Passat Sedan V6-3.6L (BLV) (2008)
If the specification was obtained:
Checking voltage supply
Start the engine.
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Using a multimeter, check the Oxygen Sensor Heater Bank 1 Sensor 1 (Z19) electrical harness connector terminal to ground for voltage.
Specified value: above 9.5 V.
Switch the engine off.
If the specification was not obtained:
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Check the HO2S Oxygen Sensor Bank 1 Sensor 1 (G39) electrical harness connector terminal 4 to fuse 33 in Fuse Panel B for high resistance, a
short to ground, or an open circuit.
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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 specification was obtained:
Checking ground activation
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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Using a multimeter, check the HO2S Oxygen Sensor Bank 1 Sensor 1 (G39) electrical harness connector to the Engine Control Module (ECM)
(J623) electrical harness connector T94 terminal for resistance.
Specified value: 1.5 ohms max.