Toyota T100 1996 Service Manual page 388

DI−124
OBD II scan tool (excluding TOYOTA hand−held tester):
1 Check operation of fuel pump.
ON
For M/T
For A/T
FC (+)
Fuel Return Hose
NG
2 Check for ECM power source circuit (See page DI−115).
OK
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS
PREPARATION:
(a) Remove the right cowl side trim (See page MF−50).
(b) Turn the ignition switch ON.
FC (+)
CHECK:
(a) Connect between terminal FC of ECM connector and
body ground.
(b) Check for fuel pressure in the fuel return hose when it is
pinched off.
OK:
There is pressure in the fuel return hose.
HINT:
At this time, you will hear a fuel return flowing noise.
OK
A00688
NG
− ENGINE (3RZ−FE)
Go to step 7.
Repair or replace.