1A
Fuel Injector Circuit Check
Wiring Diagram
1. Fuel injector 2. ECM
Troubleshooting
Step Action YES NO
1
Was “Engine and Emission Control System Check” performed?
Go to Step 2.
Go to Engine and Emission Control System Check:M13A without VVT .
2
Check injector for operating sound
1) Using sound scope, check each injector for operating sound at engine cranking.
Do all 4 injector make operating sound?
Fuel injector circuit is in good condition.
Go to Step 3.
3
Dose none of 4 injectors make operating sound at Step 2?
Go to Step 4.
Check coupler connection and wire harness of injector not making operating sound and injector itself.
4
Check power circuit of injectors for open and short
Is it normal?
Check all 4 injectors for resistance respectively. If resistance is OK, substitute a known-good ECM and recheck.
Power circuit open or short.