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Fuel Injector Operation Inspection
FUEL INJECTOR OPERATION INSPECTION CHART
| STEP |
INSPECTION |
ACTION |
| 1 |
- While cranking engine, inspect for fuel injector operation sound at each cylinder using a soundscope.
- Is operation sound heard?
|
Yes |
Fuel injector operation is okay. |
| No |
All cylinders not heard:
Some cylinders not heard:
|
| 2 |
- Carry out main relay operation inspection.
- Is main relay operation normal?
|
Yes |
Inspect following:
- Fuel injector power system related wiring harness and connectors.
- PCM connectors.
- Fuel injector GND and related wiring harness and connectors.
|
| No |
Repair or replace malfunctioning part. |
| 3 |
- Switch fuel injector connectors of inoperative fuel injector and operating fuel injector.
- Is operation sound heard?
|
Yes |
Go to next step. |
| No |
Replace fuel injector. |
| 4 |
- Are wiring harness and connectors of inoperative fuel injector okay? (Open or short circuit.)
|
Yes |
Inspect PCM terminal voltage of fuel injector signal. |
| No |
Repair or replace malfunctioning part. |