Circuit/System Testing
- Ignition OFF, disconnect the X101 fuel injector multi-way connector.
- Ignition ON, verify that a J 35616-200:
Test Light illuminates between the ignition circuit terminal A ECM harness side 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.
- Ignition OFF, connect a J 35616-200:
Test Light between the ignition circuit terminal A and the control circuit ECM harness side, of the appropriate injector listed below:
- Injector 1 terminal D
- Injector 2 terminal E
- Injector 3 terminal F
- Injector 4 terminal B
- Injector 5 terminal C
- 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 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.
- Ignition OFF, measure for 10-15 ohms on the engine harness side of X101 between the ignition circuit terminal A and the control circuit of the appropriate injector listed below:
- Injector 1 terminal D
- Injector 2 terminal E
- Injector 3 terminal F
- Injector 4 terminal B
- Injector 5 terminal C
- If the resistance is not within the specified range, test for a short to ground or an open/high resistance between X101 and the appropriate fuel injector harness connector. If the circuits test normal, test or replace the affected fuel injector.