Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

3
Tests for the proper operation of the circuit in the low voltage range.

DTC P0463

Step	Action	Value(s)	Yes	No
Schematic Reference: Instrument Cluster Schematics
1	Did you perform the Instrument Cluster Diagnostic System Check?	-	Go to Step 2	Go to Diagnostic System Check - Instrument Cluster
2	Install the scan tool. Turn ON the ignition, with the engine OFF. With the scan tool, observe one of the following fuel level parameters: Fuel Tank Level Remaining % parameter in the PCM Enhanced Evap Data list (gas only) Fuel Level Sensor % parameter in the Engine Data Fuel System display (6.6 L diesel only) Does the scan tool indicate that the Fuel Tank Level Remaining % or the Fuel Level Sensor % parameter is greater than the specified value?	98%	Go to Step 3	Go to Diagnostic Aids
3	Turn OFF the ignition. Disconnect C152. Connect a 3-amp fused jumper wire between the signal circuit of the fuel level sender and the low reference circuit of the fuel level sender (male terminal side). Turn ON the ignition, with the engine OFF. With the scan tool, observe the Fuel Level parameter. Does the scan tool indicate that the Fuel Tank Level Remaining % or the Fuel Level Sensor % parameter is less than the specified value?	4%	Go to Step 6	Go to Step 4
4	Test the signal circuit of the fuel level sender for an open, a high resistance, or a short to voltage. Refer to Circuit Testing , and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 12	Go to Step 5
5	Test the low reference circuit of the fuel level sender for an open, a high resistance, or a short to voltage. Refer to Circuit Testing , and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 12	Go to Step 9
6	Test the signal circuit of the fuel level sender for an open, a high resistance, or a short to voltage between C152 and the fuel level sender. Refer to Circuit Testing , and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 12	Go to Step 7
7	Test the low reference circuit of the fuel level sender for an open, a high resistance, or a short to voltage between C152 and the fuel level sender. Refer to Circuit Testing , and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 12	Go to Step 8
8	Inspect for poor connections at the harness connector of the fuel level sender. Refer to Testing for Intermittent Conditions and Poor Connections , and Connector Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 12	Go to Step 10
9	Inspect for poor connections at the harness connector of the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections , and Connector Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 12	Go to Step 11
10	Replace the fuel level sender. Refer to: Fuel Level Sensor Replacement in Engine Controls - 4.3 L Fuel Level Sensor Replacement in Engine Controls - 4.8 L, 5.3 L and 6.0 L Fuel Level Sensor Replacement in Engine Controls - 6.6 L Fuel Level Sensor Replacement (Rear Tank) , Fuel Level Sensor Replacement (Except Utility) in Engine Controls - 8.1 L Did you complete the replacement?	-	Go to Step 12	-
11	IMPORTANT: Program the replacement PCM. Replace the PCM. Refer to: Powertrain Control Module Replacement in Engine Controls - 4.3 L Powertrain Control Module Replacement in Engine Controls - 4.8 L, 5.3 L and 6.0 L Engine Control Module Replacement in Engine Controls 6.6 L Powertrain Control Module Replacement in Engine Controls - 8.1 L Did you complete the replacement?	-	Go to Step 12	-
12	Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset?	-	Go to Step 2	System OK