Test J

PINPOINT TEST J: DTC C1287-BRAKE BOOSTER PEDAL FORCE SWITCH CIRCUIT FAILURE

CAUTION: Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

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

The normally open pedal force switch circuit is 1581 (PK/LB). The normally closed pedal force switch circuit is 1580 (WH/LG).

Possible Causes
^ circuit 1579 (OG/RD) open, short to ground
^ circuit 1580 (WH/LG) open, short to power or ground
^ circuit 1581 (PK LB) open, short to power or ground
^ Active brake booster
^ ABS module

J1:

J2 - J3:

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J8: