Fuel Injector Operation Inspection
WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DESCRIPTION AND POSSIBLE CAUSE
| 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: Go to the next step. Some cylinders not heard: Go to Step 3. |
||
| 2 | Perform main relay operation inspection. Is main relay operation normal? |
Yes | Inspect the following:
|
| No | Repair or replace malfunctioning parts. | ||
| 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. | ||
| 4 | Are wiring harness and connectors of not operation fuel injector normal? (Open or short) | Yes | Inspect PCM terminal voltage of fuel injector signal. |
| No | Repair or replace malfunctioning parts. |