Touareg V8-4.2L (BHX) (2004)
If indication jumps to approx. -40° C:
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End diagnosis and switch ignition off.
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Replace Mass Air Flow (MAF) Sensor (G70).
‹› The Intake Air Temperature (IAT) Sensor (G42) is a component of the Mass Air Flow (MAF) Sensor (G70) and cannot be replaced individually.
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Erase DTC memory of Engine Control Module (ECM) , Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code.
If indication remains at approx. 140° C:
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End diagnosis and switch ignition off.
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Check wires according to wiring diagram.
Checking wiring
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Connect test box to control module wiring harness , connect test box for wiring test.
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Check wires between test box and 5-pin connector for open circuit according to wiring diagram.
Terminal 1+socket 26
Terminal 3 + socket 27
Wire resistance: max. 1.5 ohms