volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Positive Crankcase Ventilation > < Leak Detection Pump, Evaporative System|Diagrams|Page 2504
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Terminal 2 + socket 25
Wire resistance: max: 1.5 Ohms

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Also check wires for short circuit to each other.
Terminal 3 + socket 25
Terminal 3 + socket 80
Terminal 2 + socket 80
Specification: Infinity Ohms

If no malfunctions are found in wires:

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Replace Leak Detection Pump (LDP) -V144-

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Perform work procedure "Procedure to follow after interruption of voltage supply":

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Read readiness code:

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If DTC memory was erased or the Engine Control Module (ECM) was disconnected from the continuous B+ supply, the readiness code must be
re-generated:

Positive Crankcase Ventilation > < Leak Detection Pump, Evaporative System|Diagrams|Page 2504