Passat Sedan V6-3.6L (BLV) (2008)
Intake Air Temperature Sensor: Testing and Inspection
Diagnostic Procedures
IAT in MAF Sensor, Checking
‹› The Mass Air Flow sensor and the Intake Air Temperature sensor are combined as a unit and are serviced as an assembly.
‹› Use only gold-plated terminals when servicing terminals in the electrical harness connector of the MAF / IAT sensor (G70 / G42).
Special tools, testers and auxiliary items required
‹› multimeter.
‹› Wiring diagram.
Test procedure
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Observe safety precautions. Refer to => [ Safety Precautions ] See: Service Precautions/Safety Precautions
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Observe Clean Working Conditions. Refer to => [ Clean Working Conditions ] See: Service Precautions/Clean Working Conditions
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Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check
Start diagnosis
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Connect the scan tool.
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Engine MUST be at room temperature.
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Switch the ignition on.
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Using the scan tool, check the intake air temperature:
If the specified value was obtained:
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Fault may be intermittent. Check for proper connection, damaged wiring or loose terminals.
If the specified value was Not obtained:
Checking internal resistance
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Disconnect the MAF / IAT sensor (G70 / G42) electrical harness connector.
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Using a multimeter, check the MAF / IAT sensor (G70 / G42) terminals 3 to 4 for resistance.
Use the chart below for the specified values:
Specified values: