A00157
ON
ECM
Engine Coolant
Temp. Sensor
5V
E2
E1
2
1
THW
E2
THW
E5
E5
4
9
BE6653
FI7057
P24656
A00158
ON
Engine Coolant
Temp. Sensor
ECM
5V
4
9 E2
E1
THW
BE6653
FI7054
E5
E5
DI
−
32
−
DIAGNOSTICS
ENGINE
1996 LAND CRUISER (RM451U)
3
Check for open in harness or ECM.
PREPARATION:
(a)
Remove instrument panel speaker No.1 panel
(See page
SF
−
65
).
(b)
Connect between terminals THW and E2 of ECM connec-
tor.
HINT:
Engine coolant temp. sensor connector is disconnected. Be-
fore checking, do a visual and contact pressure check for the
ECM connector (See page
IN
−
28
).
(c)
Turn ignition switch ON.
CHECK:
Read temperature value on the OBD II scan tool or TOYOTA
hand
−
held tester.
OK:
Temperature 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 ECM.
If OK, replace ECM (See page
IN
−
28
).
4
Check for short in harness or ECM.
PREPARATION:
(a)
Disconnect the engine coolant temp. sensor connector.
(b)
Turn ignition switch ON.
CHECK:
Read temperature value on the OBD II scan tool or TOYOTA
hand
−
held tester.
OK:
Temperature value:
−
40
°
C (
−
40
°
F)
OK
Replace engine coolant temp. sensor.
NG
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Version 1.00 - 12/21/2010