VW Golf IV 1.9 TDI - Clocks and computer hung until completely stopped

I have such a problem and I do not know where to look for a solution:

the clocks (tachometer, speedometer, fuel gauge, temp) along with the on-board computer display gradually stopped, sometimes while driving "hung" on certain indications, then returned and continued to operate live, sometimes worked after the car was started a few minutes and then also everything hung, etc.

It lasted several months, in different driving conditions, longer and more often, until they came to a complete stand-off, i.e. now, when it is surprising and shows the parameters, it lasts 1-2 seconds and again they hang, 99.9% of the time they hang. The same on-board computer (previously lit on certain indications, also hung - now even it is not lit - nothing displays)

Interestingly, when the indications suddenly fell so the parameters hang as long as at the time of the last indications - e.g. stand still and there is 70 km / h on the speedometer.

The only thing that works is the lights, fuel reserves, etc. - besides, the entire dashboard hangs. Similarly, the clock backlight, etc. - always works steadily, the power comes on.


WHAT SHOULD I DO ? The contacts and wires are working and the spray to improve contacts splashed because I thought that a socket loose behind the clocks was pulled out.


Golf 4 1999 1.9 TDI 110 HP 5D hatchback with on-board computer

I have a similar problem with golf IV 1.9 tdi 98r. The car stopped for a while, the battery has discharged, I charged the battery. The dashboard has stopped responding (no indication, only the indicator light from long lights works). In addition, the engine will start and turn off after a second. The turn signals operate. fuses OK. Where to start, maybe some suggestions.

Check the power and weight on the cubes with a light bulb of at least 5W. If they are ok, the counters need to be replaced because there is rather no point in playing CPR.

for me, the power supply on the 2 cubes that are next to the dashboard (after removing the clocks) are OK, I checked

do you think that the easiest way to replace the meters for ~ PLN 100 used with allegro? after replacement, the key needs to be re-coded or is it not necessary?

Golf 4 immo in the meter you need to add keys

If you buy the same meter number, you will translate the memory and do without coding, etc.
The second colleague is 99% out of power on the meter.

the meter itself is rather efficient, I think something with contacts may be?

as I wrote - he sometimes works / worked - this is particularly visible on the computer's indications - which calculated cosmic results on residual data, e.g. average fuel consumption 30-32 L / 100 km (and normally it always showed 6-8 L and after using the fuel you can see that it still is)

And how do you think the meters are falling? They explode like in American films, destroying windows in the surrounding buildings? your damage is clearly in the meter, and no one with the knowledge and tools to repair will take up the subject * because workshops buy these meters from PLN 50. If every penny counts for you, buy the same clocks from an Englishman and replace the memory and dials.
* does not apply to meters with factory defects which may also appear in a new meter.

how familiar with the prices are you how used European golf meters IV 1.9 TDI with full FIS stand?

because I usually saw the simplest ones for 30-50 zlotys but without FIS, and the computer has now

with half-FIS they are also 100-150 PLN

atomal wrote:

but without FIS, and the current one has a computer

Nowhere have you written that you have a fis. Fis = / = on-board computer.
If I were you, I would have soldered through the counter plate, replaced the quark. Is there communication with the meter at the moment? Thinking that the car is starting, it should say something, unless it is immo off. If this does not help, then a second counter PLN 200 or English PLN 50-100 and playing with shields.

already in the 1st post of the topic, after all, I wrote 3 times that the counters have an on-board computer - both in the description of the problem and the car and I wrote that sometimes it stops (completely extinguishes) and when the computer returns it is based on the remains of the information and has cosmic combustion data, etc. .

Yes, it has full FIS (I saw some semi-FIS and non-FIS on the Allegro).

Communication with the meter after the VAG test (laptop + cable to OBD2) IS - the meters start and fall - after the test.

The on-board computer is different from the fis. The car may have a computer and not have a fis, then data such as burning shows on this display where you have the watch.
How did the mileage behave when the meter was freezing? Was he stopping? If so, after hanging did he count from the state in which he stopped or jumped over the distance driven with a frozen meter? It is very likely that pcb soldering will solve the problem, if you feel confident in smd soldering then do it, if not then give the meter to solder to some electronics because remember that without a meter or with a completely damaged you will not start the car. The surest option will be to replace the meter.

oh that's ok

counter and current time (these 2 small simplest small displays as on old watches) work all the time and counting the mileage and hour - similarly the clock backlight / works - when the indications are hanging just stand hands + no display in the middle of the FIS screen / computer between clocks.

do you need a special microstock soldering iron for such soldering?

No, all you need is a 30W flask and good quality flux, I can't push with a transformer. Unfortunately, the distances between pads are below mm so experience is of great importance. The soldering iron cannot be too powerful either because the pads fall off the plate. It's also difficult for me to point out the specific area on pcb. You have to decide for yourself whether to play it or buy such a counter and change the memory.

that's ok

does it look something like this, in which area could I particularly look at and improve February?
https://obrazki.elektroda.pl/6452293800_1354731986.jpg

Do you have a freezer? If so, connect the car meter and spray the tile piece by piece, it is possible to more or less determine the place. If not, try tapping next places. I certainly would not cling to the megamosa and cana track, before you even solder on the other side you should have uln responsible for analogue indicators. Find their exact symbol, check in the datasheet on which legs they have power and measure them with the meter (of course, in the car with the ignition on and when the meter does not work). Be careful not to short anything.

The car started, the clocks worked. Thank you all for your help.