Beetle L4-2.0L (AEG) (2000)
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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 63: Wire resistance: max. 1.5 Ohms
Continuation for all vehicles
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Also check wires for short circuit to B+ and Ground (GND): Specified value: Infinite Ohms
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Check wire between 4-pin connector terminal 1 and Fuel Pump (FP) Relay -J17- for open circuit according to wiring diagram: Wire resistance:
max. 1.5 Ohms
If no malfunctions are found in wires:
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Replace Motronic Engine Control Module (ECM) -J220-.
With Manufacturer Scan Tool
Oxygen Sensor Heating (After Three Way Catalyst), Checking
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
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VAG 1551/1552 Scan Tool using VAG 1551/3 Adaptor cable
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VAG 1598/22 Test Box
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Fluke 83 multimeter
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VW 1594 Adaptor kit
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Wiring diagram
Requirements
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Fuse 43 must be OK
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Battery Voltage must be 11.5 Volts minimum
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Fuel pump relay must be OK
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Engine Coolant Temperature must be 85 °C minimum See Display group 04, Display field 3
Test sequence
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Connect VAG 1551/1552 Scan Tool. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks" See: Powertrain
Management/Computers and Control Systems/Testing and Inspection
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Start engine and let idle.
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Press 0 and 1 buttons to select "Engine Electronics" address word 01.