Jetta Sedan L5-2.5L (BGP) (2005)
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Remove the Intake Air Temperature (IAT) Sensor (G42)24 Removal and Installation.
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Spray the Intake Air Temperature (IAT) Sensor (G42) with a commercially available cool spray while observing the temperature value on the scan
tool.
The temperature value must decrease.
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End of diagnosis and switch the ignition off.
If the intake air temperature does not decrease:
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Replace the Intake Air Temperature (IAT) Sensor (G42)24 Removal and Installation.
If the intake air temperature does decrease:
Checking internal resistance
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Disconnect the Intake Air Temperature (IAT) Sensor (G42) electrical harness connector - arrow -.
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Using a multimeter, check the Intake Air Temperature (IAT) Sensor (G42) terminals 1 to 3 for resistance.
Use the chart below for the specified values:
‹› Area A: Resistance values 0 to 50° C.
‹› Area B: Resistance values 50 to 100° C.
Specified values: