DTC 54

DTC 54: Fail-safe Relay

1. Turn the ignition switch OFF.
2. Disconnect the VSA modulator-control unit 47P connector.
3. Check for continuity between VSA modulator-control unit 47P connector terminal No. 47 and body ground.





Is there continuity?

YES - Go to step 4.

NO - Repair open in the wire between the VSA modulator-control unit and body ground (G203).

4. Reconnect the VSA modulator-control unit 47P connector.
5. Turn the ignition switch ON (II).
6. Clear the DTC with the HDS.
7. Turn the ignition switch OFF, then disconnect the HDS.
8. Test-drive the vehicle.
9. Check for DTCs with the HDS.

Is DTC 54 indicated?

YES - Replace the VSA modulator-control unit.

NO - The system is OK at this time. Refer to intermittent failures.