A6 Quattro Wagon V6-3.2L (BKH) (2006)
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Operate the starter briefly (engine can also start)
Specified value: Battery voltage, possibly fluctuating.
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Switch the ignition off.
If the specification is not obtained:
If the manufacturers test box is being used, perform the following step.
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Install the test box (VAG1598/42) => Fuel Injection and Ignition 24 Diagnosis and Testing.
If the manufacturers test box is not being used, perform the following step.
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Remove the Engine Control Module (ECM) (J623). Refer to=> [ Engine Control Module, Replacing ] See: Engine Control Module/Service and
Repair/Engine Control Module, Replacing.
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) electrical harness connector to the Engine Control Module (ECM) (J623) electrical
harness connector for resistance.
‹› Oxygen Sensor (O2S) Heater (-Z29-) (bank 1, sensor 2):
‹› Oxygen Sensor (O2S) Heater (-Z30-) (bank 2, sensor 2):
Specified value: 1.5 ohms max.
If the specification is not obtained:
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Check the wiring for a short circuit to Battery positive (+) or an open circuit.
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If necessary, repair the wiring connection.
If no malfunctions are detected: