Fuel Injector Operation Inspection
FUEL INJECTOR OPERATION INSPECTION CHART
| STEP | INSPECTION | RESULTS | ACTION |
|---|---|---|---|
| 1 | While cranking the engine, inspect for fuel injector operation sound at each cylinder using a soundscope. Is operation sound heard? |
Yes | Fuel injector operation is normal. |
| No | All cylinders not heard:
Some cylinders not heard:
|
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| 2 | Perform main relay No. 1 operation inspection. (See Main Relay No. 1 Operation Inspection .) Is main relay No. 1 operation normal? |
Yes | Inspect the following:
Repair or replace the malfunctioning part according to the inspection results. |
| No | Repair or replace the malfunctioning part according to the inspection results. | ||
| 3 | Switch fuel injector connector of not operating fuel injector with operating fuel injector. Is operation sound heard? |
Yes | Go to the next step. |
| No | Replace the fuel injector. See FUEL INJECTOR REMOVAL/INSTALLATION article. |
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| 4 | Are wiring harness and connectors of not operation fuel injector normal? (Open or short) | Yes | Inspect PCM terminal voltage of fuel injector signal. Repair or replace the malfunctioning part according to the inspection results. |
| No | Repair or replace the malfunctioning part according to the inspection results. |