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Home >> Chevrolet >> 2021 >> Malibu Premier >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> Bumpers And Fascias >> Diagnostic Information and Procedures >> DTC P059F or P151E >> Circuit/System Testing

Circuit/System Testing

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: M96A Active Grille Air Shutter 1 Actuator
  3. {If equipped} Disconnect the electrical connector: M96B Active Grille Air Shutter 2 Actuator
  4. Test for less than 10 ohms between the test points: Ground circuit terminal @ Active Grille Air Shutter Actuator & Ground
    • If 10 ohms or greater 
    1. Disconnect the ground connection: G101
    2. Test for less than 2 ohms between the test points: Ground circuit terminal @ Component harness & Terminal G101
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  5. Ignition - On/Vehicle - In Service Mode
  6. Verify a test lamp turns On between the test points: Ignition circuit @ Component harness & Ground
    • If the test lamp does not turn On and the circuit fuse is OK 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Test for less than 2 ohms between the test points: Ignition circuit @ Component harness & Output terminal @ M96 Fuse
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Verify the fuse is OK and there is voltage at the fuse.

        Or

      • If less than 2 ohms - Refer to: Power Mode Mismatch
    • If the test lamp does not turn On and the circuit fuse is open 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Test for infinite resistance between the test points: Ignition circuit @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: M96A Active Grille Air Shutter 1 Actuator
    • Go to next step: If the test lamp turns On 
  7. Ignition/Vehicle - Off
  8. Disconnect all LIN devices that share the same LIN serial data circuit.
  9. Test for less than 10 ohms between the test points: LIN Bus - Circuit @ Component harness & Ground
    • If less than 10 ohms 
    1. Disconnect the electrical connector: K20 Engine Control Module
    2. Test for infinite resistance between the test points: LIN Bus - Circuit @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: K20 Engine Control Module
    • If greater than 10 ohms 
    1. Disconnect the electrical connector: K20 Engine Control Module
    2. Ignition - On/Vehicle - In Service Mode
    3. Test for less than 1 V between the test points: LIN Bus - Circuit @ Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    4. Ignition/Vehicle - Off
    5. Test for less than 2 ohms between the test points: LIN Bus - Circuit @ Component harness & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • Go to next step: If less than 2 ohms
  10. Test or replace the component: M96A Active Grille Air Shutter 1 Actuator
  11. Operate the vehicle within the Conditions for Running the DTC. Verify the DTC does not set.
    • If the DTC sets 

      Replace the component: K20 Engine Control Module

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