New Beetle GLS L4-2.0L (AVH) (2001)
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Connect test box V.A.G 1598/31 to control module wiring harness. The engine control module is not connected by this action.
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Check wiring between test box and 2-pin connector for open circuit using wiring diagram.
G61:
G66:
Terminal 1 + socket 106
107
Terminal 2 + socket 99
99
Wire resistance: Max. 1.5 Ohms
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Additionally check wires for short to one another.
Specification: Infinity Ohms
If no malfunctions in wiring are detected:
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Loosen knock sensor and tighten again to 20 Nm.
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Perform a test drive again.
During the road test the following operating conditions must be fulfilled:
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The coolant temperature must exceed 80 °C
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When the temperature is reached, the operating conditions must be attained several times:
Idling
Part throttle
Enrichment
Full throttle
Over run
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At full throttle engine speed must exceed 3500 RPM.
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Again check control module DTC memory.
If the malfunction is still present:
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Replace knock sensor(s).