Passat V6-2.8L (ATQ) (2004)
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Measure resistance for sensor heater at connector to oxygen sensor terminal 1 + 2.
Specified value: max: 200 Ohms
Continuation for all vehicles
If specified value is not obtained:
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Replace the respective oxygen sensor:
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Heated Oxygen Sensor (HO2S) -G39-, bank 1, item 1
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Heated Oxygen Sensor (HO2S) 2 -G108-, bank 2, item 15
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles
and Readiness Codes
If specified value is obtained:
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Check Ground (GND) activation of the respective oxygen sensor heater.
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Connect test box to control module wiring harness, connect test box for wiring test. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box,
Connecting For Wiring Test
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Check wires between test box and 4-pin connector to Engine Control
Module (ECM) for open circuit according to wiring diagram.
Wire resistance: max: 1.5 Ohms
Vehicles with engine code AHA
Vehicles with engine code ATQ