Toyota Land Cruiser 1988 Repair Manual page 168

EFI SYSTEM -Troubleshooting with Volt/ Ohmmeter Fl-37
No. Terminals Trouble
Condition STD Voltage
5 THW- E2 No voltage
Ignition switch Coolant temperature
so·c
0.1-1.0V
ON
(176.F)
ECU
+B
Water Temp. Sensor
( + B1)
r-
I
THW
E2
..
'--
E1
":::~
FI0487
CD
CD
There is no voltage between ECU terminals THW 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
Refer to No. 1.
FI0332
(See page
F1~30)
Check wiring between ECU terminal E1 and
body ground.
OK
l
BAD
@Check water temp. sensor.
(See page Fl-77)
Repair or replace.
BAD
l
OK
Replace water
Check wiring between ECU and
temp. sensor. water temp. sensor.
1
OK
~
BAD
Try another ECU.
Repair or replace.