Supra L6-3.0L DOHC (7M-GE) (1990)
Connecting Fuel Pressure Gauge
5. Wipe off any gasoline that may have escaped when the fuel pipe was disconnected and reconnect negative battery terminal. Turn on the ignition
switch.
6. Using a service wire, short terminals +B and FP on the engine check connector. The fuel pump should operate and cause the pressure gauge to
deflect.
Shorting Fuel Pump Test Terminals
Fuel Pressure:
38 - 44 PSI (265 - 304 kPa)
7. If pressure is low, check fuel pump output and/or fuel filter for restrictions. If pressure is high, refer to FUEL PRESSURE REGULATOR/FUEL
RAIL and test components.
8. If there is zero fuel pressure, check fusible links, fuses (EFI 15A, IGN 7.5A), EFI Main Relay, Fuel Pump Relay and circuit wiring. Refer to
CHASSIS ELECTRICAL DIAGRAMS for circuit schematics.
9. If no problem is found with the above components, go to the gas tank and listen for sound from the electric fuel pump.
10. If sound is heard, confirm that there is fuel in the tank.
11. If no sound is heard, remove the fuel pump from the tank, (refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES), and
bench test the fuel pump with battery current.
12. If fuel pump does not operate, replace the fuel pump.
13. After repairs are made, remove all test equipment from engine, start engine and check for fuel leaks.