Volkswagen Workshop Service and Repair Manuals

Special tools, testers and auxiliary items

• ◆ Test box V.A.G 1598/18
• ◆ Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
• ◆ Adapter set V.A.G 1594
• ◆ Current flow diagram

Check conditions

• ● Fuse 18 OK.
• ● Fuel pump relay OK

Checking voltage supply

• ‒ → Separate 4 pin connector -1- to Lambda probe.
• ‒ Connect multimeter to measure voltage at contacts 1+2 of connector.
• ‒ Start engine.
       Specification: Min. 11 V
• ‒ Switch off ignition

If no voltage is present:

• ‒ Check wiring to relay plate according to current flow diagram.