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.

Are there other DTCs indicated?
YES - Do the appropriate troubleshooting for the DTC.

NO - Go to step 3.


3. Clear the DTC with the HDS.

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

5. Check for DTCs with the HDS.

Is DTC 81 indicated?
YES - Go to step 6.

NO - Intermittent failure, the system is OK at this time. Check for loose terminals in the VSA modulator-control unit 47P connector. Refer to intermittent failures troubleshooting. Reading and Clearing Diagnostic Trouble Codes


6. Update the VSA modulator-control unit if it does not have the latest software. Testing and Inspection If the unit already has the latest software, substitute a known-good VSA modulator-control unit. Service and Repair

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

8. Check for DTCs with the HDS.

Is DTC 81 indicated?
YES - Check for loose terminals in the VSA modulator-control unit 47P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit, Service and Repair then retest. If the VSA modulator-control unit was substituted, go to step 1.

NO - If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit. Service and Repair If any other DTCs are indicated, go to the indicated DTCs troubleshooting.