Passat V6-2.8L (ATQ) (2004)
Vehicles with engine code AHA
Vehicles with engine code ATQ
Continuation for all vehicles
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Also check wires for short circuit to B+ and to Ground (GND).
Specified value: Infinite ohms
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Check wire between 4-pin connector terminal 1 and Fuel Pump (FP) Relay -J17- for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms
If no malfunctions are found in wires:
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Replace Motronic Engine Control Module (ECM) -J220-.
With Generic Scan Tool
Oxygen sensor heater for oxygen sensors before Three Way Catalytic Converter (TWC), checking
NOTE: When servicing terminals in harness connector of Heated Oxygen Sensor (HO2S), use only gold-plated terminals.
Recommended special tools and equipment
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V.A.G 1526 multimeter or V.A.G 1715 multimeter
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V.A.G 1594 Connector test set
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Wiring diagram
Test requirements
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The respective fuses of Heated Oxygen Sensor (HO2S) -G39- and Heated Oxygen Sensor (HO2S) 2 -G108- must be OK:
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Ignition switched off.
Test sequence
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Disconnect 4-pin harness connector to the respective oxygen sensor: