DTC Troubleshooting: 68-22

DTC 68-22:  Brake Pedal Position Switch Stuck ON

1.Turn the ignition switch ON (II).

2.Check the BRK PRESS in the VSA DATA LIST with the HDS. Do not press the brake pedal.

Is 0.5 V or more?


YES - Go to 3.


NO - Replace the VSA modulator-control unit.n


3.Check the BRAKE SWITCH in the VSA DATA LIST with the HDS while moving the brake pedal.

Does it indicate ON when the pedal is pushed, and OFF when pedal is released?


YES - Intermittent failure, the system is OK at this time. Check for loose terminals between the brake pedal position switch 4P connector, the PCM connector A (44P), and the VSA modulator-control unit 37P connector. Refer to intermittent failures troubleshooting.n


NO - Go to 4.

4.Check the BRAKE SWITCH in the VSA DATA LIST with the HDS, and disconnect the brake pedal position switch 4P connector.

Does indicate change ON to OFF?


YES - Substitute a known-good PCM, then go to step 1 and recheck. If DTCs are not indicated, replace the original PCM: R18A1 engine model, K20Z2 engine model.n


NO - Go to 5.


5.Check for continuity between brake pedal position switch 4P connector terminal No. 2 and body ground.

 

Is there continuity?


YES - Repair short in the wire between the PCM and the brake pedal position switch.n


NO - Replace the brake pedal position switch.n