Toyota 3S-GE Repair Manual page 213

ENGINE — EFI SYSTEM EG-199
No. I Terminals Trouble I Condition I STD voltage
1 I THW - E2 No voltage I IG sw ON I Coolant temperature sooc moor) I 0.2 -1.0 v
Water Temp. Sensor 0 +B
' . THW 0 THW
ECU
.
E2 OE2
E1
H3572
ECU I THW
(D There is no voltage between ECU terminals THW and E2.
G) (IG SW ON)
_m\
N\
Check that there is voltage between ECU terminal + B and body
Voltmeter ' * 1 1 i .
OK NO
E Refer to +B — E1
Iv V ® ground (IG SW ON)
trouble section (No.1).
P°°"° (See page EG-192)
®
ECU Check wiring between ECU terminal E1 and body ground. I
IQ
l
4
IS§IIE' EII I OK BAD
Vohmeter Check water temp sensor
- @ (see page EG275) Repair or replace.
i - BAD
1 l < >K
Replace water Check wiring between ECU and water
temp. sensor. temp. sensor.
P17779
BAD
ll
F Ohmmeter
O
rI~I'I~I-II-I-I-Ia
-'-"1
P01627
@ Try another ECU. I Repair or replace.
VO5423