Test I: DTC C1287 - Brake Booster Pedal Force Switch Circuit Failure

Pinpoint Test I: DTC C1287 - Brake Booster Pedal Force Switch Circuit Failure
Refer to Vehicle/Diagrams, Vehicle Dynamic Systems for schematic and connector information.

Normal Operation
The active brake booster contains a normally open and a normally closed pedal force switch that operates according to driver brake applications.

The ABS module provides a reference voltage to the pedal force switch along circuit CCA29 (GN/BU). The voltage returns along either the normally open pedal force circuit CCA26 (BU/GY) or the normally closed pedal force circuit CCA25 (VT/GY), depending on the driver brake application.
^ DTC C1287 Brake Booster Pedal Force Switch Circuit Failure - If, during normal operation or the ABS module on-demand self test, the ABS module detects an open circuit, a short to voltage or a short to ground on circuits CCA26 (BU/GY) or CCA25 (VT/GY), DTC C1287 will be set. Also, a failure of the booster pedal force switch will cause DTC C1287 to be set.

This pinpoint test is intended to diagnose the following:
^ Wiring, terminals or connectors
^ Active brake booster
^ ABS module

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