LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 2.0L (LTG) - DTC P0010 To DTC P0333 >> Diagnostic Information and Procedures >> DTC P0201-P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P1248, P1249, P124A, P124B, P2147, P2148, P2150, P2151, P2153, P2154, P2156, or P2157: Injector Control >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, all vehicle systems OFF, disconnect the 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 less than infinite, repair the short to ground in the circuit.
      • 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 1V between the Q17 Fuel Injector control + circuit and ground.
    • If 1V or greater 
    1. Disconnect the harness connector of the Q17 Fuel Injector, ignition ON.
    2. Test for less than 1V between the Q17 Fuel Injector control + circuit and ground.
      • If 1V or greater, repair the short to voltage on the circuit.
      • If less than 1V, repair the short to voltage on the control - circuit.
    • If less than 1V 
  5. Ignition OFF.
  6. Test for less than 3Ω between the Q17 Fuel Injector control + circuit and control - circuit.
    • If 3Ω or greater 
    1. Disconnect the harness connector of the Q17 Fuel Injector.
    2. Test for less than 2Ω on the control + circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω
    3. Test for less than 2Ω on the control - circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω, replace the Q17 Fuel Injector.
    • If less than 3Ω 
  7. Replace the K20 Engine Control Module.
scientia non olet · About LEMON Manuals