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Home >> Pontiac >> 2005 >> Grand Prix GTP >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> DTC P0463 >> Test Description

Test Description

The number below refers to the step number on the diagnostic table.

  1. 3:  This step tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.
DTC P0463

Step Action Values Yes No
Schematic Reference: Instrument Cluster Schematics 
Connector End View Reference: ENGINE CONTROLS CONNECTOR END VIEWS in Engine Controls - 5.3 L, Powertrain Control Module (PCM) Connector End Views in Engine Controls 3.8 L or to Inline Harness Connector End Views
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With the scan tool, observe the Fuel Tank Level Remaining parameter in the powertrain control module (PCM) or the engine control module (ECM) evaporative emission (EVAP) Data list.
Does the scan tool indicate that the Fuel Tank Level Remaining parameter is greater than the specified value?		 98% Go to Step 3  Go to Diagnostic Aids
3 
  1. Turn OFF the ignition.
  2. Disconnect the fuel level sensor.
  3. Connect a 3-amp fused jumper wire between the signal circuit of the fuel level sensor and the low reference circuit of the fuel level sensor on the male terminal side.
  4. Turn ON the ignition, with the engine OFF.
  5. With a scan tool, observe the Fuel Tank Level Remaining parameter.
Does the scan tool indicate that the Fuel Tank Level Remaining 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 sensor for an open, for a high resistance, or for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 5 
5 Test the low reference circuit of the fuel level sensor for an open or for a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 7 
6 Inspect for poor connections at the harness connector of the fuel level sensor. 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 10  Go to Step 8 
7 Inspect for poor connections at the harness connector of the PCM/ECM. 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 10  Go to Step 9 
8 Replace the fuel level sensor. Refer to Fuel Level Sensor Replacement in Engine Controls - 3.8 L or Fuel Level Sensor Replacement in Engine Controls - 5.3 L.
Did you complete the replacement?		 - Go to Step 10  -
9 Replace the PCM/ECM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 10  -
10
  1. Use the scan tool in order to clear the DTCs.
  2. 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
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