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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 2.0L (LUZ) Diesel - DTC P0430 To DTC P2080) >> Diagnostic Information and Procedures >> DTC P1248, P1249, P124A or P124B: Cylinder Injector High Control Circuit >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
WARNING:

Before working on any high voltage fuel injection system, be aware of the following procedures:

  • Do not make contact with the fuel injection harness, engine control module (ECM) or fuel injectors while the ignition is ON or RUN positions.
  • Wait 5 minutes after key OFF to allow the electronic control module (ECM) to discharge before attempting to disconnect or test engine control components.
  • Do not use the electronic control module (ECM) case as a ground while jump starting.

Failure to follow the procedure exactly as written may result in serious injury or death.

  1. Observe the DTC information with a scan tool. If DTC P2146 or P2149 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
  2. Ignition OFF.
  3. Disconnect the appropriate harness connector at the Q17 Fuel Injector.
  4. Ignition ON.
  5. Test for less than 1 V between the appropriate Fuel Injector High Control circuit terminal 2 and ground.
    • If greater than 1 V 

      Repair the short to voltage in the appropriate Fuel Injector High Control circuit.

    • If less than 1 V 
  6. Replace the K20 Engine Control Module.
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