LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 1991 >> 929 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System (Fuel Injection) >> Fuel Pump Circuit (Except NAVAJO)

Fuel Pump Circuit (Except NAVAJO)

  1. Turn ignition on. Connect terminals of Yellow fuel pump check connector with a jumper wire. See FUEL PUMP CHECK CONNECTOR (YELLOW) LOCATIONS TABLE  . On Miata, Navajo, Protege and 323, 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. On all models, airflow meter grounds circuit opening relay and operates fuel pump whenever airflow is present.
  3. Circuit opening relay and fuel pump relay are controlled by the computer. For additional testing, see I - SYS/COMP TESTS or appropriate G - TEST W/ CODES article in the ENGINE PERFORMANCE section.
scientia non olet · About LEMON Manuals