Audi Workshop Service and Repair Manuals

Check valve for commencement of injection electrically

• ‒ Detach connector the valve for commencement of injection => overview of fitting locations, Page 23-4.

Resistance measurement on vehicles with 3-pin connector.

• ‒ → Connect hand-held multimeter for resistance measurement between contacts 2 and 3.

• Specified value: 12 ... 20 ω

Resistance measurement on vehicles with 10-pin connector.

• ‒ → Connect hand-held multimeter for resistance measurement between contacts 9 and 10.

• Specified value: 12 ... 20 ω

If specified value is not attained:

• ‒ Replace valve for commencement of injection (N108).

If specified value is attained:

Check power supply for valve for commencement of injection

Resistance measurement on vehicles with 3-pin connector.

• ‒ → Connect hand-held multimeter for voltage measurement between engine earth and contact 3 on the connector.
• ‒ Switch the ignition on.

• Specified value: approx. battery voltage

Voltage measurement on vehicles with 10-pin connector.

• ‒ → Connect hand-held multimeter for voltage measurement between engine earth and contact 10 on the connector.
• ‒ Switch the ignition on.

• Specified value: approx. battery voltage

If specified value is not attained:

• ‒ Connect test box V.A.G 1598/22 to wiring harness for engine control unit =>Page 23-46

The following wiring connections are to be checked for open circuits and/or short to positive or negative.

→ Wiring measurement on vehicles with 3-pin connector.

→ Wiring measurement on vehicles with 10-pin connector.

• ‒ Rectify any open/short circuit as necessary.

=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder