DTC 54

ABS DTC 54: ABS Fail-safe Relay
1. Check the ABS F/S (20A) fuse in the under-hood fuse/relay box ('99-01 models) or the ABS + B (20A) fuse in the under-hood ABS fuse/relay box ('02-03 models).
Is the fuse OK ?
YES-Reinstall the fuse, and go to step 2.
NO-Replace the fuse, and recheck. If the fuse blows with the ignition switch OFF, repair short to body ground between the ABS fail-safe relay and ABS F/S (20A) fuse or ABS + B (20A) fuse.
2. Turn the ignition switch ON (II).
Does the fuse blow?
YES-Repair short to body ground in the wire between the ABS fail-safe relay, TCS relay, ABS pump motor relay, and modulator unit.
NO-Go to step 3.
3. Check the ABS fail-safe relay in the ABS relay box. The wire colors of the ABS fail-safe relay connectors are WHT/GRN, BRN/BLK, BLK, and YEL/ GRN.
Is the relay OK ?
YES-Leave the ABS fail-safe relay removed, and go to step 4.
NO-Replace the ABS fail-safe relay.





4. Measure the voltage between the ABS fail-safe relay 4Pconnector terminal No. 1 and body ground.
Is there battery voltage?
YES-Go to step 5.
NO-Repair open in the wire between the under-hood ABS fuse/relay box and the ABS fail-safe relay.





5. Connect the ABS fail-safe relay 4P connector terminal No. 1 to No. 2 with a jumper wire.
6. Disconnect the modulator unit 24P connector.





7. Measure the voltage between terminal No. 2 and body ground.
Is there battery voltage?
YES-Go to step 8.
NO-Repair open in the wire between the ABS fail-safe relay and the modulator unit.
8. Remove the jumper wire from the ABS fail-safe relay 4P connector.





9. Measure the voltage between the modulator unit 24P connector terminal No. 2 and body ground.
Is there battery voltage?
YES-Repair short to power in the wire between the ABS fail-safe relay, TCS relay, modulator unit, and under-hood ABS fuse/relay box.
NO-Goto step 10.
10. Disconnect ABS/TCS control unit connector A (26P).
11. Turn the ignition switch ON (II).





12. Measure the voltage between terminal No. 25 and body ground.
Is there battery voltage?
YES-Repair short to power in the wire between the ABS/TCS control unit and the ABS fail-safe relay.
NO-Go to step 13.





13. Check for continuity between ABS/TCS control unit connector A (26P) terminal No. 25 and body ground.
Is there continuity?
YES-Repair short to body ground in the wire between the ABS/TCS control unit and the ABS fail-safe relay.
NO-Go to step 14.





14. Check for continuity between the ABS fail-safe relay 4P connector terminal No. 3 and body ground.
Is there continuity?
YES-Go to step 15.
NO-Repair open in the wire between the ABS fail-safe relay and body ground, or a loose or poor connection at body ground (G202).





15. Connect the ABS fail-safe relay 4P connector terminals No. 3 and No. 4 with a jumper wire.




16. Check for continuity between ABS/TCS control unit connector A (26P) terminal No. 25 and body ground.
Is there continuity?
YES-Check for loose ABS/TCS control unit connectors. If necessary, substitute a known-good ABS/TCS control unit, and recheck.
NO-Repair open in the wire between the ABS/TCS control unit and the ABS fail-safe relay.