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 5386 > < Oxygen Sensor (O2S) and Oxygen Sensor Control Before Three Way Catalytic Converter (TWC), Checking|Page 5384
Page 3
background image

-

Disconnect 6-pin harness connector (black) to Heated Oxygen Sensor (HO2S) -G39- (-2-).

-

Set multimeter for resistance measurement and connect it to terminals 3 + 4 at connector for oxygen sensor. Check oxygen sensor heater for
continuity.

Specified value: 2.5 to 10 ohms (at room temperature)

Continued for all vehicles

If an open circuit is found in the oxygen sensor heater:

-

Replace Heated Oxygen Sensor (HO2S) -G39- before catalytic converter

-

Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Testing and Inspection/Scan Tool
Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data

-

Generate readiness code

If oxygen sensor heater has continuity:

-

Check voltage supply and wiring

Checking voltage supply and wiring

Vehicles with engine code AEB

Oxygen Sensor (O2S) and Oxygen Sensor Control Before Three Way Catalytic Converter (TWC), Checking|Page 5386 > < Oxygen Sensor (O2S) and Oxygen Sensor Control Before Three Way Catalytic Converter (TWC), Checking|Page 5384