New Beetle GLS L4-1.8L Turbo (AWV) (2001)
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Connect VAG 1598/31 test box to control module wiring harness. Motronic Engine Control Module (ECM) -J220- is not connected by this action.
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Check wiring for open circuit between test box and 4-pin connector to Motronic control module using Electrical Wiring Diagram.
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terminal 3 + socket 68
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terminal 4 + socket 69
Wire resistance: Max. 1.5 Ohms
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Check wiring at connector terminals 3 + 4 for short circuit to terminals 1 + 2 using Electrical Wiring Diagram.
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terminal 4 and socket 68
Specification: Infinity Ohms
If no wiring malfunction is found:
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Replace Motronic Engine Control Module (ECM) -J220-.
With Generic Scan Tool
Check Oxygen Sensor And Oxygen Sensor Regulation Behind Catalytic Converter
NOTE:
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Vehicle must be raised before connector for oxygen sensor is accessible.
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When servicing terminals 3 and 4 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