Note: Before doing much work, read the warning contained in paragraph 1.
Coolant temperature sensor
Withdrawal
1. The temperature sensor is installed at the rear of the cylinder head.
2. As described in chapter 1B, drain about a quarter of the coolant from the engine.
3. Disconnect the wiring and unscrew the sensor.
Installation
4. Installation - reverse procedure. Add coolant as described chapter 1B.
Engine speed sensor
Withdrawal
5. The sensor is installed on the left wall of the cylinder block, closer to the bell.
6. Trace the sensor wiring to the connector and disconnect it.
7. Turn away the fastening screw and remove the sensor from the block.
Installation
8. Installation - reverse procedure.
Fuel shutoff valve
Withdrawal
9. The valve is installed on top of the distribution head of the injection pump. Clean the area around the valve first to prevent dirt from entering the system.
10. Turn away a nut and disconnect conducting.
11. Turn out the gauge and remove a sealing ring, a spring and a plunger.
Installation
12. Installation - reverse procedure. Install clean components and tighten the sensor to the specified torque.
Injection start valve
Withdrawal
13. The valve is installed under the distributor head on the high pressure pump. First, clean the area around the valve so that dirt does not enter the system.
14. Turn away the screw and remove the valve from the pump. Be prepared to spill fuel.
15. Remove o-ring, filter, inner o-ring.
16. Disconnect the wiring connector.
Installation
17. Installation - reverse procedure. Install clean components and tighten the screw securely.
Boost pressure control valve
Withdrawal
18. The valve is fixed behind the right headlight. Disconnect the plastic duct from the intake duct leading to the air filter.
19. Disconnect wiring.
20. Remove the vacuum hoses, remembering the order of their installation, so as not to frighten during assembly.
21. Turn away nuts of fastening and remove the valve.
Installation
22. Installation - reverse procedure.
Intake air pressure/temperature sensor
Withdrawal
23. The sensor is installed in the intake duct. leading from the intercooler to the intake manifold at the left rear of the engine compartment (pic. 8.23). Disconnect the wiring.
24. Turn away screws and remove the gauge from an air duct.
Installation
25. Installation - reverse procedure.
Air flow sensor (DMRV)
Withdrawal
26. The sensor is installed in the top cover of the air filter (pic. 8.26).
27. Disconnect the plastic air duct from the air filter.
28. Loosen the clamp and disconnect the air inlet hose from the sensor.
29. Unhook the latches and remove the cover from the air filter housing along with the sensor. Disconnect the wiring from the sensor and remove the assembly.
30. The sensor with the screen can be removed from the cover, as well as the intermediate air duct. Handle the sensor carefully - it is fragile. Remove the sealing ring.
Installation
31. Installation - reverse procedure.
Electronic control unit (BEU)
Warning: Wait at least 30 seconds after turning off the ignition before disconnecting the connector. When the connector is disconnected, all data set will be erased. but codes of possible malfunctions are stored in memory. After connecting the connector, it is necessary to program the basic settings. which require specialized Audi/VAG equipment. When replacing the ECU, it is also necessary to enter the identification code of the new unit into the immobilizer memory. Contact your dealer for help.
Withdrawal
32. BEU is installed on the motor shield at the rear of the engine compartment. On right-hand drive models it is on the right, on left-hand drive models it is on the left.
33. Disconnect the wire "masses" battery as described in chapter 5A.
34. Turn away screws and remove a cover.
Note: On early left hand drive models there is a hole in the cover panel in front of the windshield to access the mounting bolt, on later models there is no hole - the panel must be removed.
35. Release the spring clip with a screwdriver and lift the BEU up.
Note: Some models will require you to remove the auxiliary relay box and auxiliary fuse box.
36. Release the clamp and disconnect the wiring connector from the block.
Warning: After turning off the ignition, wait at least 30 seconds before disconnecting the connector.
37. Remove the block from the motor shield. If necessary, the mounting housing can be removed by unscrewing the mounting nuts and releasing the tongue from the pilot hole.
Installation
38. Installation - reverse procedure. Press the latch until it clicks and gradually tighten the fastening screws. Connect the battery as described in chapter 5A.
Glow plug fuse box and system relay
Withdrawal
39. System relays are installed under the BEU cover. Disconnect the wire "masses" battery as described in chapter 5A.
40. Loosen the screws and remove the cover.
41. To remove the relay, pull it straight out of the fuse box. To remove the fuse box, disconnect the wiring and remove the mounting bolts.
Installation
42. Installation - reverse procedure.
Brake pedal and clutch switches
43. The sensors send signals to the BEU, which are used to set the dynamic injection advance angle. in chapters 6 and 9 information on their removal and installation is given.
Fuel temperature sensor
Withdrawal
44. The sensor is installed at the top of the injection pump, under the cover.
45. Turn away screws and remove a cover from TNVD. Remove the gasket.
46. Turn away screws and remove the gauge.
Installation
47. Installation is the reverse procedure. Tighten the cover screws securely.
Visitor comments