6E2-40 ENGINE AND EMISSION CONTROL SYSTEM (M13 ENGINE)
Mass air flow (MAF) and intake air temperature (IAT)
sensor inspection
• 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.
Intake air temperature sensor resistance
CAUTION:
Do not heat up the MAF and IAT sensor more than 100°C
(212°F). Otherwise, the MAF and IAT sensor is damaged.
Temperature Resistance
20°C (68°F) 2.21 – 2.69 k
Ω
60°C (140°F) 0.493 – 0.667 k
Ω
[A]: Resistance
[B]: Temperature
[C]: Lower limit
[D]: Nominal
[E]: Upper limit
5. Temperature gauge
200
6832 104 140 176
40 60 80
(2.45)
(0.58)
[A]
[B]
[C]
[D]
[E]
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