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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 117 (Engine Controls And Fuel - 2.0L (LTG) - DTC P0340-DTC P31BF And Symptoms) >> Diagnostic Information and Procedures >> DTC P157A or P16D7-P16D9 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition/Vehicle - Off
  2. Verify the condition does not exist: - LooseGround connection @ G120
    • If a condition exists 

      Repair or replace as necessary.

    • Go to next step: If no condition exists 
  3. Disconnect the electrical connector:K111 Fuel Pump Driver Control Module
  4. Test for infinite resistance between the test points:Terminal 16 @ Component harness & Ground
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • Go to next step: If infinite resistance 
  5. Disconnect the electrical connector: X4 @ K9 Body Control Module
  6. Test for less than 1 V between the test points:Terminal 16 @ 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 
  7. Test for less than 2 ohms between the test points:Terminal 16 @ Component harness & Control circuit terminal 22 @ Control module harness
    • If 2 ohms or greater 

      Repair the open/high resistance in the circuit.

    • Go to next step: If less than 2 ohms 
  8. Replace the component:K9 Body Control Module
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