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Fuel Injector Operation Inspection
FUEL INJECTOR OPERATION INSPECTION
| STEP |
INSPECTION |
ACTION |
| 1 |
- While cranking engine, inspect for fuel injector operation sound at each cylinder by using a soundscope.
- Is operation sound heard?
|
Yes |
Fuel injector operation is okay. |
| No |
If operation sound is not heard from all cylinders, go to Step 2.
If operation sound is not heard from some cylinders, go to Step 3. |
| 2 |
- Carry out main relay operation.
- Is main relay operation normal?
|
Yes |
Inspect following:
- Fuel injector power system related wiring harnesses and connectors
- PCM connectors
- PCM terminal voltage
- Fuel injector GND and related wiring harness and connectors
|
| No |
Repair or replace. |
| 3 |
- Change fuel injector connector of not operating fuel injector and operating fuel injector.
- Is operation sound heard?
|
Yes |
Go to the next step. |
| No |
Replace the fuel injector. |
| 4 |
- Are wiring harnesses and connectors of operating fuel injector okay? (Operating or not operating)
|
Yes |
Repair or replace. |
| No |
Inspect PCM terminal voltage for fuel injector signal. |