volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5898 > < Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5896
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Disconnect 4-pin harness connector (black) - 1 - to Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC),G130.

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Check resistance for Oxygen Sensor (O2S) Heater 1(behind Three Way Catalytic Converter (TWC)) Z59 at connector to Oxygen Sensor (O2S
behind Three Way Catalytic Converter (TWC),G130 terminal 1 + 2.

Specification: 1.0 to 20.0 Ohms (at room temperature)

If specification is not obtained:

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Replace Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130

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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 obtained:

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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

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

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Wiring resistance: max. 1.5 Ohms

Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5898 > < Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5896