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Audi Workshop Service and Repair Manuals

With Generic Scan Tool|Page 3091 > < Leak Detection Pump, Evaporative System|Locations
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Leak Detection Pump: Testing and Inspection
With 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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Fuse S234 OK.

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The Fuel Pump (FP) Relay J17 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/General Diagnosis

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Remove the left rear wheel housing liner.

Start diagnosis

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Remove the right front wheel.

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Remove the right front wheel housing liner.

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Disconnect the Leak Detection Pump (LDP) V144 electrical harness connector - 3 -.

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

catalytic converter harness
connector terminals
1 + 3

640 to 720 Ohms

2 + 3

15 to 17 Ohms

If any of the specifications are not obtained:

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

If the specified values are obtained:

With Generic Scan Tool|Page 3091 > < Leak Detection Pump, Evaporative System|Locations