Service of Audi A4 from 2001 to 2005 release.
1. Operation and maintenance of the car
2. Engine
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
7.1. General information
7.2. Power supply system
7.3. Generator
7.4. Starter
7.5. Relay blocks, sockets and safety locks
7.5.1. Removal and installation of the control unit of a combination of devices
7.5.2. Multicontact sockets in the control unit of a combination of devices
7.5.3. Removal and installation of the block of safety locks
7.5.4. Removal and installation of the control unit of onboard network
7.5.5. Removal and installation of the 9-nested block of the relay
7.5.6. Removal and installation of the 3-nested block of the relay
7.5.7. Removal and installation of the 4-nested block of the relay
7.5.8. Removal and installation of the left shtekerny block
7.5.9. Removal and installation of the central control unit of the Komfort system
7.5.10. Removal and installation of the right shtekerny block
7.5.11. Removal and installation of a box of the main safety lock in a luggage carrier behind at the left – the Audi RS4
7.5.12. Removal and installation of the block of the main safety lock – cars with the accumulator in a motor compartment
7.5.13. The general instructions on repair electricians of the car
7.5.14. Repair of wires of the tire of CAN
7.5.15. Break of a wire with repair in two places
7.5.16. Repair of contacts in cases of sockets
7.5.17. Mechanical blocking of the case of the socket
7.5.18. Round contacts
7.5.19. Flat contacts with asymmetrical lock uvulas
8. Body
9. Schemes of electric equipment
 







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7.5.7. Removal and installation of the 4-nested block of the relay

Removal
Disconnect a weight wire from joint stock bank at the switched-off ignition.
Remove a ware compartment from the driver.

Fig. 7.78. Removal of a cover of the forward panel


Unscrew screws of 1 block of safety locks of 2 (fig. 7.78).
Remove the block of safety locks from the central pipe of the forward panel.
Remove an electrical wiring plait from the central pipe of the forward panel and to release it from fastenings.

Fig. 7.97. Fastening of the 4-nested block of the relay


Turn off nuts (arrow) and remove the control unit of onboard network. 1 with the attached cables (fig. 7.97).
Remove the relay or control units from the 4-nested block of the relay.

Fig. 7.98. Threaded connections of the 4-nested block of the relay


To mark cables on threaded connections of 2, 3 and 5 (fig. 7.98).
Disconnect cables from threaded connections.
Unscrew the screw 1 and a nut 4.
Disconnect blocks of safety locks from the 4-nested block of the relay.

Fig. 7.99. 4-nested block of the relay


Take the relay, control units, and then unblock the corresponding payment of the relay (fig. 7.99).

Installation
Establish in the return sequence.
Attach cables to carving to connections 2, 3 and 5 according to tags (fig. 7.98).
Connect the accumulator.
Establish a ware compartment from the driver.

Inhaling moments
The 4-nested block of the relay to a body:
– Nut: 2,4 N · m;
– Screw: 1,7 N · m.
The threaded connection for electric cables: 9 N · m.


7.5.6. Removal and installation of the 3-nested block of the relay

7.5.8. Removal and installation of the left shtekerny block