Using M-MDS or equivalent
WARNING: This page is about a different car, the 2008 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
- Perform the fuel pump operation inspection.
- Connect the M-MDS or equivalent to the DLC-2.
- Start the engine and idle it.
- Verify that the rotation sound of the fuel pump (higher frequency wave) goes higher when turning fuel pump speed control relay from off to on using the simulation function FPC.
- If it cannot be verified, inspect the following and repair or replace the malfunctioning part.
- Stuck fuel pump speed control relay
- Wiring harnesses, connectors between fuel pump speed control relay and PCM
- Fuel pump resistor
- Wiring harnesses open circuit between fuel pump speed control relay and fuel pump
- If it cannot be verified, inspect the following and repair or replace the malfunctioning part.