68-22

VSA DTC Troubleshooting: 68-22

DTC 68-22: Brake Pedal Position Switch Stuck ON

1. Start the engine.

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

Is there 10 MPa or more?
YES - Check the brake pedal height. Adjustments If the brake pedal height is OK, replace the VSA modulator-control unit. Service and Repair

NO - Go to step 3.


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 pressed, and OFF when the pedal is released?
YES - Intermittent failure, the system is OK at this time.

NO - Go to step 4.


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

Does the indicator change from ON to OFF?
YES - Replace the brake pedal position switch. Adjustments

NO - Go to step 5.


5. Turn the ignition switch to LOCK (0).

6. Short the SCS line with the HDS.

7. Disconnect ECM/PCM connector A (44P): Except Si model, Service and Repair Si model. Service and Repair

8. Turn the ignition switch to ON (II).

9. Measure the voltage between brake pedal position switch 4P connector terminal No. 2 and body ground.

Is there 0.1 V or more?
YES - Repair a short to power in the wire between the ECM/PCM and the brake pedal position switch.

NO - Update the ECM/PCM if it does not have the latest software: Except Si model, ECM/PCM Update Si model, ECM/PCM Update or substitute a known-good ECM/PCM: Except Si model, Reading and Clearing Diagnostic Trouble Codes Si model, Reading and Clearing Diagnostic Trouble Codes then go to step 1 and recheck. If DTCs are not indicated, ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM: Except Si model, Service and Repair Si model. Service and Repair