volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Oxygen Sensor and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 4781 > < Oxygen Sensor and Oxygen Sensor Control Before Catalytic Converter, Checking
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Remove protective cover (arrows) and disconnect 6-pin harness connector to Heated Oxygen Sensor (HO2S) -G39- before catalytic converter.

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Connect test box to control module wiring harness. connect test box for wiring test. See: Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring Test

Vehicles with engine code APH, AWP, AWV

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Check wires between test box and 6-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.

Terminal 1 + socket 70
Terminal 2 + socket 71
Terminal 5 + socket 51
Terminal 6 + socket 52

Wire resistance: max. 1.5 Ohms

Vehicles with engine code BKF, BNU

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Check wires between test box and 6-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.

Terminal 1 + socket 52

Oxygen Sensor and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 4781 > < Oxygen Sensor and Oxygen Sensor Control Before Catalytic Converter, Checking