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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P040B - P204D)) >> Diagnostic Information And Procedures >> DTC P1029, P102A, Or P102B: Fuel Pump Phase U-V-W Circuits >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: K111 Fuel Pump Driver Control Module
  3. Ignition - On/Vehicle - In Service Mode
  4. Test for less than 1 V between the test points:
    • Control circuit terminal 8 & Ground
    • Control circuit terminal 9 & Ground
    • Control circuit terminal 24 & Ground
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  5. Ignition/Vehicle & All vehicle systems - Off
  6. Test for infinite resistance between the test points:
    • Control circuit terminal 8 & Ground
    • Control circuit terminal 9 & Ground
    • Control circuit terminal 24 & Ground
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • Go to next step: If infinite resistance 
  7. Disconnect the electrical connector: A7 Fuel Pump and Level Sensor Assembly
  8. Test for less than 2 Ω between the test points:
    • Control circuit terminal 8 @ Control module harness & Terminal 1 @ Component harness
    • Control circuit terminal 9 @ Control module harness & Terminal 2 @ Component harness
    • Control circuit terminal 24 @ Control module harness & Terminal 3 @ Component harness
    • If 2 Ω or greater 

      Repair the open/high resistance in the circuit:

    • Go to next step: If less than 2 Ω 
  9. Replace the component: A7 Fuel Pump Driver Control Module
  10. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

    Verify the DTC does not set.

    • If the DTC sets 

      Replace the component: K111 Fuel Pump and Level Sensor Assembly

    • Go to next step: If the DTC does not set 
  11. All OK.