Totally Integrated Power Module (TIPM)

P0463-FUEL LEVEL SENSOR 1 CIRCUIT HIGH

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on.

Battery voltage greater than 10.4 volts.

- Set Condition:
The Totally Integrated Power Module (TIPM) detects that the Fuel Level Sensor input voltage is above the maximum acceptable value.





1. CHECK FOR AN INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all DTCs.
3. With the scan tool, read DTCs.

Does the scan tool display DTC: P0463-FUEL LEVEL SENSOR 1 CIRCUIT HIGH?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE (N4) FUEL LEVEL SIGNAL 1 CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Fuel Pump Module harness connector.
3. Disconnect the TIPM C7 harness connector.
4. Turn the ignition on.
5. Measure the voltage between ground and the (N4) Fuel Level Signal 1 circuit at the Fuel Pump Module harness connector.

Is there any voltage present?

Yes

- Repair the short to voltage in the (N4) Fuel Level Signal 1 circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE FUEL LEVEL SENSOR FOR CORRECT OPERATION
1. Turn the ignition off.
2. Connect the TIPM C7 harness connector.
3. Connect a jumper wire between the (N4) Fuel Level Signal 1 circuit and the (G109) Fuel Level Sense Return circuit at the Fuel Pump Module harness connector.
4. Turn the ignition on.
5. With the scan tool, read DTCs.

Does the scan tool display DTC: P0463-FUEL LEVEL SENSOR 1 CIRCUIT LOW?

Yes

- Replace the Fuel Level Sending Unit. .
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. CHECK THE (N4) FUEL LEVEL SIGNAL 1 CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the TIPM C7 harness connector.
3. Measure the resistance of the (N4) Fuel Level Signal 1 circuit between the Fuel Pump Module harness connector and the TIPM C7 harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Go To 5

No

- Repair the open in the (N4) Fuel Level Signal 1 circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. CHECK THE (G109) FUEL LEVEL SENSE RETURN CIRCUIT FOR AN OPEN
1. Measure the resistance of the (G109) Fuel Level Sense Return circuit between the Fuel Pump Module harness connector and the TIPM C7 harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Go To 6

No

- Repair the open in the (G109) Fuel Level Sense Return circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

6. TOTALLY INTEGRATED POWER MODULE (TIPM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Fuel Pump Module and the TIPM.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Fuel Pump Module and the TIPM C7 harness connectors.
4. Perform any Technical Service Bulletins (TSB)s that may apply.

Were any problems found?

Yes

- Repair as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the TIPM. Totally Integrated Power Module (TIPM) - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.