Manufacturer Code Charts: 66

VSA DTC Troubleshooting: 66

DTC 66: VSA Pressure Sensor (Inside of VSA Modulator-Control Unit)

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

4. Check for DTC s with the HDS.

Is DTC 64 indicated?
YES - Do the troubleshooting for DTC 64. VSA System

NO - Go to step 5.


5. Check the BRAKE PRESS in the VSA DATA LIST with the HDS without pressing the brake pedal.

Is there over 0.8 MP a or more?
YES - Go to step 6.

NO - Replace the VSA modulator-control unit. Service and Repair


6. Press the brake pedal until BRAKE SWITCH in the VSA DATA LIST is turned ON with the HDS.

7. 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. Brake Pedal and Brake Pedal Position Switch Adjustment


8. Do the VSA sensor neutral position memorization. Programming and Relearning

9. Start the engine and press the brake pedal until BRAKE PRESS in the VSA DATA LIST is 15 MPa with the HDS.

10. Check for DTCs with the HDS.

Is DTC 66 indicated?
YES - Check for loose terminals or poor connections at the VSA modulator-control unit 47P connector. If connections are good, replace the VSA modulator-control unit, Service and Repair and recheck.

NO - The system is OK at this time. Refer to intermittent failures. Reading and Clearing Diagnostic Trouble Codes