DTC Troubleshooting: P0463
DTC P0463: Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit High Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P0463 Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit High Voltage
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Wait 5 seconds.

?4.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0463 Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit High Voltage
    

Is DTC P0463 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
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 tank unit. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?
2.
Open wire check (FUEL GAUGE- line):

Open wire check (FUEL GAUGE- line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Remove the gauge control module.

?3.
Disconnect the following connectors.
Fuel tank unit 4P connector
Gauge control module connector A (32P)

?4.
Connect terminals A and B with a jumper wire.
Terminal A
Fuel tank unit 4P connector (female terminals) No. 4:
Terminal B
Body ground


?5.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Fuel tank unit 4P connector: disconnected
Fuel tank unit 4P connector No. 4: jumped to body ground
Gauge control module connector A (32P): disconnected
Test point 1
Gauge control module connector A (32P) No. 21
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Repair an open in the FUEL GAUGE- wire between the gauge control module and the fuel tank unit.?
3.
Open wire check (FUEL GAUGE+ line):

Open wire check (FUEL GAUGE+ line)
?1.
Remove the jumper wire from the fuel tank unit 4P connector.

?2.
Connect terminals A and B with a jumper wire.
Terminal A
Fuel tank unit 4P connector (female terminals) No. 2:
Terminal B
Body ground


?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Fuel tank unit 4P connector: disconnected
Fuel tank unit 4P connector No. 2: jumped to body ground
Gauge control module connector A (32P): disconnected
Test point 1
Gauge control module connector A (32P) No. 22
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Repair an open in the FUEL GAUGE+ wire between the gauge control module and the fuel tank unit.?
4.
Fuel gauge sending unit check:

Fuel gauge sending unit check
?1.
Remove the jumper wire from the fuel tank unit 4P connector.

?2.
Test the fuel gauge sending unit.

Is the fuel gauge sending unit OK?

     
YES
     
     
     
     
NO