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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 28 (Engine Controls And Fuel - 1.8L (LKN) - DTC P0010 To P0459) >> 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: Cylinder Injector >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the harness connector at the appropriate Q17 Fuel Injector, ignition ON.
  2. Test for B+ between the supply circuit terminal 2 and ground.
    • If less than B+ 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for infinite resistance between the supply 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 supply circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω
    4. Test for infinite resistance between the supply circuit terminal 2 and the control circuit terminal 1.
      • If less than infinite resistance, repair the short between the circuits.
      • If infinite resistance, replace the K20 Engine Control Module.
    • If B+ 
  3. Ignition OFF, connect a test lamp between the supply circuit terminal 2 and the control circuit terminal 1.
  4. Engine cranking or running.
  5. Verify the test lamp flashes ON and OFF.
    • If the test lamp does not flash 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for infinite resistance between the control circuit terminal 1 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 control 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 control circuit terminal 1 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K20 Engine Control Module.
    • If the test lamp flashes 
  6. Test or replace the Q17 Fuel Injectors.
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