New Beetle Turbo S L4-1.8L Turbo (AWP) (2002)
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When servicing terminals in harness connector of Heated Oxygen Sensor (HO2S), use only gold-plated terminals.
Recommended special tools and equipment
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VAG1526 multimeter or VAG1715 multimeter
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VAG1594 connector test kit
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Wiring diagram
Test requirements
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The respective fuses of Heated Oxygen Sensor (HO2S) -G39- must be OK.
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Battery voltage must be at least 11.5 volts.
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All electrical consumers such as, for example, lights and rear window defroster must be switched off.
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Parking brake must be engaged or else daylight driving lights will be switched on.
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If vehicle is equipped with an A/C system, it must be switched off.
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Ground (GND) connections between engine and chassis must be OK.
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Exhaust system must be properly sealed between catalytic converter and cylinder head.
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Coolant temperature must be at least 80 degrees C, Diagnostic mode 1: Check measuring values; PID 5, Coolant temperature. See: Testing and
Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 1: Check Measured Values
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Oxygen sensor heaters for oxygen sensors before catalytic converter must be OK, check. See: Testing and Inspection/Component Tests and
General Diagnostics/Oxygen Sensor, Checking/Oxygen Sensor Before Catalyst, Checking/Heater Check
Function test
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Select the following output of oxygen sensor signals and check whether the specified values are being reached, Diagnostic mode 5: Check output
of oxygen sensor signals. See: Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 5: Check
Output of Oxygen Sensor Signals
If specified values are obtained:
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End diagnosis and switch ignition off.
If specified values are not obtained:
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Test oxygen sensor wires.
Checking oxygen sensor wires
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Unscrew protective cover (arrows) and disconnect 6-pin harness connector (black) -1- to Heated Oxygen Sensor (HO2S) -G39- before catalytic
converter.
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Connect test box to control module wiring harness, connect test box for wiring test.