Fuel Pump Operation Inspection

WARNING: This page is about a different car, the 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Connecting the wrong check connector terminal may possibly cause malfunction. Carefully connect the specified terminal only.

Short the check connector terminal F/P to body GND using a jumper wire.
Remove the fuel-filler cap.
Turn the ignition switch to ON position.
Verify that the fuel pump operation sound is heard.
- If no operation sound heard, proceed to next step.
Measure voltage at harness side fuel pump connector terminal B.

Specification

B+ (Ignition switch at on)

If the voltage is as specified, inspect the following:
- Fuel pump continuity
- Fuel pump GND
- Wiring harness between fuel pump relay and PCM terminal 4P
If not as specified, inspect the following:
- Fuel pump relay
- Wiring harness connector (Main relay - fuel pump relay - fuel pump.)