Fuel Pump (Low-pressure Side) Operation Inspection: Notes

WARNING: This page is about a different car, the 2016 Mazda CX-3. However, it is still accessible from the selected car via links, so may be relevant.

Connect the M-MDS to the DLC-2.
Remove the fuel-filler cap.
Switch the ignition ON (engine off).
Turn the fuel pump relay from off to on using the FP simulation item and inspect if the operation sound of the fuel pump is heard. (Refer to ON-BOARD DIAGNOSTIC TEST .)
- If operation sound is heard, fuel pump is normal.
- If no operation sound is heard, proceed to the next step.
Measure the voltage at the wiring harness side fuel pump unit terminal A with the FP PID turned on.
- If the voltage is as specified, inspect the following:
  - Fuel pump continuity
  - Fuel pump ground
  - Wiring harness between the fuel pump relay and PCM terminal 2AQ
- If not as specified, inspect the following:
  - Fuel pump relay (Refer to RELAY INSPECTION .)
  - Wiring harness connector (Battery-Fuel pump relay-Fuel pump control module-Fuel pump unit)
Specification
- 8.0-11.5 V (Ignition switched ON)