audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

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Release and disconnect electrical harness connector.

Checking internal resistance

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Connect multimeter for resistance measurement as follows.

Leak Detection Pump (LDP) -V144-

Specified value

Terminal 

1 + 3

640 ... 720 Ohm 

2 + 3

15 ... 17 Ohm

If specified values are not obtained:

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Replace Leak Detection Pump (LDP) -V144-, See item 9.

If specified values are obtained: 

Checking voltage supply 

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Connect multimeter for voltage measurement as follows:

 

Harness connector

Measure to 

Terminal 

3

Engine Ground (GND)

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Operate starter briefly. 
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Specified value: approx. battery voltage

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