Golf L4-2.0L (AEG) (1999)
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Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
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Turn off ignition.
Continuation
If the specified values are not obtained:
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Perform road test in order to free oxygen sensor of possible residues and repeat test.
Observe the safety precautions when performing a road test. See: Powertrain Management/Fuel Delivery and Air Induction/Service
Precautions/Technician Safety Information
If the specified values are still not obtained:
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Replace Heated Oxygen Sensor (HO2S) before Three Way Catalytic Converter.
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Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading
Diagnostic Trouble Codes
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Clearing
Diagnostic Trouble Codes
-
Display readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and
Readiness Codes
If DTC memory has been erased or the Engine Control Module (ECM) was disconnected from permanent battery (B+) voltage, generate the
readiness code again. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and
Readiness Codes
With Manufacturer's Scan Tool
Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC), checking
NOTE:
Vehicle must be raised before connector for oxygen sensor is accessible
Only gold plated contacts must be used to repair contacts 3 and 4 in the oxygen sensors harness connectors.
Special tools and equipment
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VAG 1551/1552 Scan Tool (ST) with VAG 1551/3 adapter cable
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VAG 1598/22 test box
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Multimeter (Fluke 83 or equivalent)
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VW1594 adapter set
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Wiring diagram
Test requirements
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Fuse 43 OK
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Battery (B+) voltage at least 11.5 V
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Exhaust system between Three Way Catalytic Converter (TWC) and cylinder head must be free of leaks
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Coolant temperature at least 85°C, See display group 04, display field 3