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BE6653
FI7057
P24389
A02348
Engine ECU
ON
Water Temp. Sensor
2
1
4
9
THW
E2
5V
E1
E5
E5
THW
E2
BE6653
A00372
A00373
ON
Water Temp. Sensor
2
1
4
9
Engine ECU
E5
E5
THW
E2
5V
E1
--
DIAGNOSTICS
ENGINE (2RZ--FE, 3RZ--FE)
DI--109
3 Check for open in harness or engine ECU.
PREPARATION:
(a) Remove the glove compartment
(b)
Connect between terminals THW and E2 of engine ECU
connector.
HINT:
Water temp. sensor connector is disconnected. Before check-
ing, do a visual and contact pressure check for the engine ECU
connector
(c)
Turn ignition switch ON.
CHE CK:
Read temp. value on the hand--held tester.
OK:
Temp. value: 140
˚
C (284
˚
F) or more
OK
Open in harness between terminals E2 or THW,
repair or replace harness.
NG
Confirm good connection at engine ECU.
If OK, replace engine ECU.
4 Check for short in harness or engine ECU.
PREPARATION:
(a)
Disconnect the water temp. sensor connector.
(b)
Turn ignition switch ON.
CHE CK:
Read temp. value on the hand--held tester.
OK:
Temp. value: -- 40
˚
C (-- 40
˚
F)
OK
Replace water temp. sensor.
NG
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Pages From Supplement
3RZ-F,3RZ-FE