volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Leak Detection Pump, Evaporative System|Testing and Inspection|Page 3069 > < Leak Detection Pump, Evaporative System|Testing and Inspection|Page 3067
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Pull the 3 pin connector off the diagnosis pump (V144).

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Connect the VAG 1527 B voltage tester between connector contact 3 (positive) and engine Ground.

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Start engine and run at idling speed: The LED must light up.

If the LED does not light up:

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Switch off ignition.

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Check the wire between connector contact 3 and central electrics for open circuit using wiring diagram: Wire resistance: max. 1.5 Ohms

LED lights up (voltage supply OK.):

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Connect test box V.A.G 1598/31 to control module wiring harness. The engine control module remains disconnected.

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Check wiring between test box and 3 pin connector for open circuit using wiring diagram. Contact 1 + socket 80 Contact 2 + socket 25 Wire

Leak Detection Pump, Evaporative System|Testing and Inspection|Page 3069 > < Leak Detection Pump, Evaporative System|Testing and Inspection|Page 3067