DTC 54

DTC 54: ABS Fail-safe Relay
1. Clear the DTC using the HDS.
2. Disconnect the HDS.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Test-drive the vehicle.
Does the ABS indicator come on, and is DTC 54 indicated?
YES - Go to step 5.
NO - Intermittent failure; the vehicle is OK at this time. Check for lose terminals at the ABS modulator-control unit.
5. Check the No. 18 (30 A) fuse in the under-hood fuse/relay box.
Is the fuse OK?
YES - Reinstall the fuse, and go to step 6.
NO - Replace the fuse, and recheck. If the fuse is blown, check for a short to body ground in the +B-V circuit. If the circuit is OK, replace ABS modulator-control unit.
6. Disconnect the ABS control unit 47P connector.





7. Measure the voltage between the ABS control unit 47P connector terminal No. 32 and body ground.
Is there battery voltage?
YES - Go to step 8.
NO - Repair open in the wire between the No. 18 (30 A) fuse and the ABS modulator-control unit.





8. Check for continuity between the ABS control unit 47P connector terminal No. 16 and body ground.
Is there continuity?
YES - Check for loose terminals in the ABS control unit 47P connector. If the terminals are OK, replace the ABS modulator-control unit.
NO - Repair open in the wire between the ABS modulator-control unit and body ground (G202). If the wire is OK, repair G202.