Audi A4 B5 starter: where is it located, how to remove, replacement

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The fuses and relays of the Audi A4 (B5) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 are located in the passenger compartment and engine compartment of the car. Audi A4 (B5) fuses protect electrical devices and circuits from short circuits and voltage surges. Audi A4 (B5) relays are designed to ensure the proper operation of electrical appliances and vehicle equipment.

Please note that all information provided below is for informational purposes only. The exact location of the fuses for this vehicle is indicated on the protective cover or in the repair and operation book that came with the package.

Fuse box No. 1 Audi A4 (B5)

Fuse box No. 1 Audi A4 B5
Fuse box No. 1 in the diagram is located in the car interior on the left side of the instrument panel. To access the fuses, you must open the protective cover using a plastic screwdriver or other auxiliary devices.

Audi A4 B6 fuses

A large number of fuses provide protection for the vehicle's electronic systems. Each fuse is part of an electrical circuit.

The fuse trips if, for example, as a result of a short circuit (one of the consumers is faulty, the wire is damaged), the current suddenly increases significantly. The fuse link is destroyed, the current is interrupted, and overloading the circuit is prevented.

By the way, this also happens when you connect additional consumers to an electrical circuit that is loaded to the limit.

To ensure that the vehicle is not left without power in the event of an electrical fault, the fuses are distributed over different circuits. The fuel injection system and most electrical components are protected by their own fuses. The connection of the fuses can be determined from the separate circuit diagrams.

Distribution of fuses across circuits

There is a 150 A main fuse located directly on the battery. Most of the fuses for individual consumers and electrical circuits are located in the fuse box on the left of the instrument panel. Under the cover there is a diagram of the placement of fuses, the fuses themselves and plastic tweezers for replacing fuses.

Of course, there may be some changes and deviations in the distribution of fuses, as it depends on the year of manufacture of the vehicle, the engine and the composition of the equipment. On circuit diagrams, the number 2 is placed before the designation of fuses, starting with fuse S23 (i.e. fuse S39 is designated as S239).

Fuse boxes contain fuses that consist of a clear plastic piece. This part contains two flat pins, which are connected to each other by fusible wire. A blown fuse can be identified by a break in the wire. Often the plastic covering also burns out or breaks off.

• The fuse rating can be determined by the color and inscription on the fuse: Beige 5 amps Brown 7.5 amps Red 10 amps Blue 15 amps Yellow 20 amps White 25 amps
• Green 30 amp

Replacing fuses 1 Before replacing a fuse, turn off the relevant consumer and the ignition. Remove the cover from the fuse box.2 Using plastic tweezers, pull the defective fuse out of the socket.3 Insert a new fuse of the same rated current into the socket. Pay attention to the placement of the fuse.

4 If the fuse immediately blows again, the fuse may be faulty or you may have inserted a fuse with a lower amperage than required. In this case, the cause should be determined immediately. The consumer may be damaged; in the worst case, the wire insulation may catch fire.

Source: https://carpod.ru/predohraniteli-audi-a4-avant-s-2000-g-50.htm

Relay and fuse box No. 2 Audi A4 (B5)

Relay and fuse box No. 2 of the Audi A4 B5 is located inside the car in the steering column on the left side in the direction of travel. To access Relay Block No. 2, it is necessary to dismantle the trim of the steering column space.

Do-it-yourself starter diagnostics

For the convenience of carrying out work, we place the machine on an inspection hole, preferably a hydraulic lift.

From under the bottom we inspect the electrical wiring, the starter housing, the contact board, terminals, and the battery. In the Audi showroom we carry out troubleshooting of the ignition switch core. We eliminate play, tightness of key rotation, and damage to wires.

At the same time, we measure the charge level at the battery contacts and charge as needed.

If a visual inspection does not reveal a defect, but the trigger mechanism still does not start, then we proceed to dismantling and subsequent disassembly of the mechanism.

Relay block No. 3 Audi A4 (B5)

Relay and fuse box No. 3 Audi A4 (B5) is an additional unit that is present exclusively in cars with diesel engines. Relay block No. 3 is located in the engine compartment of the car depending on the location of the steering wheel. In cars of the European market, the block is located on the left side in the direction of travel of the car. To access the relay, you must unlatch the latches and open the protective cover.

Problems with starter on Audi A4 B5

Faults associated with the electrical power system are classified into electrical and mechanical. The speed of identification of a breakdown and the timing of repairs depend on the professionalism of the technician.

The electric type includes:

• Damage to the insulating layer on conductor products;
• Poor fixation of terminals on the contact board;
• Contacts sticking due to overheating;
• Oxidation of contacts on the end switches;
• Short circuit of armature, winding;
• General malfunction of the trigger mechanism due to moisture entering the housing.

• Third-party mechanical damage to the launcher, body, anchor;
• Wear, deformation of the teeth of the drive shaft, flywheel;
• PU jamming;
• Solenoid relay sticking due to overheating.

Nomenclature numbers of fuses and relays Audi A4 (B5)

Replacing and installing a starter on an Audi A4 B5

Preparation of tools: heads, ratchet, rags, lubricant, brush repair kit. And also a roller bearing and bushing. If natural light is not enough, we use an additional light source.

We decide on the method of repair: install a new trigger mechanism or restore the current one. From the point of view of economy, it is more profitable to repair the standard starting device. Buying a new one costs 6–8 thousand rubles, and repairs 2–4 thousand rubles. The owner of the technical device has the final say.

• To remove the launcher, we place the Audi on an inspection hole and block the rear row of wheels with wheel chocks. Squeeze the parking brake, remove the terminals from the battery;
• Unscrew the power terminals from the starting device;
• We remove the starting device from the slots and remove it.

We carry out troubleshooting, sort out the control unit, and install it in its original place. We inspect adjacent parts and mechanisms, and if there are signs of wear, replace them with new ones.

Expert advice on care and maintenance

Buy original parts from official sales points. Use the services of certified service stations for diagnostics and prevention.

Do not purchase cheap consumables of dubious origin. Check the catalog numbers with the data contained in the operating instructions.

Do not turn the starter for more than 15 seconds. Wait a pause and try to start the engine again.

The average service life of the starter is 80 – 95 thousand km, scheduled maintenance every 20,000 km.

In case of difficulties in servicing the equipment, additionally read the recommendations in the operating manual, get advice from service station foremen and car dealership managers.

4 cylinder engine

1. Disconnect the negative (-) battery cable.

Caution: Follow the instructions in Section Replacing the battery.

4. Disconnect the B+ terminal wire (2) from the starter.

5. Disconnect the connector of terminal 50 (1).

6. If necessary, remove the insulator on the positive terminal of the starter.

7. Disconnect the cable clamp (4).

8. Petrol engine: Disconnect the holder (3).

9. Remove bolts (1) and (2) and pull the starter forward.

1. Secure the starter with a torque of 45 Nm

(M10 screw) or 65 Nm (M12 screw) at the gearbox.

2. Secure the wire of terminal B+ with a torque of 16 Nm

at the starter.

3. Further installation is carried out in the reverse order of removal.

Fuse board on the left side of the dashboard

To access the fuses, open the door and remove the cover. It will look something like this. An example of access is in our video at the end of the article.

Scheme

Description for Audi A4 B8 vehicles up to 2009

Description for Audi A4 B8 vehicles after 2009

Audi A4 fuses

The Audi A4 is a highly sought-after sedan car model in almost all regions of the Russian Federation - high build quality, elitism of the model and thoughtful equipment provide the owner with safety and comfort in the cabin, regardless of operating conditions. However, for stable operation of the vehicle, all vehicle systems must be serviced in a timely manner, in particular, monitor the electrical components of the vehicle and replace damaged fuses.

Block in the engine compartment of audi a4 b7

General scheme

This unit is located under the ECM/TCM (battery section). Several decryption options are possible.

Description for gasoline engines

Description for diesel engines

Fuse box in the trunk of an Audi A4 B8

The block is located behind the right side trim. Descriptions of items may differ from those shown.

Scheme

Decoding for cars up to 2010 .

Decoding for cars from 2010 onwards.

Fuse number 40 at 15A is responsible for the cigarette lighter.