volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Fuel Injection and Ignition - Fuel Supply|Page 2883 > < Fuel Injection and Ignition - Fuel Supply
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Leak Detection Pump: Testing and Inspection
Generic Scan Tool

Leak Detection Pump, Checking

Special tools, testers and auxiliary items required

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multimeter.

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Wiring diagram.

Test requirements

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The Leak Detection Pump (LDP) V144 fuse 15 in fuse panel B is OK.

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The ignition switched off.

Test procedure

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Perform a preliminary check to verify the customers complaint.  See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check

Start diagnosis

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Remove the right rear wheel housing liner.

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Disconnect the Leak Detection Pump (LDP) V144 electrical harness connector - 2 -.

Checking internal resistance

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Using a multimeter, check the Leak Detection Pump (LDP) V144 for resistance as follows:

Leak Detection Pump (LDP)

Specified values

V144 electrical connector
terminals
1 to 3

640 to 720 Ohms

2 to 3

15 to 17 Ohms

If the specified values were Not obtained:

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Replace the Leak Detection Pump (LDP) -V144-.

If the specified values were obtained:

Checking voltage supply

Fuel Injection and Ignition - Fuel Supply|Page 2883 > < Fuel Injection and Ignition - Fuel Supply