LEMON Manuals: Even more car manuals for everyone
Home >> Pontiac >> 2008 >> Grand Prix Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays & Gages >> Diagnostic Information and Procedures >> DTC P0463 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the fuel level sensor.
  2. Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit terminal C and ground.
    • If greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuits tests normal, replace the ECM/PCM.
  3. Install a 3A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal C. Verify the Fuel Tank Level Remaining parameter is greater than 98 percent.
    • If less than 98 percent, test the signal circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the ECM/PCM.
  4. If all circuits test normal, perform the fuel level sensor component test before replacing either the primary or secondary fuel level sensor.
scientia non olet · About LEMON Manuals