Fuel Pump Operation Inspection

WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Remove the fuel-filler cap.
Turn the ignition switch to the ON position.
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 C (California emission regulation applicable model), A (except for California emission regulation applicable model).
1. 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 1AR (with immobilizer system), 1AQ (without immobilizer system).
- If not as specified, inspect the following:
  - Fuel pump relay.
  - Wiring harness connector (Main relay - fuel pump relay - fuel pump.)