DTC 81

DTC 81: Central Processing Unit (CPU)

1. Check for other DTCs.
Is another DTC indicated?
YES - Do the appropriate troubleshooting for the DTC.
NO - Go to step 2.

2. Clear the DTC using the HDS.
3. Turn the ignition switch OFF.
4. Disconnect the HDS from the 16P DLC.
5. Test-drive the vehicle.
Does the ABS indicator come on, and is DTC 81 indicated?
YES - Go to step 6.
NO - Intermittent failure, the vehicle is OK at this time.

6. Disconnect the VSA modulator-control unit 47P connector, the steering angle sensor 5P connector, and the yaw rate-lateral acceleration sensor 5P connector.
7. Start the engine.
8. Measure the voltage between VSA modulator-control unit 47P connector terminal No. 35 and body ground.





Is there less than 0.1 V?
YES - Go to step 9.
NO - Repair short to power in the wire between the VSA modulator-control unit, the yaw rate-lateral acceleration sensor, and the steering angle sensor.

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





Is there continuity?
YES - Repair short to body ground in the wire between the VSA modulator-control unit, the yaw rate-lateral acceleration sensor, and the steering angle sensor.
NO - Check for loose terminals in the VSA modulator-control unit 47P connector. If necessary, substitute a known-good VSA modulator-control unit, and recheck.