DTC 54
DTC 54: Valve Relay1. Turn the ignition switch OFF.
2. Check the No. 2 (20 A) fuse in the auxiliary fuse box.
Is the fuse blown?
YES - Go to step 3.
NO - Reinstall the checked fuse, then go to step 5.
3. Disconnect the VSA modulator-control unit 46P connector.
4. Check for continuity between VSA modulator-control unit 46P connector terminal No. 44 and body ground.
Is there continuity?
YES - Repair short to body ground in the wire between the No. 2 (20 A) fuse in the auxiliary fuse box and the VSA modulator-control unit.
NO - install a new No. 2 (20 A) fuse, then go to step 6.
5. Disconnect the VSA modulator-control unit 46P connector.
6. Measure voltage between VSA modulator-control unit 46P terminal No. 44 and body ground.
Is there battery voltage?
YES - Go to step 7.
NO - Repair open in the wire between the No. 2 (20 A) fuse in the auxiliary fuse box and the VSA modulator-control unit.
7. Check for continuity between VSA modulator-control unit 46P connector terminal No. 43 and body ground.
Is there continuity?
YES - Go to step 8.
NO - Repair open in the wire between the VSA modulator-control unit and body ground (G302).
8. Reconnect the VSA modulator-control unit 46P connector.
9. Turn the ignition switch ON (II).
10. Clear the DTC with the HDS.
11. Test-drive the vehicle at 10 mph (15 km/h) or more.
12. Check for DTCs with the HDS.
Is DTC 54 indicated?
YES - Check for loose terminals in the VSA modulator-control unit 46P connector. If necessary, substitute a known-good VSA modulator-control unit and retest.
NO - intermittent failure, the system is OK at this time. Check for loose terminals at the VSA modulator-control unit 46P connector.