Fuel Pump 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.

Remove the fuel-filler cap.
Switch the ignition to ON.
Turn the fuel pump relay from off to on using the FP PID and inspect if the operation sound is heard.
- If no operation sounds is heard, proceed to next step.
Measure voltage at wiring harness side fuel pump connector terminal B
Specification

B+ (Ignition 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 1BG
- If not as specified, inspect the following:
  - Fuel pump relay
  - Wiring harness connector (Main relay - fuel pump relay - fuel pump.)