volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5891 > < Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5889
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Remove right vehicle floor covering - arrows -.

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Disconnect 4-pin harness connector (black) - 1 - to Oxygen Sensor (O2S (in Center Three Way Catalytic Converter (TWC), Bank 1 G465.

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Connect multimeter V.A.G 1526 for voltage measurement to terminals 3 + 4 of connector to Motronic Engine Control Module (ECM) J220 and
measure primary voltage.
Specification: 0.400 to 0.500 V

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Switch off ignition.

If specification is obtained:

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Replace Oxygen Sensor (O2S (in Center Three Way Catalytic Converter (TWC) G465.

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Erase DTC memory for Motronic Engine Control Module (ECM) J220.  See: Testing and Inspection/Scan Tool Testing and Procedures/With
Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data

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Generate readiness code.  See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes/Readiness Code, Generating

If specification is not obtained:

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Test oxygen sensor wires.

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Connect test box to Motronic Engine Control Module (ECM) J220 wiring harness.  See: Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring Test

Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5891 > < Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5889