DTC Troubleshooting: 68
DTC 68:
 Brake Pedal Position Switch
  1. Turn the ignition switch to ON (II).
  1. Check for other DTCs.
Is another DTC indicated?
YES -
Do the appropriate troubleshooting for the DTC.■
NO -
Go to Step 3 .
  1. Turn the ignition switch to LOCK (0).
  1. Check the brake pedal position switch, and adjustment.
Is the switch and adjustment OK?
YES -
Go to Step 5 .
NO -
Adjust the brake pedal position switch. If necessary, replace the brake pedal position switch. ■
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Test-drive the vehicle.
    NOTE: Drive the vehicle on a straight section of road, not on a lift.
  1. Check for DTCs with the HDS.
Is DTC 68 indicated?
YES -
Go to Step 9 .
NO -
The system is OK at this time.■
  1. Troubleshoot the brake pedal position switch signal circuit:
    • R20A3 engine model.
    • K24Z3 engine model.
Is the brake pedal position switch circuit OK?
YES -
Go to Step 10 .
NO -
Repair the brake pedal position switch circuit.■
  1. Reconnect all connectors.
  1. Update the ECM/PCM if it does not have the latest software: R20A3 engine model, K24Z3 engine model, or substitute a known-good ECM/PCM: R20A3 engine model, K24Z3 engine model.
  1. Clear the DTC with the HDS.
  1. Test-drive the vehicle.
    NOTE: Drive the vehicle on a straight section of road, not on a lift.
  1. Check for DTCs with the HDS.
Is DTC 68 indicated?
YES -
Check for loose terminals in the ECM/PCM connector A (44P) or the ECM/PCM connector A (49P). If the ECM/PCM was updated, substitute a known-good ECM/PCM: R20A3 engine model, K24Z3 engine model, then retest. If the ECM/PCM was substituted, go to Step 15 .
NO -
If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM: R20A3 engine model, K24Z3 engine model. ■
  1. Update the VSA modulator-control unit if it does not have the latest software. If the unit already has the latest software, substitute a known-good VSA modulator-control unit.
  1. Test-drive the vehicle.
    NOTE: Drive the vehicle on a straight section of road, not on a lift.
  1. Check for DTCs with the HDS.
Is DTC 68 indicated?
YES -
Check for loose terminals in the VSA modulator-control unit 47P 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.■