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Home >> Chevrolet >> 2010 >> Traverse LT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 510 (Engine Controls And Fuel - 3.6L (LLT) - DTC P0340 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Fuel Injector Circuit Diagnosis >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, all vehicle systems OFF. Disconnect the X3 harness connector at the K20 Engine Control Module. It may take up to 2 min for all vehicle systems to power down.
  2. Test for infinite resistance between the appropriate Q17 Fuel Injector control + circuit and ground.
    • If less than infinite resistance 
    1. Disconnect the harness connector of the Q17 Fuel Injector.
    2. Test for infinite resistance between the Q17 Fuel Injector control + circuit and ground.
      • If infinite resistance
    3. Test for infinite resistance between the Q17 Fuel Injector control - circuit and ground.
      • If less than infinite, repair the short to ground in the circuit.
      • If infinite, replace the Q17 Fuel Injector.
    • If infinite resistance 
  3. Ignition ON.
  4. Test for less than 1 V between the Q17 Fuel Injector control + circuit and ground.
    • If 1 V or greater 
    1. Disconnect the harness connector of the Q17 Fuel Injector, ignition ON.
    2. Test for less than 1 V between the Q17 Fuel Injector control + circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, repair the short to voltage on the control - circuit.
    • If less than 1 V 
  5. Ignition OFF.
  6. Test for less than 3 Ω between the Q17 Fuel Injector control + circuit and control - circuit.
    • If 3 Ω or greater 
    1. Disconnect the harness connector of the Q17 Fuel Injector.
    2. Test for less than 2 Ω on the control + circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω
    3. Test for less than 2 Ω on the control - circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the Q17 Fuel Injector.
    • If less than 3 Ω 
  7. Replace the K20 Engine Control Module.
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