Audi Workshop Service and Repair Manuals

Checking fuel pump delivery rate Special tools and workshop equipment required

t  Adapter set -V.A.G 1318/17A-

t  Remote control for V.A.G 1348 -V.A.G 1348/3A-

t  Adapter cable -V.A.G 1348/3-2- t  Fuel-resistant measuring container

Procedure Observe test conditions → Chapter. –  Open lid of fuse box at left side of instrument panel. –  Pull fuse No. 28 off fuse holder (left row, 5th large fuse from the top). –  Connect remote control -V.A.G 1348/3A- with adapter cable -V.A.G 1348/3-2- to right-hand terminal of fuse socket no. 28 -arrow-. –  Connect crocodile clamp to vehicle battery (+). –  Remove filler cap from fuel filler neck.   WARNING Risk of injury - fuel system operates under high pressure. To reduce the pressure in the fuel system, wrap a clean cloth around the connection and carefully loosen the connection.

–  Press release tab and pull fuel return pipe -1- off pipe connection -2-. –  Fit adapter from adapter set -V.A.G 1318/17A- onto fuel return pipe coming from engine and hold adapter into measuring container. –  Press remote control button for 15 seconds.

–  Compare amount of fuel delivered with minimum delivery shown in diagram (cm3/15 sec.).   Note Voltage at fuel pump with engine stationary and fuel pump running is approx. 2 volts less than battery voltage. If minimum delivery rate is not reached, check for the following causes: t  Fuel lines have been crushed. t  Fuel filter is blocked. t  Fuel pump is defective. Assemble in reverse order.