Manufacturer Code Charts: 66

VSA DTC Troubleshooting: 66

DTC 66: VSA Pressure Sensor (Software)

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

2. Check for DTCs with the HDS.

Is DTC 91 or 92 indicated with DTC 66 at the same time?
YES - Do the DTC 91 or 92 troubleshooting: DTC 91, VSA System DTC 92. 92

NO - Go to step 3.


3. Turn the ignition switch to LOCK (0).

4. Disconnect the brake pedal position switch 4P connector.

5. Do the brake pedal position switch test. Testing and Inspection

Is the switch OK?
YES - Go to step 6.

NO - Replace the brake pedal position switch. Adjustments


6. Short the SCS line with the HDS.

7. Disconnect the PCM connector A (49P).

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

9. Measure the voltage between PCM connector A (49P) terminal No. 8 and body ground.

Is there 0.1 V or more when the brake pedal is released?
YES - Repair short to power in the wire between the brake pedal position switch and the PCM.

NO - Go to step 10.






10. Turn the ignition switch to LOCK (0).

11. Substitute a known-good PCM. Initial Inspection and Diagnostic Overview

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

13. Clear the DTC with the HDS.

14. Test-drive the vehicle at 8 mph (12 km/h) for 60 seconds or more.

15. Check for DTCs with the HDS.

Is DTC 66 indicated?
YES - Check for loose terminals in the VSA modulator-control unit 46P connector. Check for a loose connection at G303. If necessary, substitute a known-good VSA modulator-control unit, Service and Repair and retest.

NO - Replace the original PCM. Service and Repair