Leak Detection Pump (LDP), checking: Notes

Recommended special tools and equipment 

• V.A.G 1526 multimeter or V.A.G 1715 multimeter
• V.A.G 1594 connector test kit
• Wiring diagram

Test requirements 

Fig 1: Identifying Main Fuse Panel

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• The respective fuses of Leak Detection Pump (LDP) -V144- must be OK:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

• Ground (GND) connections between engine and chassis must be OK.
• Ignition switched off.