Audi Workshop Service and Repair Manuals

Removing and installing electrical wiring harness for unit injectors Special tools and workshop equipment required

t  Hot air blower -V.A.G 1416-

Removing –  Remove cylinder head cover → Rep. gr.15. –  Unplug electrical connector -1-. –  Move aside fuel hoses at air pipe. –  Remove bolt -2-. –  Remove air pipe -arrows-.

–  To unplug electrical multi-pin connector for unit injectors and glow plugs, pull release pin -arrow 1- and slacken knurled nut -arrow 2-.

–  Pry off connector from the unit injector using a screwdriver -arrow-. Press gently against the other side of connector with finger to prevent it from tilting.

–  Unbolt multi-pin connector from cylinder head and press it out of hole on cylinder head. –  Push the wiring harness out of the guides -arrow- and remove the retaining clips.   Note Take care that the wiring harness does not break when pulling it out. Make sure that no parts break off the wiring harness and get into the engine.

Installing –  Pull retaining clips -2- off new wiring harness. –  Insert connectors -1- into assembly guides to facilitate installation of wiring harness.

–  Heat wiring harness -1- using hot air blower -V.A.G 1416- only until you can bend the wiring harness to install it without breaking.

–  Working from the bottom right side, slide wiring harness -2- into hole on cylinder head -arrow-. l  Guide wiring harness so that electrical connectors -1- for unit injectors come to rest in the position shown in the illustration. –  Attach retaining clips and move wiring harness into installation position. –  Tighten bolts on multi-pin connector. –  Attach electrical connectors for unit injectors. Remaining installation steps are carried out in reverse sequence; note the following: –  Remove cylinder head cover → Rep. gr.15. Tightening torque

Component	Nm
Connector for wiring harness to cylinder head	10