| DTC 54-04: | Fail-safe Relay 1 Stuck OFF (Initial) |
| 1. | Turn the ignition switch ON (II). |
| 2. | Clear the DTC with the HDS. |
| 3. | Turn the ignition switch OFF, then turn it ON (II) again. |
| 4. | Check for DTCs with the HDS. Is DTC 54-04 or 54-21 indicated? YES - Go to 5. NO - Intermittent failure, the system is OK at this time. Check for loose terminals at the ABS modulator-control unit 25P connector. Refer to intermittent failures troubleshooting.n |
| 5. | Turn the ignition switch OFF. |
| 6. | Check the No. 3 FSR (30 A) fuse in the under-hood fuse/relay box. Is the fuse blown? YES - Go to 7. NO - Reinstall the checked fuse, then go to 9. |
| 7. | Disconnect the ABS modulator-control unit 25P connector. |
| 8. | Check for continuity between ABS modulator-control unit 25P connector terminal No. 8 and body ground.
Is there continuity? YES - Repair short in the wire between the No. 3 FSR (30 A) fuse and the ABS modulator-control unit.n NO - Install the new No. 3 FSR (30 A) fuse, then go to 9. |
| 9. | Disconnect the ABS modulator-control unit 25P connector. |
| 10. | Measure voltage between ABS modulator-control unit 25P connector terminal No. 8 and body ground.
Is there battery voltage? YES - Check for loose terminals in the ABS modulator-control unit 25P connector. If necessary, substitute a known-good ABS modulator-control unit and retest: Except K20Z2 engine model, K20Z2 engine model.n NO - Repair open in the wire between the No. 3 FSR (30 A) fuse and the ABS modulator-control unit.n |