A03002
ON
THW
E2
(+)
(--)
S05502
DI--30
--
DIAGNOSTICS
ENGINE (1RZ--E)
INSPECTION PROCEDURE
HINT:
If diagnostic trouble code ”22” (water temperature sensor circuit), ”24” (intake air temperature sensor circuit),
”31” (vacuum sensor circuit) and ”41” (throttle position sensor circuit) are output simultaneously, E2 (sensor
ground) may be open.
1 Check voltage between terminals THW and E2 of engine ECU connector.
PREPARATION:
(a) Remove the glove compartment.
(b)
Turn ignition switch ON.
CHE CK:
Measure voltage between terminals THW and E2 of engine
ECU connector.
OK:
Engine Coolant Temp.
Voltage
20
˚
C (68
˚
F)
(Engine is cool)
0.5 -- 3.4 V
80
˚
C (176
˚
F)
(Engine is hot)
0.2 -- 1.0 V
OK
Check for intermittent problems
NG
2 Ch eck water t emp . sen so r.
PREPARATION:
Disconnect the water temp. sensor connector.
CHE CK:
Measure resistance between terminals.
OK:
Resistance is within acceptable zone on chart.
Engine Coolant Temp.
Resistance
20
˚
C (68
˚
F)
2 -- 3 k
Ω
80
˚
C (176
˚
F)
0.2 -- 0.4 k
Ω
NG
Replace water temp. sensor.
OK
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