volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Oxygen Sensor (O2S) and Oxygen Sensor Control Before Three Way Catalytic Converter (TWC), Checking|Page 1648 > < Oxygen Sensor (O2S) and Oxygen Sensor Control Before Three Way Catalytic Converter (TWC), Checking|Page 1646
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Specified value: 0.40 to 0.50 Volts

-

Switch ignition off.

If specified value is not obtained:

-

Test oxygen sensor wires.

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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.

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Generate readiness code.  Refer to "Monitors, Trips and/or Drive Cycle/Readiness Code, Generating".  See: Powertrain Management/Computers
and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes

If specified value is obtained:

-

Replace Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-, item 6 .

Checking oxygen sensor wires

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Connect test box to control module wiring harness, connect test box for wiring test.  Refer to "Scan Tool Connecting/Test Box, Connecting For
Wiring Test".  See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble
Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring Test

Vehicles with engine code AEB

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Disconnect 4-pin harness connector (black) to Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- (-1-).

-

Check wires between test box and 4-pin connector (to control module) for open circuit according to wiring diagram.
Terminal 3 + socket 51
Terminal 4 + socket 52
Wire resistance: max: 1.5 Ohms

Vehicles with engine code ATW

Oxygen Sensor (O2S) and Oxygen Sensor Control Before Three Way Catalytic Converter (TWC), Checking|Page 1648 > < Oxygen Sensor (O2S) and Oxygen Sensor Control Before Three Way Catalytic Converter (TWC), Checking|Page 1646