Test I

Test I1-I3:

Test I3-I5:

Test I6:

Pinpoint Test I: DTC C1285-Booster Solenoid 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 internal solenoids that assist driver brake applications or can apply the brakes when needed if the vehicle loses control.
Power is supplied by circuit 8-CF68 (WH/RD). Ground is provided through circuit 9-CF68 (BN/RD).

Possible Causes
^ Power circuit 8-CF6E, (WH/RD).
^ Ground circuit 9-CF68 (BN/RD).
^ Active brake booster.
^ ABS module.