Passat Sedan V6-3.6L (BLV) (2008)
Checking internal resistance
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Using a multimeter, check the Oxygen Sensor Heater Bank 2 Sensor 1 (Z28) terminals 3 to 4 for resistance.
Specified value: 2.5 to 10.0 ohms (at approx. 20° C)
If the specification was not obtained:
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Replace HO2S Oxygen Sensor Bank 2 Sensor 1 (G108). Refer to the Repair Information.
If the specification was obtained:
Checking voltage supply
Switch the ignition on.
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Using a multimeter, check the Oxygen Sensor Heater Bank 2 Sensor 1 (Z28) electrical harness connector terminal to ground for voltage.
Specified value: above 9.50 V.
Switch the ignition off.
If the specification was not obtained:
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Check the Oxygen Sensor Heater Bank 2 Sensor 1 (Z28) 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 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.