DTC 66-15

DTC 66-15: Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction

NOTE: Brake fluid leaks from brake system can cause this DTC. Check for brake fluid leaks first.

1. Test-drive the vehicle.

NOTE: Drive the vehicle on a straight section of road, not on a lift.

2. Turn the ignition switch to LOCK (0).
3. Raise the vehicle, and support it with safety stands in the proper locations.
4. Turn all four wheels by hand.

Is there brake drag?

YES - Repair the brake drag.

NO - Go to step 5.

5. Turn the ignition switch to ON (II).
6. Check the BRAKE PRESS in the VSA DATA LIST with the HDS while moving the brake pedal.

Does the indicated value change?

YES - Intermittent failure, the system is OK at this time.

NO - Go to step 7.

7. 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.
8. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
9. Check for DTCs with the HDS.

Is DTC 66-15 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.