Jetta SportWagen L5-2.5L (CBUA) (2009)
Intake Air Temperature Sensor: Testing and Inspection
Intake Air Temperature 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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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 values are obtained:
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Fault is intermittant. Check for proper connection, damaged wiring or loose terminals.
If the specified value is not obtained:
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Continue the test according to the following table:
Checking Component and wiring
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Disconnect the MAF / IAT sensor (G70 / G42) electrical harness connector - arrow -.