Grand Vitara 2WD V6-2.7L (2006)
Air Flow Meter/Sensor: Testing and Inspection
Mass Air Flow (MAF) and Intake Air Temperature (IAT) Sensor On-Vehicle Inspection
MAF Sensor Signal Inspection
NOTE:
Before performing this inspection, be sure to read the Precautions of ECM Circuit Inspection.
1. Remove ECM cover from bracket.
2. With ignition switch OFF, disconnect MAF and IAT sensor connector (1).
3. Connect voltmeter between C13-2 terminal (2) and C13-3 terminal (3) of MAF and IAT sensor connector (1) disconnected.
4. Turn ignition switch ON and check that sensor power supply is battery voltage. If not, check if wire harness is open or connection is poor.
5. Turn ignition switch OFF and connect connector to MAF and IAT sensor.
6. Check MAF sensor output voltage referring to Inspection of ECM and Its Circuits. If MAF sensor output voltage is not as specified, cause may lie
in wire harness, coupler connection, MAF and IAT sensor or ECM.
Intake Air Temperature (IAT) Sensor Inspection
Reference: Mass Air Flow (MAF) and Intake Air Temperature (IAT) Sensor Removal and Installation
CAUTION:
Do not heat up MAF and IAT sensor more than 100 degrees C (212 degrees F). Otherwise, MAF and IAT sensor will be damaged.
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Check sensor O-ring for damage and deterioration. Replace as necessary.
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Blow hot air to temperature sensing part (1) of MAF and IAT sensor (2) using hot air drier (3) and measure resistance between IAT sensor
terminals (5) and (6) while heating air gradually. If measured resistance does not show such characteristic as shown, replace MAF and IAT sensor.