volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5066 > < Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5064
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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) G130.

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Erase DTC memory for Motronic Engine Control Module (ECM) J220.  See: Computers and Control Systems/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: Computers and Control Systems/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: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring Test

Vehicles with engine code BGP

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Check wires between test box and 4-pin connector for open circuit according to wiring diagram.

Contact

Test box socket

3

68

4

69

Wiring resistance: max. 1.5 Ohms

Vehicles with engine code BGQ

Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5066 > < Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5064