DTC Troubleshooting
DTC Troubleshooting: P0463
DTC P0463:
Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit High Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS, and wait 5 seconds.
3. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0463 indicated?
YES -
Go to step 4.
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the gauge control module and the fuel gauge sending unit.�
4. Turn the ignition switch to LOCK (0).
5. Remove the access panel from the floor Fuel Tank Unit Removal/Installation.
6. Disconnect the fuel tank unit 4P connector.
7. Connect fuel tank unit 4P connector terminal No. 3 to body ground with a jumper wire.
8. Remove the gauge control module Gauge Control Module Replacement.
9. Disconnect the gauge control module 36P connector.
10. Check for continuity between gauge control module 36P connector terminal No. 32 and body ground.
Is there continuity?
YES -
Go to step 11.
NO -
Repair an open in the wire between the gauge control module (GND line) and the fuel gauge sending unit, then go to step 23.
11. Connect fuel tank unit 4P connector terminal No. 1 to body ground with a jumper wire.
12. Check for continuity between gauge control module 36P connector terminal No. 31 and body ground.
Is there continuity?
YES -
Go to step 13.
NO -
Repair an open in the wire between the gauge control module (signal line) and the fuel gauge sending unit, then go to step 23.
13. Remove the jumper wire from the fuel tank unit 4P connector.
14. Remove the fuel tank unit Fuel Tank Unit Removal/Installation.
15. Test the fuel gauge sending unit Testing and Inspection.
Is the fuel gauge sending unit OK?
YES -
Go to step 16.
NO -
Replace the fuel gauge sending unit Testing and Inspection, then go to step 22.
16. Connect the fuel tank unit 4P connector.
17. Reconnect the gauge control module 36P connector.
18. Turn the ignition switch to ON (II).
19. Clear the DTC with the HDS.
20. Set the float (A) to the full position (B).
21. Check the fuel gauge.
Does the gauge move to the full position?
YES -
Go to step 29.
NO -
Replace the gauge control module Gauge Control Module Replacement, then go to step 22.
22. Turn the ignition switch to LOCK (0).
23. Reconnect all connectors.
24. Install the parts in the reverse order of removal.
25. Turn the ignition switch to ON (II).
26. Reset the PCM with the HDS.
27. Do the PCM idle learn procedure PCM Idle Learn Procedure.
28. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0463 indicated?
YES -
Check for poor connections or loose terminals at the gauge control module and the fuel gauge sending unit, then go to step 1.
NO -
Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�
29. Reconnect all connectors.
30. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM Initial Inspection and Diagnostic Overview.
31. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0463 indicated?
YES -
Check for poor connections or loose terminals at the gauge control module and the fuel gauge sending unit. If the PCM was updated, substitute a known-good PCM Initial Inspection and Diagnostic Overview, then recheck. If the PCM was substituted, go to step1.
NO -
If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�