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Home >> Chevrolet >> 2019 >> Cruze Premier, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P0016-P054F)) >> Diagnostic Information and Procedures >> DTC P0231, P0232, or P023F >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
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: X350
  3. Ignition - On/Vehicle - In Service Mode
  4. Perform the scan tool control function: Fuel Pump Enable - On
  5. Test for less than 10 ohms between the test points: Low Reference circuit terminal 18 & Ground
    • If 10 ohms or greater 
    1. Disconnect the electrical connector: K111 Fuel Pump Driver Control Module
    2. Test for less than 2 ohms between the test points: Low Reference circuit terminal 18 @ X350 & Terminal 16 @ Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K111 Fuel Pump Driver Control Module
    • Go to next step: If less than 10 ohms 
  6. Connect a test lamp between the test points: Control circuit terminal 15 & Low Reference circuit terminal 18
  7. Perform the scan tool control function: Fuel Pump Enable - On and Off

    Verify the test lamp turns On and Off.

    • If the test lamp is always Off 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector: K111 Fuel Pump Driver Control Module
    3. Test for infinite resistance between the test points: Control circuit terminal 15 @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 ohms between the test points: Control circuit terminal 15 @ Component harness & Terminal 8 @ Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K111 Fuel Pump Driver Control Module
    • If the test lamp is always On 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    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 15 @ Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component: K111 Fuel Pump Driver Control Module
    • Go to next step: If the test lamp turns On and Off 
  8. Test or replace the component: A7 Fuel Pump and Level Sensor Assembly
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