DTC 54

ABS DTC 54: ABS Fail-safe Relay
1. Check the ABS F/S (20 A) fuse in the under-hood fuse/relay box, and reinstall the fuse if it is OK.
Is the fuse OK?
YES - Go to step 2.
NO - Replace the fuse, and rechecks
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, the TCS relay, the pump motor relay, and modulator unites
NO - Go to step 3.
3. Check the ABS fail-safe relay in the under-hood ABS relay box. Refer to the '98 - 02 Accord Service Manual (P/N 61S8400). The wire colors of the ABS fail-safe relay connector 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 4P connector terminal No. 1 and body ground.
Is there battery voltage?
YES - Go to step 5.
NO - Repair open in the wire between the underhood fuse/relay box and the ABS fail-safe relayed





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 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, the TCS relay, the modulator unit, and the under-hood ABS relay box.
NO - Go to step 10.
10. Disconnect the ABS/TCS control unit connector A (26P).
11. Turn the ignition switch ON (II).





12. Measure the voltage between terminal A25 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 the ABS/TCS control unit connector A (26P) terminal A25 and body ground.
Is there continuity?
YES - Repair short to body 9 round 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 the ABS/TCS control unit connector A (26P) terminal A25 and body ground.
Is there continuity?
YES - If the problem recurs, replace the ABS/TCS control unit.
NO - Repair open in the wire between the ABS/TCS control unit and the ABS fail-safe relayed.