LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 1994 >> MX-3 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Engine Controls - Basic Testing) >> Fuel System >> Fuel Pressure (Fuel Injection) >> Fuel Pump Circuit

Fuel Pump Circuit

WARNING: This page is about a different car, the 1994 Mazda MX-6 and 1994 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition on. Attach jumper wire to test connector terminal Fp and to ground in the diagnostic connector, next to battery.
  2. Listen for fuel pump operating sound. If there is no sound, check main fuse, circuit operating relay, fuel pump and all electrical connections. PCM grounds circuit opening relay and operates fuel pump whenever distributor or crank angle sensor signals are present. On other models, airflow meter grounds circuit opening relay whenever airflow is present.
  3. If circuit opening relay does not work, proceed to SYSTEM/COMPONENT TESTS article or appropriate G - TESTS W/ CODES article in the ENGINE PERFORMANCE section below.
scientia non olet · About LEMON Manuals