volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

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

electrical connector T121 terminal or test box socket

Pin 4

Fuse 21 (on fuse panel B)

Pin 3

5

Pin 6

70

Pin 2

51

Pin 1

52

Pin 5

71

Specified resistance 1.5 Ohms max.

If the specification is not obtained:

-

Check the wiring for a short circuit to Battery positive (+) or an open circuit.

-

If necessary, repair the wiring connection.

If no malfunctions are found in wiring:

-

Replace Heated Oxygen Sensor (HO2S) -G39-.

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and

Procedures/Diagnostic Mode 03: Interrogating Fault Memory

2. If necessary, erase the DTC memory. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and

Procedures/Diagnostic Mode 04: Reset/Delete Diagnostic Data

3. If the DTC memory was erased, generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and

Inspection/Monitors, Trips, Drive Cycles and Readiness Codes

-

End of diagnosis.

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