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Post by gmc1103 on Aug 19, 2024 20:40:56 GMT
Hello I have an audi a3 8v from 2016, 1.6 tdi. A few months ago i have started to see messages in my cluster. Steering: System Fault You Can Continue Driving (amber) 1 beep ABS error (red) 4 beeps The error is shown in cluster but not remain, i only see the error 4 seconds When i read the car with different software i have no erros in ABS and no error in steering wheel. I have tried to have software connected to the car and then turn the ignition on....i see the error in cluster, read the car again and no dtc errors I have made a full reading and it is saved in google drive Full dumpIt is really annoying...faulty parts?? This a video of the error,stering wheel linkABS error linkCan bus problem? Undervoltage? Faulty parts?? So my question is what is going with my car? |
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Post by dv52 (Australia) on Aug 19, 2024 21:10:31 GMT
hmm......... your ODIS file does complain about multiple excursions of the battery rail voltage below 12V. Maybe hook-up a good battery charger to the car and poll the modules again - do the same messages appear on the instrument cluster with the charger connected?
Don
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Post by gmc1103 on Aug 19, 2024 22:24:05 GMT
hmm......... your ODIS file does complain about multiple excursions of the battery rail voltage below 12V. Maybe hook-up a good battery charger to the car and poll the modules again - do the same messages appear on the instrument cluster with the charger connected? Don Hello Dave How are you? This reading was with with battery charger enabled (Bosch C7). That's why i don't understand why is acting like this Faulty battery? |
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Post by dv52 (Australia) on Aug 19, 2024 23:06:46 GMT
hmm....... "Dave"? I haven't been Dave for many years!! 
If the battery charger was connected for the SCAN report - then clearly there's something very odd with the voltage that ODIS is reading. I'm not sure where the ODIS measurement is taken, but I suggest that you grab a multi-meter and start chasing voltage drops in this car (with the charger connected)
Start by checking volts directly across the battery terminals, then from the car's earth to the car's downstream voltage rail (at a fuse-block) and finally at the OBD port under the dash (see pin-out below)
Don
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Post by gmc1103 on Aug 20, 2024 21:52:20 GMT
Hi DV52 How are you? I have made all what you said and there is some stuff i don't get. First of all battery voltage is 12.45 with charger By year and my model car From Elsa Fuse holder C -SC-
F15 - Fuse 15 on fuse holder C -SC15- 10 A - Electronic steering column lock control unit -J764- 30 F41 - Fuse 41 on fuse holder C -SC41- 10 A - Steering column electronics control unit -J527- 30 I don't have any of this in my fuse box 15 and 41 are empty Fuses in fuse holder A -SA-
Fuse 3 on fuse holder A -SA3- 80 A - Power steering control unit -J500- 30 (Normal, 12,42) Fuse holder B -SB-
 8 - Terminal 30 voltage supply relay -J317- (removed the relay and changed to another one (same)) I don't understand what is going on, i set the igniotion on 10 times and only one time the steering error show up, but again, no DTC error Any ideas to do more test? |
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Post by dv52 (Australia) on Aug 20, 2024 22:33:46 GMT
gmc1103 : Hmm............ not really!!
No offense intended - but you need to read the wiring diagrams more closely! When reading the Elsa wiring diagrams it's important (essential) that you take note of the numbered footnotes beside the item According to my information (I'm not sure if my wiring diagrams apply to this car), your statements about the SC fuse positions are dependent on the build date of the car!
For example, your fuse position for SC41 is ONLY valid as the power supply for J527 if the car was built up to April/May 2013 (see footnote 2). The alternative fuse position for J527 is SC21 for cars built after from November 2013 (see footnote 7). Don
PS: the measured voltage across the battery terminal is OK - but @ 12.45V, this means that the charger is NOT supplying electrical current to the battery. This might be because the charger doesn't think that the battery needs charging (i.e. the charger has switched itself OFF, or it's trickle charging the battery)
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Post by gmc1103 on Aug 21, 2024 21:32:33 GMT
Hello DV52 Again thank you for helping me. Well i have checked what you told me and sorry but i have nothing in SC41 and SC15 (check my fuses box) In Elsa i have put my VIN and it says the same but my fuses box show me the opposite and i don't see any footnote in Elsa, at least in mine.  And the fuse box says this F41 - Fuse 41 on fuse holder C -SC41- 10 A - Steering column electronics control unit -J527- 30 So my car must be special since my fuse box don't match this My fuse box  I have checked the voltage of all fuses and they are ok. Check the can bus with multimeter ohm and there is a value of 66.4 in the range of 55/70 Checked short to ground from OBD 4 and 6 and no problem Can it be cluster?? |
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Post by dv52 (Australia) on Aug 21, 2024 23:51:02 GMT
gmc1103 : hmm......without intending to make this reply a master-class on reading Audi wiring diagrams - this is how the fuse position on J527 for this car is connected:
First, the basics - refer to my picture below: I'm sure that you already know how to follow wiring links across multiple pages in the Audi wiring diagrams - but for surety, the number in the box at the end of a wire refers to the "reference" number at the very bottom of another page showing the extension of the wire.
So, for example: the right-side rt/bl wire in the upper part of my picture below extends the wire at page reference 32 to another page via wire-box reference 368. As you can see on the lower part of my picture, page-reference 368, links the wire back to the first page via wire-box reference 32!!
OK - your Elsa extract says:
So, apparently this is a 2016 model car.
As shown in my wiring diagram extract - there were 2 x wiring-loom options for the fuse to J527: - footnote * (which links the left-side rt/bl wire reference 31 to reference 370) = the power-supply for J527 was SC41 if the car was built "up to April 2013"
- footnote *2 (which links the right-side rt/bl wire reference 32 to reference 368) = the power-supply for J527 was SC9 if the car was built "after May 2013"
If I'm correctly viewing your picture of the SC fuse-box on this car - I think that I can see a 5 Amp fuse on position SC9 which is consistent with the wiring diagram because this car was built after May 2013!!
Don
So, as I said, it's important to read the footnotes when interpreting the wiring loom terminations
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Post by gmc1103 on Aug 24, 2024 10:29:56 GMT
Hello~DV52 How are you? Back with more testing So i tested like you said and these are the results When i put the multimeter in SC9 i see the voltage is 12.45, when i turn the ignition on it drops to 11.43 then rise up to 12. I did this test several time until i got the steering wheel error ( check videos) Without charger1º video no error and the volatge has dropped 1 volt (11.43) Video 12º video error and the voltage has dropped to 11.53 (hear the beep in video) Video 2So after this i don't think it is voltage otherwise the error would show everytime and by the videos is not. I have started the engine and check if battery was charging and yes, it was at 14.09 volts. Faulty VC? Regards |
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Post by dv52 (Australia) on Aug 24, 2024 22:36:42 GMT
hmm....... I'm really not able to comment on your readings because they are marginal - meaning that they are not conclusive The problem with making judgements about these tests on a forum is that there are too many unknowns when the voltage readings do not give a clear indication of a fault (as in this case). For example a good car battery should have a nominal voltage of 12.6V (12.8V for AGM) at the terminals. However this varies with lots of things like battery age, temperature, battery technology. The other BIG unknown is the multi-meter. Your "Ferrex" multi-meter is unknown to me. I suspect that the multi-meter is sold at Aldi supermarkets - but clearly it's not a professional meter and I have no idea how good the test leads are on this device (did you perform a lead-test before starting?). And the most important unknown in your readings is what other load was activated on this car when the ignition was switched-ON. The low readings in your tests are very, very dependent on the total electrical current draw from the battery when the ignition is switched-ON - so stuff like DRLs turning-ON with the ignition can drastically affect the volt measurements! As I said, these readings are marginal, so not conclusive!!. The best place to test voltages is at the module connector and volt-drop tests are very different from measuring volts to car-earth (look at YouTube videos on "volt-drop"). And as for your question "Faulty VC?" - what is "VC"? If "VC" means the steering module - I doubt that it's faulty because there are no error messages saying so.
Don
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Post by gmc1103 on Aug 27, 2024 12:55:41 GMT
Hello DV52 Sorry for the late reply but i had to find someone with a better multimeter Check if this one is ok please  By VC i mean Virtual Cockpit error Thanks |
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