New Beetle L4-2.0L (AZG) (2003)
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Set multimeter to measure resistance and check sensor heating resistance at connector to oxygen sensor terminals 1 + 2. Check oxygen sensor
heating for continuity.
If an open circuit is detected in the oxygen sensor heating:
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Replace oxygen sensor after catalyst (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
Manufacturers Scan Tool/DTC Memory Checking and Erasing" See: Testing and Inspection
If the oxygen sensor heating has continuity:
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Set multimeter to measure voltage and connect to terminal / (connector to engine control module) and Ground.
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Start engine and run at idle speed.
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Measure voltage supply:
Specification: 11.0 to 14.5 V
If the specification is not obtained:
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Check wiring between terminal 1 and fuel pump relay (J17) using wiring diagram.
Checking voltage supply