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VSA DTC Troubleshooting: 68-22

DTC 68-22:
 Brake Pedal Position Switch Stuck ON
  1. Turn the ignition switch to ON (II).
  1. 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. If the brake pedal height is OK, go to Step 10 .
NO -
Go to Step 3 .
  1. 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 .
  1. 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 -
NO -
Go to Step 5 .
  1. Turn the ignition switch to LOCK (0).
  1. Short the SCS line with the HDS.
  1. Disconnect ECM/PCM connector A (49P).
  1. Turn the ignition switch to ON (II).
  1. 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 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, or substitute a known-good ECM/PCM, then go to Step 1 and recheck. If the ECM/PCM was updated and DTCs are not indicated, troubleshooting is complete. If the ECM/PCM was substituted and DTCs are not indicated, replace the original ECM/PCM.
  1. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
  1. Check for DTCs with the HDS.
Is DTC 68-22 indicated?
YES -
Check for loose terminals in the VSA modulator-control unit 36P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit, then retest. If the VSA modulator-control unit was substituted, go to Step 1 .
NO -
If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.■