Audi Workshop Service and Repair Manuals

Checking fuel pump (electrical test) Special tools and workshop equipment required

t  Remote control -V.A.G 1348/3A- for V.A.G 1348 with adapter cable -V.A.G 1348/3-2-

t  Hand-held multimeter -V.A.G 1526D-

t  Auxiliary measuring set -V.A.G 1594C-

Procedure –  Observe test conditions → Chapter. –  Remove rear seat bench → Rep. gr.72. –  Unscrew cover for flange -arrows-.

–  Unplug electrical connector -1- on flange.

–  Connect remote control -V.A.G 1348/3A- for V.A.G 1348 to contact -1- using adapter cable -V.A.G 1348/3-3- and test lead from auxiliary measuring set -V.A.G 1594C-. –  Tape off 2nd connector contact of adapter cable -V.A.G 1348/3-3- with insulating tape -arrow- to prevent short circuits. –  Connect contact -5- to vehicle body (earth) using a test lead from auxiliary measuring set -V.A.G 1594C-. –  Move switch of remote control -V.A.G 1348/3A- for V.A.G 1348 to front of engine compartment.

Vehicles up to 05.2008: –  Unclip plenum chamber cover -2- and remove.   Note Disregard -items 1, 3- and -arrow-.

Vehicles from 06.2008 onwards: –  Lift off cover -1- by its handle -arrow-.

All vehicles (continued): –  Release retainer -arrow A- and open cover -arrow B-.

–  Connect crocodile clip to jump start socket -U6--item A- in terminal 30 wiring junction 2 -TV22- located in plenum chamber. –  Press remote control switch. l  Pump should start running audibly.   Note The fuel pump runs very quietly. Where possible, avoid noisy surroundings when testing the fuel pump.

–  If no noise can be heard from pump, remove fuel delivery unit → Chapter. –  Check that wiring between flange and fuel pump is connected and test for continuity. –  Renew fuel delivery unit if no wiring fault is detected. –  Install fuel delivery unit → Anchor.