A3 Quattro V6-3.2L (BUB) (2008)
Leak Detection Pump: Description and Operation
EVAP System
For all EVAP system component locations and hose routing.
For the EVAP system hose routing.
For all EVAP system removal/installation procedures and torque specifications.
Check the Technical Bulletins for information that may supersede any information included in this service information.
‹› All manufacturers special tools as well as common tools may contain a manufacturer specific part number. These tools may be substituted with an
equivalent aftermarket tool or are available for purchase through Audi.
‹› Manufacturers special tools as well as common tools that contain a manufacturer specific part number may be referenced in the test procedure
illustrations showing the tool use or installation. If the manufacturer specific tool is not being used, an equivalent aftermarket tool may be installed
in the same manner as the manufacturers special tool.
Leak Detection Pump, Checking
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› The Leak Detection Pump (LDP) (V144) fuse OK.
‹› The ignition switched off.
‹› The voltage for the Leak Detection Pump (LDP) (-V144- ) is supplied via the Motronic Engine Control Module (ECM) Power Supply Relay
(J271).
Test procedure
-
Perform a preliminary check to verify the customers complaint. Refer to => [ General Diagnosis ] See: Computers and Control Systems/Testing
and Inspection/Scan Tool Testing and Procedures/Diagnostic Modes 01 - 09.
Start diagnosis
-
Remove the left rear wheel housing liner.
-
Disconnect the Leak Detection Pump (LDP) (V144 ) electrical harness connector - 3 -.