Jetta Wagon L4-1.8L Turbo (AWP) (2005)
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Check wiring between test box and 2-pin connector -1- for open circuit using wiring diagram.
Contact 1 + socket 85
Contact 2 + socket 108
Wire resistance: max. 1.5 Ohms
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Check both wires for short to battery positive.
If no malfunction in wire is detected:
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Perform resistance measurement on intake air temperature (IAT) sensor -2- -G42-.
Scale A shows resistance values for temperature range 0 to 50 degrees C and scale B the values for temperature range 50 to 100 degrees C.
Examples:
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30 degrees C is in range A and corresponds to a resistance of 1.5 to 2.0 k Ohms
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80 degrees C is in range B and corresponds to a resistance of 275 to 375 Ohms
If the specification is not obtained:
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Replace intake air temperature (IAT) sensor -G42-.
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Check DTC Memory, if necessary, repair any malfunctions and then Erase DTC Memory. See: Testing and Inspection/Reading and Clearing
Diagnostic Trouble Codes/Clearing Diagnostic Trouble Codes/With Manufacturer's Scan Tool
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Read readiness code. If DTC memory has been erased or engine control module was disconnected from permanent positive, readiness code must
be generated again.
See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If there is no malfunction in the wiring and the resistance measurement values are OK.
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Replace engine control module.