Toyota Land Cruiser 1988 Repair Manual page 176

EFI SYSTEM -Troubleshooting with Volt/ Ohmmeter
FJ-45
California vehicles only
ECU
+B
.1'""""""'
( + B1)
EGR Gas Temp. Sensor
EGA
Valv el
~p
THG
"'--i
E2
1
E1
F12580
CD CD
No voltage between ECU terminals THG and E2.
(IG S/W ON)
®
Check that there is voltage between ECU terminal + B
( + B1) and body ground. {IG S/W ON)
OK
~NO
Fl2946
Refer to No. 1 .
(See page Fl-30)
Check wiring between ECU terminal E1 and body ground.
OK
~BAD
Refer or replace.
BAD
I
.I
Check EG R system.
I
I Repair or replace.
OK
FI0312
@
Check EG R gas temp. sensor.
(See page Fl-79)
BAD
!
OK
Replace EG R gas Check wiring between ECU and
temp. sensor.
EG R gas temp. sensor.
!·OK
!
BAD
Try another ECU. Repair or replace.