LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2012 >> Verano >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> DTC P0461-P0464 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the A7 fuel pump and level sensor assembly.
  2. Test for less than 30 Ω at the low reference circuit terminal 3.
    • If greater than the specified range, test the low reference circuit for short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
  3. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal 4 and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
  4. If all circuits test normal, replace the A7 fuel pump and level sensor assembly.
scientia non olet · About LEMON Manuals