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Home >> Chevrolet >> 2018 >> Malibu LS >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> Bumpers And Fascias >> Diagnostic Information And Procedures >> DTC P05AE Or P151F >> Circuit/System Testing

Circuit/System Testing

  1. Ignition/Vehicle Off and all vehicle systems Off, disconnect the harness connector(s) at the active grille air shutter actuator(s). It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 Ω between the ground circuit and ground.
    • If 10 Ω or greater 
    1. Ignition/Vehicle Off.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 Ω 
  3. Ignition On/Vehicle in Service Mode.
  4. Verify a test lamp illuminates between the ignition circuit and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition/Vehicle Off.
    2. Test for less than 2 Ω in the ignition circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse. Refer to POWER MODE MISMATCH .
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition/Vehicle Off.
    2. Test for infinite resistance between the ignition circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
    • Go to next step: If the test lamp illuminates 
  5. Ignition/Vehicle Off, disconnect the harness connector at the K20 Engine Control Module.
    1. Test for infinite resistance between the LIN Serial Data Bus circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    2. Test for less than 2 Ω in the LIN Serial Data Bus circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • Go to next step: If less than 2 Ω
    3. Test for less than 1 V between the LIN Serial Data Bus circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
  6. Test or replace the M60B Active Grille Air Shutter 2 Motor Module.
  7. Verify DTCs P05AE, P151F or U1511 are not set while operating the vehicle under the conditions for setting the DTC.
    • If the DTC is set 

      Replace the K20 Engine Control Module.

    • Go to next step: If the DTC is not set 
  8. All OK.
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