Jetta SportWagen L5-2.5L (CBUA) (2009)
Specified resistance: 1.5 ohms Max.
If the specification was not obtained:
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Check the wiring for an open, high resistance or short circuit to Battery (+).
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
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Replace the Motronic Engine Control Module (ECM) (J623). Refer to --> [ Motronic Engine Control Module, Replacing ] .
°Testing if display near 140 C:
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Disconnect the MAF / IAT sensor (G70 / G42) electrical harness connector - arrow -.
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Using the scan tool, check the intake air temperature:
If indication jumps to approx. -40 °C to -46 °C:
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Switch ignition off.
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Replace the MAF / IAT sensor (G70 / G42)
If the indication remains at approx. 140 °C:
Checking wiring