Toyota Supra 1990 Manual page 245

SST
EFI SYSTEM - Fuel System
ON-VEHICLE INSPECTION
1. CHECK FUEL PUMP OPERATION
(a) Turn the ignition switch ON.
HINT: Do not start the engine.
FI-71
(b) Using SST, connect terminals
+
Band Fp of the check
connector.
SST 09843-18020
(c) Check that there is pressure in the fuel return hose.
HINT: At this time, you will hear fuel return noise.
(d) Remove SST.
SST 09843-18020
(e) Turn the ignition switch OFF.
If there is no pressure, check the following parts:
• Fusible links
• Fuses (EFI, IGN)
• EFI main relay
• Fuel pump
• ECU
• Wiring connections
2.
INSPECT FUEL PRESSURE
(a) Check the battery voltage above 11 volts.
(b) Disconnect the cable from the negative (-) terminal
of the battery.
(c)
(7M-GE)
Disconnect the cold start injector connector.
(d)
(7M-GE)
Disconnect the cold start injector tube.
• Place a suitable container or shop towel under the
cold start injector tube.
• Remove the union bolt and two gaskets, and dis-
connect cold start injector tube.
HINT: Slowly loosen the union bolt.