Fuel Pump Speed Control Operation Inspection
WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
- Perform the fuel pump operation inspection.
- Verify that fuel pump relay operation sound is heard, while cranking the engine.
- If operation sound is not heard, inspect the following:
- Fuel pump relay
- Wiring harnesses and connectors (Main relay-fuel pump relay-PCM terminal 4M)
- If operation sound is not heard, inspect the following:
- Remove the fuel-filler cap.
- Verify that the fuel pump unit operation sound frequency at cranking is higher than during idle.
- If it cannot verified, inspect for the following:
- Fuel pump resister
- Fuel pump relay
- Wiring harnesses and connectors (open circuit at fuel pump relay terminal C-fuel pump terminal B)
- If it cannot verified, inspect for the following: