Malibu L4-2.4L (2010)
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Injector Ckt Short Volts Test Status
‹› Each parameter should toggle between OK and Not Run or Not Run and OK.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at a fuel injector.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal A and ground.
‹› If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the
ignition circuit fuse is open, test or replace the fuel injector.
3. Ignition OFF, connect a J 44603 - Injector Test Lamp between the control circuit terminal B and the ignition circuit terminal A of each fuel
injector one at a time.
4. Engine cranking, the test lamp should flash for each injector.
‹› If the test lamp is always ON, test the appropriate control circuit for a short to ground. If the circuit tests normal, replace the engine control
module (ECM).
‹› If the test lamp is always OFF, test the appropriate control circuit for a short to voltage or an open/high resistance. If the circuit tests normal,
replace the ECM.
5. If all circuits test normal, test or replace the fuel injector. Refer to Fuel Injector Solenoid Coil Test (See: Computers and Control Systems/Testing
and Inspection/Component Tests and General Diagnostics/Fuel Injector Solenoid Coil Test).
Repair Instructions
Perform the Diagnostic Repair Verification (See: Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and
Associated Procedures/Verification Tests and Procedures) after completing the diagnostic procedure.
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Fuel Injector Replacement (See: Service and Repair)
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Control Module References (See: Testing and Inspection/Programming and Relearning) for replacement, setup, and programming
