THEORY OF OPERATION
When the PCM is sending Signal not available or is not performing the signal Parity or Toggle correctly for the Brake Switch Status signal the ABS module sets DTC C0040-29-BRAKE PEDAL SWITCH-SIGNAL INVALID.
The brake switch rationality checks both failure modes of the brake switch. The brake switch stuck on test checks for a high vehicle speed condition where the brake switch is continually depressed. The brake switch stuck off test checks for brake pressure present with the brake switch saying not pressed.
C211B-92-IGNITION RUN/START INPUT CIRCUIT PERFORMANCE - PERFORMANCE OR INCORRECT OPERATION
For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .