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Home >> GMC >> 2017 >> Terrain SL, Gas >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> DTC P0461-P0464, P2066, P2067, or P2068: Fuel Level Sensor >> Circuit/System Testing

Circuit/System Testing

NOTE:

Circuit/System Verification must be performed before proceeding with Circuit/System Testing.

  1. Ignition OFF, disconnect the harness connector at the appropriate fuel level sensor.
  2. Test for less than 30 Ω between the low reference circuit terminal 3 and ground.
    • If greater than the specified range, test the low reference circuit for 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 Engine Control Module.
    • 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 Engine Control Module.
  4. If all circuits test normal, test or replace the appropriate fuel level sensor.
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