New Beetle GL L4-2.0L (AZG) (2002)
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The respective fuses of Heated Oxygen Sensor (HO2S) -G39- must be OK.
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Ignition switched off.
Test sequence (Vehicles with engine code AEG)
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Unscrew protective cover (arrows) and disconnect 4-pin harness connector (black) -1- to Heated Oxygen Sensor (HO2S) -G39- before catalytic
converter.
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Check resistance for sensor heater at connector to oxygen sensor terminal 1 + 2: Specified value: 1,0...5,0 Ohms(at room temperature)
If specified value is not obtained:
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Replace Heated Oxygen Sensor (HO2S) 1 Bank 1 -G39- before catalytic converter.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If specified value is obtained:
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Check Ground (GND) activation of oxygen sensor heater.
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Connect test box to control module wiring harness, connect test box for wiring test. See: Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring Test