volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

With Generic Scan Tool|Page 3778 > < Leak Detection Pump, Evaporative System|Locations|Page 3775
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Leak Detection Pump: Testing and Inspection
With Generic Scan Tool

Check Leak Detection Pump (LDP)

Recommended special tools and equipment

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VAG1526 multimeter or VAG1715 multimeter

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VAG1594 connector test kit

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Wiring diagram

Test requirements

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The respective fuses of Leak detection pump (LDP) -V144- must be OK.

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Ignition switched off.

Test sequence

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Remove rear right wheelhouse liner.

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Disconnect 3-pin connector of Leak detection pump (LDP) -V144- (arrow). 

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Measure resistance between terminals 1 + 3 of diagnostic pump. Specified value: 640 ... 720 Ohms

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Measure resistance between terminals 2 + 3 of diagnostic pump. Specified value: 12,5 ... 19,5 Ohms

If specified values are not obtained:

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Replace Leak Detection Pump (LDP) -V144-, item 8

With Generic Scan Tool|Page 3778 > < Leak Detection Pump, Evaporative System|Locations|Page 3775