Jetta Sedan V6-2.8L (BDF) (2003)
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Remove protective cover -arrows-and disconnect 6-pin connector (black) -1- to Heated Oxygen Sensor (HO2S) -G39-.
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Check wiring for open circuit between test box and 6-pin connector (to control module) referring to Electrical Wiring Diagrams.
Terminal 1 and socket 70
Terminal 2 and socket 71
Terminal 5 and socket 51
Terminal 6 and socket 52
Wire resistance: max. 1.5 ohms
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Additionally check wires all for short to one another.
Specification: infinity ohms
If no wiring malfunction is detected:
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Replace Oxygen Sensor (O2S)1, Bank 1 before Three Way Catalytic Converter (TWC) -G39-, item 20.
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Check DTC memory, repair malfunctions if necessary and then erase DTC memory. Refer to "Displaying and Reading Trouble Codes/With
Manufacturer Scan Tool/DTC Memory Checking and Erasing".
See: Computers and Control Systems/Testing and Inspection
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Erase learned values and adapt Motronic Engine Control Module (ECM) -J220- again.
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Read readiness code. If the DTC memory has been erased or the Motronic Engine Control Module (ECM) -J220- was disconnected from battery
positive (B+), the readiness code must be generated again. Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Reading Readiness
Code".
See: Computers and Control Systems/Testing and Inspection
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Generating Readiness Code".
See: Computers and Control Systems/Testing and Inspection
Heater Check
Heated Oxygen Sensor (HO2S), Checking
NOTE:
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The vehicle must be raised to gain access to the Oxygen Sensor (O2S) connector.
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Only gold plated terminals may be used to repair the terminals in the Oxygen Sensor (O2S) connectors.
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required