volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

With Generic Scan Tool|Page 3580 > < With Manufacturer's Scan Tool|Page 3575
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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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Rear right wheelhousing liner, removing:

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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

With Generic Scan Tool|Page 3580 > < With Manufacturer's Scan Tool|Page 3575