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 Temporary DTCs or 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 center console. Center Console Removal/Installation (SC Models)
6. Fold back the rear floor covering to reach the access panel. Service and Repair Remove the access panel from the floor. Fuel Tank Unit Removal and Installation
7. Disconnect the fuel tank unit 5P connector.
8. Connect fuel tank unit 5P connector terminal No. 1 to body ground with a jumper wire.
9. Remove the gauge control module. Service and Repair
10. Disconnect the gauge control module 36P connector.
11. Check for continuity between gauge control module 36P connector terminal No. 35 and body ground.
Is there continuity?
YES - Go to step 12.
NO - Repair open in the wire between the gauge control module (GND line) and the fuel gauge sending unit, then go to step 26.
12. Disconnect the gauge control module 36P connector.
13. Connect fuel tank unit 5P connector terminal No. 2 to body ground with a jumper wire.
14. Check for continuity between gauge control module 36P connector terminal No. 32 and body ground.
Is there continuity?
YES - Go to step 15.
NO - Repair open in the wire between the gauge control module (signal line) and the fuel gauge sending unit, then go to step 26.
15. Remove the jumper wire from the fuel tank unit 5P connector.
16. Remove the fuel tank unit. Fuel Tank Unit Removal and Installation
17. Test the fuel gauge sending unit. Testing and Inspection
Is the fuel gauge sending unit OK?
YES - Go to step 18.
NO - Replace the fuel gauge sending unit, Fuel Pump/Fuel Gauge Sending Unit Replacement then go to step 24.
18. Connect the fuel tank unit 5P connector.
19. Reconnect the gauge control module 36P connector.
20. Turn the ignition switch to ON (II).
21. Clear the DTC with the HDS.
22. Set the float (A) to the F position.
23. Check the fuel gauge.
Does the gauge move to the full position?
YES - Go to step 31.
NO - Replace the gauge control module, Service and Repair then go to step 24.
24. Turn the ignition switch to LOCK (0).
25. Install the parts in the reverse order of removal.
26. Reconnect all connectors.
27. Turn the ignition switch to ON (II).
28. Reset the ECM/PCM with the HDS.
29. Do the ECM/PCM idle learn procedure. ECM/PCM Idle Learn Procedure
30. Check for Temporary DTCs or 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 Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
31. Install the parts in the reverse order of removal.
32. Reconnect all connectors.
33. Update the ECM/PCM if it does not have the latest software, ECM/PCM Update or substitute a known-good ECM/PCM. Initial Inspection and Diagnostic Overview
34. Check for Temporary DTCs or 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 ECM/PCM was updated, substitute a known-good ECM/PCM, Initial Inspection and Diagnostic Overview then recheck. If the ECM/PCM was substituted, go to step 1.
NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM. Service and Repair If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.