volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 3492 > < With Manufacturer's Scan Tool|Page 3490
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Connect test box VAG1598/31 to control module wiring harness. The engine control module remains disconnected.

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Check wiring for open circuit between test box and 2-pin connectors using wiring diagram.

-G61-:

-G66-:

Contact 1+socket 

106

107

Contact 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 fault is detected in the pipes:

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Loosen knock sensor and tighten again to 20 Nm.

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Test drive vehicle 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
Idling
Part throttle
Enrichment
Full throttle
Overrun
must be attained several times.

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At wide open throttle the speed must exceed 3500 RPM.

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Again check the control module DTC memory.

If the malfunction is still present:

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