTAGE (CIRCUIT HIGH) |
| BRAKE PEDAL TRAVEL SIGNAL CIRCUIT SHORTED TO GROUND (CIRCUIT LOW) |
| BRAKE PEDAL TRAVEL SIGNAL CIRCUIT OPEN/HIGH RESISTANCE (CIRCUIT LOW) |
| BRAKE PEDAL TRAVEL GROUND CIRCUIT OPEN/HIGH RESISTANCE (CIRCUIT LOW) |
| FAULTY BRAKE PEDAL POSITION SENSOR |
| FAULTY BRAKE SYSTEM MODULE (BSM) |
The (C053D, C10F5, U0418) performance and implausible/lost message faults can set for any of the following:
| POSSIBLE CAUSES |
|---|
| FAULTY HYDRAULIC ASSEMBLY (BPP AND BRAKE SIMULATOR SENSORS ARE INTERNAL) |
| FAULTY BRAKE SYSTEM MODULE (BSM) |
The (U0121, U0129) Loss of Communication faults can set for any of the following:
| POSSIBLE CAUSES |
|---|
| BATTERY OR IGNITION SUPPLY TO BSM OPEN OR SHORTED TO GROUND |
| BSM GROUND CIRCUIT OPEN/HIGH RESISTANCE |
| BSM CAN BUS CIRCUITS SHORTED TO VOLTAGE |
| BSM CAN BUS CIRCUITS SHORTED TO GROUND |
| BSM CAN BUS CIRCUITS OPEN/HIGH RESISTANCE |
| FAULTY BRAKE SYSTEM CONTROL MODULE (BSCM) |
The Wheel Speed Sensor faults can set for any of the following:
| POSSIBLE CAUSES |
|---|
| SNA OR ERROR MESSAGE FROM BSCM |
| WSS SIGNAL CIRCUITS SHORTED TO VOLTAGE |
| WSS SIGNAL CIRCUITS SHORTED TO GROUND |
| WSS SIGNAL CIRCUITS OPEN/HIGH RESISTANCE |
| WSS GROUND CIRCUIT OPEN/HIGH RESISTANCE |
| DAMAGED TONE WHEEL |
| FAULTY WHEEL SPEED SENSOR |
| FAULTY BRAKE SYSTEM CONTROL MODULE (BSCM) |