LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2008 >> STS V >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays & Gages >> Diagnostic Information and Procedures >> DTC P2068 (4.6L and 4.4L) >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the secondary fuel level sensor.
  2. Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit terminal D and ground.
    • If greater than 1 ohm, test the circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
  3. Ignition ON, install a 3-amp fused jumper between the signal circuit terminal A and the low reference circuit terminal D. Verify the scan tool 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 circuit tests normal, replace the ECM.
  4. If all circuits test normal, perform the fuel level sensor component test before replacing the secondary fuel level sensor.
scientia non olet · About LEMON Manuals