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.
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 rear seat cushion, then remove the access panel from the floor.
6. Disconnect the fuel tank unit 4P connector.
7. Turn the ignition switch to ON (II).
8. Measure the voltage between fuel tank unit 4P connector terminals No. 1 and No. 3.
Is there battery voltage?
YES -
Go to step 16.
NO -
Go to step 9.
9. Turn the ignition switch to LOCK (0).
10. Connect fuel tank unit 4P connector terminal No. 3 to body ground with a jumper wire.
11. Remove the gauge control module.
12. Disconnect the gauge control module 32P connector.
13. Check for continuity between gauge control module 32P connector terminal No. 3 and body ground.
Is there continuity?
YES -
Go to step 14.
NO -
Repair an open in the wire between the gauge control module (GND line) and the fuel gauge sending unit, then go to step 26.
14. Connect fuel tank unit 4P connector terminal No. 1 to body ground with a jumper wire.
15. Check for continuity between gauge control module 32P connector terminal No. 8 and body ground.
Is there continuity?
YES -
Replace the gauge control module Service and Repair, then go to step 26.
NO -
Repair an open in the wire between the gauge control module (signal line) and the fuel gauge sending unit, then go to step 26.
16. Turn the ignition switch to LOCK (0).
17. Remove the fuel tank unit.
18. Test the fuel gauge sending unit.
Is the fuel gauge sending unit OK?
YES -
Go to step 19.
NO -
Replace the fuel gauge sending unit, then go to step 26.
19. Connect the fuel tank unit 4P connector.
20. Reconnect the gauge control module 32P connector.
21. Turn the ignition switch to ON (II).
22. Clear the DTC with the HDS.
23. Set the float (A) to the F position.
24. Check the fuel gauge.
Does the gauge move to the full position?
YES -
Go to step 32.
NO -
Replace the gauge control module, then go to step 25.
25. Turn the ignition switch to LOCK (0).
26. Reinstall all removed parts in the reverse order of removal.
27. Reconnect all connectors.
28. Turn the ignition switch to ON (II).
29. Reset the PCM with the HDS.
30. Do the PCM idle learn procedure.
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, 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.
32. Turn the ignition switch to LOCK (0).
33. Reinstall all removed parts in the reverse order of removal.
34. Reconnect all connectors.
35. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
36. 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, then recheck. If the PCM was substituted, go to step 1.
NO -
If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.