Normal Operation

The ABS module receives brake pedal input from the PCM over the High Speed Controller Area Network (HS-CAN) bus. The ABS module compares this information against other inputs (wheel speed signals and vehicle speed signal) to determine if the brake pedal input is valid.

• DTC C1446 (Brake Switch Circuit Failure) - If, during normal operation or the on-demand self test, the ABS module cannot detect the brake pedal input or if the brake pedal input does not match information from other sensors (wheel speed signals and vehicle speed signal), DTC C1446 will be set.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• Brake pedal switch