Passat Sedan V6-3.6L (BLV) (2008)
If the specified values were Not obtained:
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Replace the MAF / IAT sensor (G70 / G42) Refer to the Repair Information.
If the specified values are obtained, continue the test according to the following table:
°°Testing if display approx. - 40 C to - 46 C:
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Disconnect the MAF / IAT sensor (G70 / G42) electrical harness connector.
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Using a jumper wire, connect the MAF / IAT sensor (G70 / G42) electrical harness connector terminals 4 to 5.
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Check the value indicated on the scan tool display.
If indication jumps to approx. 140 °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 indication remains at approx. -40 °C or -46 °C:
Checking wiring
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 MAP / IAT sensor (G70 / G42) electrical harness connector terminal 5 to the Motronic Engine Control Module
(ECM) (J623) electrical harness connector T94 terminal 60 for an open circuit or a short to voltage, refer to the wiring diagram.
Specified values: Circuit continuity; 1.5 ohms max; Circuit voltage = 0 volts when disconnected from ECM (with ignition on).
If the specified value was Not obtained: