New Beetle L4-2.0L (AVH) (2005)
1) If a temperature is indicated which is below the ambient temperature of sensor, first check sensor wires for contact resistance. Note that while the
vehicle is standing still the sensor might warm up due to radiant heat.
If specified value is obtained:
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Remove intake air hose between Mass Air Flow (MAF) sensor and throttle valve control module.
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Remember intake air temperature value.
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Spray sensor (arrow) with commercially available chilling spray and watch temperature value. The temperature must decrease.
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End diagnosis and switch ignition off.
If intake air temperature does not drop:
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Replace Mass Air Flow (MAF) sensor -G70- with Intake Air Temperature (IAT) sensor -G42-.
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Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. See: Testing and Inspection/Scan Tool
Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
Continuation of test if indication is approx. -40 degrees C or approx. -46 degrees C
Vehicles with engine code AEG, AVH, AZG
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Disconnect 5-pin connector from Mass Air Flow (MAF) sensor -G70- with Intake Air Temperature (IAT) sensor -G42- (arrow).
Vehicles with engine code BDC, BEV, BGD