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Using WDS Or Equivalent
- Perform the fuel pump operation inspection.
- Connect the WDS 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
Courtesy of MAZDA MOTORS CORP.