Passat Syncro Wagon V6-2771cc 2.8L DOHC (AHA) (1998)
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To reach this harness connector, remove coolant reservoir attachment screws and tilt coolant reservoir to the side. The coolant hoses remain
connected.
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Bank 1 = Cylinder bank 1, in direction of travel, right
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Bank 2 = Cylinder bank 2, in direction of travel, left
Vehicles with engine code AHA
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Measure resistance for sensor heater at connector to oxygen sensor terminal 1 + 2.
Specified value: 0.0 to 19.9 Ohms
Vehicles with engine code ATQ
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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: 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: 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