volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 2032 > < Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 2030
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Disconnect the 4-pin electrical harness connector -1 - from the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 .

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Using a Multimeter, check the component terminals 3 to 4 for voltage. 

Specified value: 0.400 to 0.500 Volts

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Switch ignition off.

If specified value is not obtained:

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

If specified value is obtained:

Testing of oxygen sensor wires

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Using the Multimeter, check the following wiring connections for an open circuit.

O2S Sensor electrical

Motronic Engine Control Module (ECM) J623

harness connector

electrical connector T121 terminal or test box

terminal

socket

Pin 3

10

Pin 4

11

Pin 2

6

Pin 1

Fuse 15 (on fuse panel B)

Specified resistance 1.5 Ohms max.

If the specification is not obtained:

Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 2032 > < Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 2030