DTC Troubleshooting: 66
DTC 66:
 VSA Pressure Sensor (Inside of VSA Modulator-control Unit)
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
  1. Check for DTCs with the HDS.
Is DTC 64 indicated?
YES -
Do the troubleshooting for DTC 64.
NO -
Go to Step 5 .
  1. Check the BRAKE PRESS in the VSA DATA LIST with the HDS without pressing the brake pedal.
Is there 0.8 MPa or more?
YES -
Go to Step 6 .
NO -
Go to Step 11 .
  1. Press the brake pedal until BRAKE SWITCH in the VSA DATA LIST is turned ON with the HDS.
  1. Check the BRAKE PRESS in the VSA DATA LIST with the HDS.
Is there 0 MPa?
YES -
Go to Step 8 .
NO -
Check the brake pedal position switch. If necessary, replace the switch. ■
  1. Do the VSA sensor neutral position memorization.
  1. Start the engine and press the brake pedal until BRAKE PRESS in the VSA DATA LIST is 15 MPa with the HDS.
  1. Check for DTCs with the HDS.
Is DTC 66 indicated?
YES -
Go to Step 11 .
NO -
The system is OK at this time.■
  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. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
  1. Check for DTCs with the HDS.
Is DTC 66 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.■