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(a)
3
5
1
2
6.0
[E]
[A]
[C]
4.0
[D]
2.0
0
20
40
60
32
68
104
140
[B]
• Tighten MAF and IAT sensor screws to specified torque.
Tightening torque
MAF sensor screw (a): 2.5 N·m (0.25 kg-m, 1.8 lb-ft)
• Connect MAF and IAT sensor coupler securely.
Mass air flow (MAF) and intake air temperature (IAT)
sensor inspection
CAUTION:
Do not heat up the MAF and IAT sensor more than 100°C
(212°F). Otherwise, the MAF and IAT sensor is damaged.
• Check sensor O-ring (1) for damage and deterioration.
Replace as necessary.
• Blow hot air to temperature sensing part (2) of MAF and IAT
sensor (3) using hot air drier (4) and measure resistance
between sensor terminals while heating air gradually.
If measured resistance does not show such characteristic as
shown, replace MAF and IAT sensor.
4
Intake air temperature sensor resistance
Temperature
[A]: Resistance
[B]: Temperature
[C]: Lower limit
[D]: Nominal
[E]: Upper limit
5. Temperature gauge
(ºC)
80
(ºF)
176
ENGINE AND EMISSION CONTROL SYSTEM 6E1-37
20°C (68°F)
40°C (104°F)
80°C (176°F)
0.309 – 0.432 kΩ
Resistance
2.33 – 2.97 kΩ
1.08 – 1.47 kΩ
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