VSA DTC Troubleshooting: 54
DTC 54:
 Valve Relay
  1. Turn the ignition switch to LOCK (0).
  1. Check the No. 3 (20 A) fuse in the under-hood fuse/relay box.
Is the fuse blown?
YES -
Go to Step 3 .
NO -
Reinstall the checked fuse, then go to Step 5 .
  1. Disconnect the VSA modulator-control unit 46P connector.
  1. 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. 3 (20 A) fuse in the under-hood fuse/relay box and the VSA modulator-control unit.■
NO -
Install a new No. 3 (20 A) fuse, then go to Step 6 .
  1. Disconnect the VSA modulator-control unit 46P connector.
  1. Measure the 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. 3 (20 A) fuse in the under-hood fuse/relay box and the VSA modulator-control unit.■
  1. 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 (G202).■
  1. Reconnect the VSA modulator-control unit 46P connector.
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Test-drive the vehicle at 15 km/h (10 mph) or more.
  1. 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. Refer to intermittent failures troubleshooting. ■