audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Leak Detection Pump, Evaporative System|Testing and Inspection|Page 3489 > < EVAP Canister and Leak Detection System Assembly Overview|Page 3485
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Leak Detection Pump: Testing and Inspection

Leak Detection Pump, Checking

Special tools, testers and auxiliary items required

‹› Multimeter.

‹› Wiring diagram.

Test requirements

‹› The Fuse (S130) fuse OK. 

‹› The ignition switched off.

‹› The voltage for the Leak Detection Pump (LDP) (-V144-) is supplied by the Secondary Air Injection (AIR) Pump Relay (J299).

Test Procedure

-

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

-

Remove left rear wheel housing liner. Refer to appropriate repair information.

-

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

Checking internal resistance

-

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

Leak Detection Pump, Evaporative System|Testing and Inspection|Page 3489 > < EVAP Canister and Leak Detection System Assembly Overview|Page 3485