GTI L4-2.0L (AEG) (2000)
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Check resistance for sensor heater at connector to oxygen sensor terminal 1 + 2. Specified value: 1.0 to 20.0 Ohms (at room temperature)
If specified value is not obtained:
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Replace Oxygen Sensor (O2S) 2 Bank 1 Behind Three Way Catalytic Converter (TWC) -G130-:
Vehicles with engine code AEG, item 10,
Vehicles with engine code AVH, AZG, item 13.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Testing and Inspection/Scan Tool
Testing and Procedures/With Generic Scan Tool/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
Vehicles with engine code AEG
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Check wires between test box and 4-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
Terminal 2 + socket 28
Wire resistance: max: 1.5 Ohms
Vehicles with engine code AVH, AZG
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Check wires between test box and 4-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.