Golf GLS L4-1.8L Turbo (AWW) (2001)
Display: Htg.aC.ON, Htg.aC.OFF (alternating)
If the display does not indicate as described:
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Press -> key.
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Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.
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Switch ignition off.
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Remove protective cover -arrows- and separate 4-pin connector (brown) -1- to Oxygen Sensor (O2S) behind Three Way Catalytic Converter
(TWC) (G130).
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Set multimeter to check resistance and connect it to contacts 1 + 2 of oxygen sensor connector. Check oxygen sensor heating for continuity.
If it is determined that oxygen sensor heating has an open circuit:
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Replace the Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC) (G130).
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Check DTC Memory, if necessary, repair any malfunctions and then Erase DTC Memory. Refer to "Displaying and Reading Trouble Codes/With
Manufacture Scan Tool/Check DTC Memory (Function 02)" See: Testing and Inspection
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Read readiness code. If DTC memory has been erased or engine control module was disconnected from permanent positive, readiness code must
be generated again: Refer to "Monitors, Trips and/or Drive Cycle/ Reading Readiness Code" See: Testing and Inspection
Engine code AWW, Refer to "Monitors, Trips and/or Drive Cycle/Generating Readiness Code" See: Testing and Inspection
Engine code AWP, Refer to "Monitors, Trips and/or Drive Cycle/Generating Readiness Code" See: Testing and Inspection
If oxygen sensor heating has continuity: