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

Test J1 - J2:

Test J3 - J5:

Test J5 - J7:

Normal Operation
The active brake booster has a 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 3127 (BK LB) open, short to power or 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