DTC 54-04

DTC 54-03: Fail-safe Relay 1 Stuck ON

DTC 54-04: Fail-safe Relay 1 Stuck OFF (initial)

DTC 54-21: Fail-safe Relay 1 Stuck OFF (Main)

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Check for DTCs with the HDS.

Is DTC 54-03, 54-04, or 54-21 indicated?

YES - Replace the VSA modulator-control unit.

NO - Intermittent failure, the system is OK at this time.