DTC 63

DTC 63: Back Up Circuit Voltage Malfunction
1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch OFF.
4. Turn the ignition switch ON (II).
5. Check for DTCs with the HDS.
Is DTC 63 indicated?
YES - Go to step 6.
NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the servo unit.

6. Turn the ignition switch OFF.
7. Check the No. 61 (10 A) fuse in the auxiliary under hood fuse/relay box.
Is the fuse blown?
YES - Go to step 8.
NO - Reinstall the fuse, then go to step 10.

8. Disconnect the servo unit 25P connector.
9. Check for continuity between the servo unit 25P connector terminal No. 12 and body ground.





Is there continuity?
YES - Repair short in the wire between the No. 61 (10 A) fuse and the servo unit.
NO - Install the new No. 61 (10 A) fuse, then go to step 1 and recheck.

10. Disconnect the servo unit 25P connector.
11. Measure voltage between the servo unit 25P connector terminal No. 12 and body ground.





Is there battery voltage?
YES - Replace the servo unit.
NO - Repair open in the wire between the No. 61 (10 A) fuse and the servo unit.