Mass Air Flow (MAF) and Intake Air Temperature (IAT) Sensor Inspection

WARNING: This page is about a different car, the 2004 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.

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 in figure, replace MAF and IAT sensor.

Intake air temperature (IAT) sensor resistance

1.80 - 2.20 k ohm at 25° C, 77° F

0.50 - 0.68 k ohm at 60° C, 140° F

Fig 1: Measuring Resistance Between Sensor Terminals

Courtesy of SUZUKI OF AMERICA CORP.