New Beetle L4-1.8L Turbo (AWP) (2003)
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Remove inner plenum chamber cover, left.
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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 3-pin connector using Electrical Wiring Diagram.
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terminal 1 + socket 108
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terminal 2 + socket 90
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terminal 3 + socket 82
Wire resistance: Max. 1.5 Ohms
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Additionally check wires for short to one another.
If no wiring malfunction is found:
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Remove sensor and check sensor wheel for secure fit, damage and run-out.
NOTE: There is a larger gap on the sensor wheel. This gap is the reference mark and does not mean that the sensor wheel is damaged.
If no malfunction is detected on sensor wheel:
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Replace Motronic Engine Control Module (ECM) -J220-.
With Generic Scan Tool
Check Engine Speed (RPM) sensor
Function
The Engine Speed (RPM) Sensor -G28- detects engine speed and reference marks. Without an engine speed signal, the engine will not start. If the engine
speed signal fails while the engine is running, the engine will stop immediately.
Recommended special tools and equipment