VSA System

VSA DTC Troubleshooting: 81

DTC 81: Central Processing Unit (CPU)

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

2. Check for other system DTCs with the HDS.

Is another system DTC indicated?
YES - Do the appropriate troubleshooting for the DTC.

NO - Go to step 3.


3. Clear the DTC with the HDS.

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

5. Test-drive the vehicle at 19 mph (30 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.

6. Check for DTCs with the HDS.

Is DTC 81 indicated?
YES - Go to step 7.

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


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

8. Disconnect the VSA modulator-control unit 47P connector and the yaw rate-lateral/longitudinal acceleration sensor 5P connector.

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

10. Measure the voltage between the VSA modulator-control unit 47P connector terminal No. 35 and body ground.

Is there 0.1 V or more?
YES - Repair a short to power in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.

NO - Go to step 11.






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

12. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 35 and body ground.

Is there continuity?
YES - Repair a short to body ground in the wire between the VSA modulator-control unit and the yaw rate-lateral/longitudinal acceleration sensor.

NO - 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.