Golf GL L4-2.0L (AZG) (2001)
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Set multimeter for resistance measurement and connect it to terminals 1 + 2 at connector for oxygen sensor. Check oxygen sensor heater for
continuity.
If a short circuit is found in the oxygen sensor heater:
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Replace Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) - G130-.
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Check DTC memory, repair any malfunctions and then erase DTC memory, Checking and erasing DTC memory.
If oxygen sensor heater has continuity:
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Set the multimeter to voltage measurement and connect it to terminal 1 (connector for Engine Control Module -ECM-) + Ground (GND).
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Start engine, and let run at idle.
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Measure voltage supply:
Specification: 11.0 to 14.5 V
If there is no voltage:
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Check wire connection from terminal 1 to Fuel Pump (FP) relay -J17- according to wiring diagram.
If specified value is obtained: