Golf GL L4-2.0L (AZG) (2001)
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Observe Oxygen sensor control in display zone 1. The display must fluctuate at least 2 % in the range -10.0 to 10%.
If the Oxygen sensor control in display zone 1 does not fluctuate as stated:
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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 off ignition.
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Road test vehicle to burn Oxygen sensors clean and repeat check.
Observe the valid safety precautions when carrying out a road test.
If the the specifications in display zone 1 are not obtained even after a test drive, or the value does not fluctuate by at least 2%:
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Replace the Oxygen sensor before catalyst -G39-.
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Check DTC memory, if necessary, repair any faults and then erase DTC memory.
See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes
See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Clearing Diagnostic Trouble Codes
Checking Oxygen sensor wiring
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Remove wiper arms and cowl panel:
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Connect test box VAG1598/31 to control module wiring harness. The engine control module remains disconnected.
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Remove protective cover -arrows- and separate 6-pin connector (black) -1- to Oxygen sensor before catalyst -G39-.