54-1

VSA DTC Troubleshooting: 54

DTC 54:

Fail-Safe Relay Malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Reading and Clearing Diagnostic Trouble Codes.

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

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

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 54 indicated?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting.

6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

7. Check the No. 2-3 (30 A) fuse in the under-hood fuse/relay box.

Is the fuse blown?

YES -

Go to step 8.

NO -

Reinstall the checked fuse, then go to step 16.

8. Disconnect the VSA modulator-control unit 47P connector.

9. Check for continuity between VSA modulator-control unit 47P connector terminal No. 32 and body ground.





Is there continuity?

YES -

Repair a short to body ground in the wire between the No. 2-3 (30 A) fuse in the under-hood fuse/relay box and the VSA modulator-control unit.

NO -

Install a new No. 2-3 (30 A) fuse in the under-hood fuse/relay box, then go to step 10.

10. Reconnect the VSA modulator-control unit 47P connector.

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

12. Clear the DTC with the HDS.

13. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

14. Test-drive the vehicle at 19 mph (30 km/h) or more.

NOTE: Drive the vehicle on the road, not on a lift.

15. Check for DTCs with the HDS.

Is DTC 54 indicated?

YES -

Go to step 19.

NO -

Troubleshooting is complete.

16. Disconnect the VSA modulator-control unit 47P connector.

17. Measure the voltage between VSA modulator-control unit 47P connector terminal No. 32 and body ground.





Is there battery voltage?

YES -

Go to step 18.

NO -

Repair an open in the wire between the No. 2-3 (30 A) fuse in the under-hood fuse/relay box and the VSA modulator-control unit.

18. Reconnect the VSA modulator-control unit 47P connector.

19. Update the VSA modulator-control unit if it does not have the latest software Testing and Inspection.

20. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

21. Test-drive the vehicle at 19 mph (30 km/h) or more.

NOTE: Drive the vehicle on the road, not on a lift.

22. Check for DTCs with the HDS.

Is DTC 54 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 47P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit Service and Repair.

NO -

If the VSA modulator-control unit was updated, troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.