TROUtiLESHOOTlNG
WITH
SST
4A
No. 09 Code illumination
(Water Therm0
Sensor)
Repair or replace
connector
NO
Is resistance
of the water thermo
sensor
OK?
Resistance:
Coolant
temp
-2oTi
(-49)
20%
(66°F)
40%
(104v)
60%
(140°F)
80°C
(176OF)
Resistance
NO
14.6-17.6
W
2.21-2.69
W
Replace
water thermo
sen.sor
1.0-l
.3 kQ
1
0.49-0.67
kQ
0.29-0.35
kQ
I
I
YES
Is there continuity
between
water thermo
sensor
and
engine
control
unit?
Water thermo
sensor
1
Engine
control
unit
A (LR wire)
I
21
8 (LY wire)
2c
NO
PC: Open circuit in tiring
harness
from water
thermo
sensor to engine
control
unit
I
YES
Are engine
control
unit (21) a
tages OK?(Refer
to page 4A
PC: Short circuit in wiring
harness
J
YES
PC: Engine
control
unit malfunction
4A-15