DTC Troubleshooting: 66-15

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

1.Raise the vehicle, and support it with safety stands in the proper locations.

2.Turn the all four wheels by hand.

Is there the brake drag?


YES - Repair the brake drag.n


NO - Go to 3.


3.Check the PRESSURE SWITCH in the VSA DATA LIST with the HDS while moving the brake pedal.

Do the indicated values change?


YES - Intermittent failure, the system is OK at this time. Check for loose terminals between the brake pedal position switch 4P connector, the PCM connector A (44P), and the VSA modulator-control unit 37P connector. Refer to intermittent failures troubleshooting.n


NO - Check for loose terminals in the VSA modulator-control unit 37P connector. If necessary, substitute a known-good VSA modulator-control unit and retest.n