VSA System

VSA DTC Troubleshooting: 81

DTC 81:

VSA Modulator-Control Unit Internal Circuit Malfunction

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

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.�

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.�