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Passat Sedan V6-3.6L (BLV) (2008)

Powertrain Management > Emission Control Systems > Evaporative Emissions System > Leak Detection Pump, Evaporative System > Component Information > Locations > Page 3424

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Leak Detection Pump: Testing and Inspection

Diagnostic Procedures

Leak Detection Pump Checking

Special tools, testers and auxiliary items required

‹› Multimeter.

‹› Wiring diagram.

Test requirements

‹› Fuse (SB44) OK. 

‹› The ignition switched off.

‹› The voltage for the Leak Detection Pump (LDP) (-V144-) is supplied by the Motronic Engine Control Module (ECM) Power Supply Relay 2

(J670).

Test procedure

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Observe safety precautions. Refer to => [ Safety Precautions ] See: Computers and Control Systems/Service Precautions/Safety Precautions

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Observe Clean Working Conditions. Refer to => [ Clean Working Conditions ] See: Computers and Control Systems/Service Precautions/Clean
Working Conditions

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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.

Start diagnosis

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Remove the right rear wheel housing liner. Refer to Body Repair Information.

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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:

Powertrain Management > Emission Control Systems > Evaporative Emissions System > Leak Detection Pump, Evaporative System > Component Information > Locations > Page 3424

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