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    4. : Diagnosis and fault repair with the aid of the tester

Audi A4 - Video tutorial

Model: Audi A4 B6 - Years 2000-2004
Part: Engine
Operation: Diagnosis and fault repair with the aid of the tester

Technology has made great strides: in fact we can understand the origin of a fault with the help of modern diagnostic testers (supplied by parent companies, generally to companies). They must be connected to the control unit by means of a special connection and by connecting to it, we read the stored faults. Without going into too many and unnecessary explanations, this video will show you how the tester works with subsequent repair of the fault. First of all, when starting the machine, personally check for the presence of abnormal sounds or the irregular operation of the engine (when you notice that the engine warning light comes on). Once this is done, if you want confirmation or if you want to cancel that warning light and understand why it comes on, take the tester and connect it to the diagnostic socket (generally it is under the driver's seat, near the fuse box but its location changes from model to model) . Once the problem has been identified, if deleting it from the control unit it persists and reappears at a subsequent diagnosis, intervene: in this case, we will hear that it is a problem with the injection pump, which is located under a plastic tube. Remove them and detach the pump, replace it taking care not to break the tubes by forcing them to insert. Try it all and re-diagnose, it should have been corrected. Remember that it is better to make a first diagnosis, delete the error and then redo it later, sometimes the error in the control unit has remained there for some time.


Posted on 23 July 2023 by ScegliAuto

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Where we find the fuses of the Mercedes Vito W639 with diagram

MERCEDES VITO W639 FUSE DIAGRAM Looking at the fuse diagram located under the driver's seat we find in position F6 the fuse for SAM-SRB in positions from 1 to 9 we find: in the first position the fuse for the left door control unit. In second position the fuse for the right door control unit. In third position the fuse for the PSM control unit. In fourth position the fuse for the PSM control unit. In the fifth position the fuse for the 12 socket located on the base of the passenger seat. In sixth position we find the fuse for the WVC charging line for the vehicle battery. In seventh position we find the fuse for the timer and for the lighting. In eighth position we find the fuse for the auxiliary heating and lastly we find the fuse for the folding roof. The main fuse box is located in the engine compartment on the passenger side and following the diagram we find: 1 Wiper FUSE 2 HORN FUSE 3 fuse Brake light switch 4 fuse for heating 5 fuse Diagnostic socket, rotary light switch, instrument panel 6 fuse Components motor 7 fuse Rear wiper 8 Terminal 87 (1) 9 Terminal 87 (2) 10 Terminal 87 (3) 11 Motor terminal 30 Z 12 Heated rear window 13 Ignition lock / instrument panel 14 Braking system 15 Headlight range control 16 Starter motor 17 Petrol pump 18 Cigarette lighter / glove box lighting 19 Radio 20 M112 ignition coils 20 HFM diesel 21 Automatic gearbox 22 Tachograph 23 Airbag control unit 24 Japanese rear-view mirror 25 Trailer control unit 26 Cut-off relay 27 Terminal 15 manufacturer of bodywork / equipment 28 Transmission unit 29 Part assistance system nza 30 Not assigned - 31 Horn ATA 32 Socket for mobile phone / VICS 5 33 Airbag, automatic child seat recognition 34 Terminal 15 R body / equipment manufacturer 35 Airplane control panel 36 Lumbar adjustment (seat) 37 Mirror light for Trick 38 Rear compartment entertainment 39 Not assigned - 40 Engine fuse (diesel) 10 40 Engine fuse (petrol) 41 Engine fuse (diesel) 10 41 Engine fuse (petrol) F1 Terminal 30 electrical system, alternator F4 Fuse for air conditioning fan (cooling unit) F5 FUSE for the secondary air pump Fuse block F35 IN THE FOLLOWING POSITIONS WE CAN FIND THE VARIOUS FUSES OF THE F35 BLOCK 21 12 Volt socket for passenger compartment, left 22 12 Volt socket for passenger compartment, right 23 Trailer power socket 24 Trailer recognition unit 25 Driver seat adjustment 26 Passenger seat adjustment 27 Electric sliding door, left ra 28 Electric sliding door, right 29 Rear fan 30 Air suspension system 31 Parktronic 32 Tire pressure monitor 33 Sound system 25 34 Mobile phone control unit / VICS, TV booster 35 Auxiliary heating control unit 36 Not assigned 37 System rear air conditioning system 38 COMAND camera control 39 Conventional taximeter 40 12 volt socket, rear right 41 Roof warning light control unit 42 Not assigned.

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by ScegliAuto

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