Passat Sedan V6-3.6L (BLV) (2008)
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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 the specified value was obtained:
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Using a multimeter, check terminal 4 of the MAF / IAT sensor to engine ground.
Specified value: 1.5 ohms Max
If the specified value was Not obtained:
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Check the wiring for an open circuit or high resistance.
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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 ground circuit:
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Replace the Motronic Engine Control Module (ECM) (J623). Refer to the Repair Information.
°Testing if display approx. 140 C:
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Disconnect the MAF / IAT sensor (G70 / G42) electrical harness connector.
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Check the value indicated on the scan tool display.
If indication jumps to approx. -40° C or -46° C:
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Switch ignition off.
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Replace the MAF / IAT sensor (G70 / G42) Refer to the Repair Information.
If the indication remains at approx. 140° C
If the manufacturers test box is being used, perform the following step.
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Install the test box.
If the manufacturers test box is not being used, perform the following step.
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Remove the Motronic Engine Control Module (ECM) (J623). Refer to the Repair Information.
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Disconnect the ECM harness.
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Using a multimeter, check the MAF / IAT sensor (G70 / G42) electrical harness connector terminal 5 to engine ground.
Specified value: OL or no continuity.
If the specified value was Not obtained:
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Check the wiring for a short circuit to ground.
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If necessary, repair the faulty wiring connection.
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If no malfunction is detected in the wiring and the sensor resistance was OK:
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Replace the Motronic Engine Control Module (ECM) (J623). Refer to the Repair Information.
Final procedures
