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4-1-37 EI SYSTEM DIAGNOSIS
IAT sensor resistance
Intake Air Temp.
-40
(-40
)
-20
(-4
)
0
(32
)
20
(68
)
40
(104
)
60
(140
)
80
(176
)
100
(212
)
120
(248
)
130
(266
)
Tester knob indication : Resistance (
Is the resistance OK?
Lg or GR wire open or shorted to
ground, or poor
connection of ECU coupler.
If wire and connection are OK,
intermittent trouble or faulty
YES
ECU.
Recheck each terminal and wire
harness for open circuit and
poor connection.
Replace the IAT sensor with a new
NO
one.
Resistance
44.642
5%
14.958
5%
5.734
5%
2.438
5%
1.141
5%
0.579
5%
0.315
5%
0.182
5%
0.111
5%
0.088
5%
)
or
B8
B10
Gray
54
Black
ECU Coupler
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