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Home >> Cadillac >> 2005 >> DeVille Protection Series >> 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. 4:  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 Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2 Is DTC P0651 also set in the powertrain control module (PCM)? - Go to DTC P0651 in Engine Controls - 4.6L Go to Step 3 
3
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Fuel Level Sensor parameter in the PCM evaporative emission (EVAP) DATA, data list.
Does the Fuel Level Sensor parameter display greater than the specified value?		 3 V Go to Step 4  Go to Diagnostic Aids
4 
  1. Turn OFF the ignition.
  2. Disconnect C420.
  3. Connect a 3-ampere fused jumper between the signal circuit of the fuel level sensor and the low reference circuit of the fuel level sensor, on the female terminal side of the connector.
  4. Turn ON the ignition, with the engine OFF.
  5. With a scan tool, observe the Fuel Level Sensor parameter.
Does the Fuel Level Sensor parameter display less than the specified value?		 0.4 V Go to Step 7  Go to Step 5 
5 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 to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 6 
6 Test the low reference circuit of the fuel level sensor for an open, for a high resistance, or for a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 10 
7 Test the signal circuit of the fuel level sensor for an open, for a high resistance, or for a short to voltage between C420 and the fuel level sensor. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 8 
8 Test the low reference circuit of the fuel level sensor for an open, for a high resistance, or for a short to voltage between C420 and the fuel level sensor. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 9 
9 Inspect for poor connections at the harness connector of the fuel level sensor. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 11 
10 Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 12 
11 Replace the fuel level sensor. Refer to Fuel Level Sensor Replacement in Engine Controls - 4.6L.
Did you complete the replacement?		 - Go to Step 13  -
12 Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 13  -
13
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC.
Does the DTC reset?		 - Go to Step 3  System OK
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