Test J
Pinpoint Test J: DTC C1287-Brake Booster Pedal Force Switch Circuit FailureTest J1 - J3:
Test J4 - J5:
Test J6 - J7 (Continued):
Test J7 - J8:
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