Lots of dash lights after checking horn fuse

[Chruzz]

Airbag dash light was on so checked fuses before thinking it was the clock spring. After this I now have so many so many dash lights on. Lost speedometer, power steering and cruise control.

I have ordered an OBD11 to try and clear codes.

I have also tried resetting ecu by disconnecting battery cables and joining them together to drain charge from all electrical.

Still trying to determine Air Conditioner fault. I think it maybe a bad sensor that may need replacing.

Any help on how to approach ABS, Airbag and AC would be greatly appreciated



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[DV52]

hmmm......... have you taken this car for a drive since removing/re-connecting the battery leads? If not, do so and re-poll the CAN network for errors

Don

[Chruzz]

Have just returned from a drive. All previous warning lights are still on. I am waiting on OBD11 to arrive in post before I can rescan.


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[MIG]

The ABS module looks to be offline in that scan, that will also cause the no speedo and CC not to work.

Check the fuses for the ABS unit, they also may be two of them (one for the pump and one for the controler side)

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[Chruzz]

Disconnected battery checked all fuses. Took off ECM sprayed some contact cleaner in there. Reconnect battery same issue


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[MIG]

What year and engine is your Polo? I can look up the wiring diagram.

2010 - 2012 has fuses SA5 40a (Big fuse top of the battery), SC1 25a and SC4 10a (Top the left side top of the battery) for the ABS unit.

Have you got a multimeter? I can also let you know the pins to test for voltage on the ABS connector.

[Chruzz]

What year and engine is your Polo? I can look up the wiring diagram.

2010 - 2012 has fuses SA5 40a (Big fuse top of the battery), SC1 25a and SC4 10a (Top the left side top of the battery) for the ABS unit.

Have you got a multimeter? I can also let you know the pins to test for voltage on the ABS connector.

VOLKSWAGEN POLO TRENDLINE Auto(DCT) or Manual 6R 06/2009~01/2012 2 Door Hatchback FWD PETROL 1.4 litre, CGGB I4 16v DOHC VVT Direct Inj {63kW}

I have a multimeter. Would be very grateful for anything to test to try and keep trying to fix my issues. [emoji120]


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[MIG]

Check out the fuses on top of the battery A5 40a (Big fuse top of the battery), SC1 25a and SC4 10a (Top the left side top of the battery)

Was anything touched with this connector highlighted in green?

[Chruzz]

Nothing has been touched on the ABS control module. I’ve disconnected it and sprayed contact cleaner in to see if there was a bad connection.

Here is a photo of my fuse box. Not sure how to check the larger fuses but will research and see if I can work it out


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[DV52]

hmm........ without intending any offense to @MIG very reasonable suggestion and IMO of course - the problem with launching into solution mode in this case (AT THIS TIME) is that the information that is available is grossly insufficient!!.

The list of faults in your first post is inadequate - the data is only of a general nature, it doesn't even indicate when these errors occurred and it says nothing about the time relationship (if any) between the separate fault codes.

I'm not suggesting that anyone is to blame for this inadequacy - I'm just suggesting that maybe the diagnostic phase of this exercise needs to wait until you get more information.

When you get delivery of your OBD11 device - I suggest that you make sure that the "Freeze-frame" facility is enabled on the software. Then make a SCAN report and post-up a FULL (meaning unedited) copy-please

Don

[Chruzz]

Thanks Don. Will do. Apologies. Trying my best to work with the only info I have. Cheers. Will post more detailed info once I have Obd11


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[DV52]

@Chruzz: No apology needed - I understand entirely your frustration!!

Assuming that you will be new to OBD11 and from my moderator experience on the OBD11 forum regarding new-bees - I suspect that that you may have difficulties getting the information on the mobile-phone screens into a form that can be posted here. If so and assuming that you will be using iOS software version of OBD11, here are the steps for digitizing the SCAN reports.

After the OBD11 scan is completed - do this:

1. Exit OBD11 software and start a new session (note: you don't need to plug-in the dongle to the car's OBD port, or connect to the dongle)
2. Click on the Garage tab on the lower part of the Home screen
3. Select the car from the list of vehicles - if you have more than one vehicle registered under your account
4. Scroll-down the car-information screen and click on History
5. Follow the instructions below:
   
6. After you receive the file that you sent to your email in the last step above - attach the contents to a new post here

Don

[Chruzz]

Thanks Don, for helping me with the OBD11 export. I tried copy and pasting full scan but the Forum says it is too many characters. I have uploaded a TXT file to my server: http://halfnine.com.au/OBDeleven_Log_full_export.txt


Since my first post I have replaced water pump and belt, replaced battery, replaced key fob battery. I have also continuity tested all fuses. I have disconnected Brake Control Module cable and sprayed contact cleaner on the terminals.


OBD11 can't scan the Brake Control Module. OBD11 says "Error - Control Unit not responding. Check ignition and try again" This is while I have the ignition on and car running.

Should I be looking at wheel sensors or something else? Maybe I should just take it to a mechanic or auto-electrician?

[DV52]

@chruzz: Hmm........ no offense, but we have gone from the sublime to the ridiculous!! Meaning that you started this thread with very little actual diagnostic information and now we are inundated with an avalanche of diagnostic data!!

So- your "full export" file is replete with both historic errors and with current faults. And the file contains lots of information that really isn't helpful to the subject of your thread - so very confusing!!

I think that we should attempt to distill the diagnostic data to just those elements that pertain to your airbag issue - and the Brake module which appears to be missing from your SCAN reports (which is concerning).

So - in respect of the latter issue - I suggest that you first try to clear ALL errors and then make a fresh SCAN with the ignition-ON and the engine OFF. Hopefully the new scan will include the hex03 module - if so, please post-up just the details for this latest SCAN (ensure that "Full scan" is the only radio button ticked in my 2nd screenshot and cut-and-paste ONLY the latest scan)

Also, your multiple SCANs record the following for the Engine module:
01 Engine

Faults:
U012100 - Lost Communication With
Anti-Lock Brake System (ABS) Control Module
static
Priority - 2
Malfunction frequency counter - 1
Unlearning counter - 255
km-Mileage - 184810 km
Engine speed - 803.50 1/min
Normed load value - 28.2 %
Vehicle speed - 255 km/h
Coolant temperature - 31 °C
Intake air temperature - 15 °C
Ambient air pressure - 1020 mbar
Voltage terminal 30 - 13.264 V
Dynamic environmental data - 209628105F0014CB00
date - 2023-06-20 19:47:56

I've highlighted the aspects of the fault's freeze-frame data that are pertinent to the missing Brake module .

So - the date record for this fault suggests that you "disconnected Brake Control Module cable" last Tuesday @ about 7:47PM. Is this correct?

And, whilst I ask this further question with a degree of incredulity - how the F#ck did you manage to "disconnect the Brake Control Module cable" with the Vehicle speed= 255 km/h?


As for the former matter issue which is really the subject matter of this thread - I note the following from your multiple SCANs:

15 Airbag

Faults:
B13BCF2 - Multiple collision brake
No function
static
Priority - 2
Malfunction frequency counter - 1
Unlearning counter - 255
km-Mileage - 184810 km
date - 2023-05-31 10:18:03

So - the date record for this fault is about 2 x weeks before your first post and the fault descriptor suggests that somehow the Airbag module lost its Multiple collision brake function! Was the car involved in a collision (was this the reason for replacing the water pump/belt and battery)? If not what was the car doing on this date?

And also if not, is this the reason why you "disconnected the Brake control module cable" (i.e. you assume that the fault was caused by a wiring/pin issue at the Brake module connector)?

Don

[Chruzz]

I did clear the errors (twice) and was only doing what I was requested by uploading the whole log file. I am sorry to have confused the issue further. I would have distilled the log file but thought I might cut out important info.


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