Toyota T100 1996 Service Manual page 288

DI−24
2 Check voltage of mass air flow meter power source.
ON
1 (+)
BE6653
P23803
OK
3 Check voltage between terminals VG of ECM connector and body ground.
For M/T
For A/T
P23804
P23805
NG
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS
A00055
VG (+)
VG (+)
A00044
− ENGINE (3RZ−FE)
PREPARATION:
(a) Disconnect the mass air flow meter connector.
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminal 1 of mass air flow meter con-
nector and body ground.
OK:
Voltage: 9 − 14 V
NG Check for open in harness and connector be-
tween EFI main relay (Marking : EFI) and mass
air flow meter (See page IN−26).
PREPARATION:
(a) Remove the right cowl side trim (See page MF−50).
(b) Start the engine.
CHECK:
Measure voltage between terminal VG of ECM connector and
body ground while engine is idling.
OK:
Voltage:
1.0 − 1.5 V (A/C switch OFF)
OK Check and replace ECM (See page IN−26).