DTC 68-22

DTC 68-22: Brake Pedal Position Switch Stuck ON
1. Turn the ignition switch to ON (II).
2. Check the BRK PRESS in the VSA DATA LIST with the HDS. Do not press the brake pedal.

Is it 10 MPa or more?

YES - Check the brake pedal height. If the brake pedal height is OK, replace the VSA modulator-control unit.

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.

Does the indicator change from ON to OFF?

YES - Replace the brake pedal position switch.

NO - Go to step 5.

5. Turn the ignition switch to LOCK (0).
6. Short the SCS line with the HDS.
7. Disconnect ECM connector A (44P).
8. Turn the ignition switch to ON (II).
9. Measure voltage between brake pedal position switch 4P connector terminal No. 2 and body ground.





Is there 0.1 V or more?

YES - Repair short to power in the wire between the ECM and the brake pedal position switch.

NO - Substitute a known-good ECM, then go to step 1 and recheck. If DTCs are not indicated, replace the original ECM.