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Home >> GMC >> 2017 >> Canyon SL >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> DTC P0460: Fuel Tank Level Sensor >> Circuit/System Testing

Circuit/System Testing

NOTE:

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

  1. Ignition OFF, and all vehicle systems OFF, disconnect the harness connector at the B46 fuel level sensor. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 5 Ω between the low reference circuit terminal B and ground.
    • If 5 Ω or greater 
    1. Ignition OFF, disconnect the X1 harness connector at the K20 ECM.
    2. Test for less than 2 Ω in the low reference circuit end to end.
      • If 2 Ω or greater, repair the open or high resistance in the circuit.
      • If 2 Ω or less replace the K20 ECM.
    • If less than 5 Ω 
  3. Ignition ON.
  4. Test for 4.8-5.2 V between the signal circuit terminal A and ground.
    • If not between 4.8-5.2 V 
    1. Ignition OFF, disconnect the X1 harness connector at the K20 ECM.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω
    4. Ignition ON.
    5. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K20 ECM.
    • If between 4.8-5.2 V 
  5. Replace the B46 fuel level sensor.
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