2012 bcm blowing fuse 6 at the b fuse block

[Dr Sheldon]

Your more than welcome to step up and find it the pinned output from the bcm isnliated above works fine with a replacement bcm until the long coding is added norn is blocked by the bcm as well.. with the circuit break finder on it the bcm clicks on one or the center relays next step is to pull the 2 output wires to the suspect circuits but it makes no sense that a junkyard bcm let's everything work except start with kessy once I copy the longcode from my bcm the fuse.pops on the circuit and the car will start with kessy so it has to be coding related but come on by and show me the failure of my troubleshooting.. I'll wait

My first and foremost thought is that you are over complicating this !!

I have a tried and trusted work ethic !!

If i cannot fix it in a reasonable time - Move it on !!

Go fix something that I can fix. Time waits for no man - Neither do the bills !!

Efficiency !!

 

[Reeln77]

My first and foremost thought is that you are over complicating this !!

I have a tried and trusted work ethic !!

If i cannot fix it in a reasonable time - Move it on !!

Go fix something that I can fix. Time waits for no man - Neither do the bills !!

Efficiency !!

Yea that doesn't given me a working horn (stopped by bcm per vcds)
Working dome lights or working tail lights (I had to swap to led and tie into the license plate bulbs temporarily to have tails only running 194 lasfit leds in them to mitigate current draw) works though. And I've went step by step even spent 300 on the ect 3000 break finder pulled all interior even most of the dash also has continuity from the bcm output pins to the respective light circuits fuse sc6 on the 2012 tdi jetta feeds the bcm for those 2 options dead spot is the bcm 4 of them.. now the junkyard pulls work until the long code is changed then they pop the fuse I have to copy long code to start with kessy unless I start with a fresh code and enable kessy in the long code helper and then see if it starts and enable each bit to match my stock unit until I have an issue I have 4 bcms to work with just need a clean working code to start with. Make sense?

 

[Dr Sheldon]

Yea that doesn't given me a working horn (stopped by bcm per vcds)

We do not know that right now ?
I have an idea that may hold water !! Read below in Bold

And I've went step by step even spent 300 on the ect 3000 break finder pulled all interior even most of the dash also has continuity from the bcm output pins to the respective light circuits fuse sc6 on the 2012 tdi jetta feeds the bcm for those 2 options dead spot is the bcm 4 of them.

The ECT 3000 - I got one - it is shit !! Waste of money- My humble ....

pulled all interior even most of the dash

In the early stages, exploratory stage, we should endeavour to remain non intrusive - Pulling it apart is the sign of desperation and poor skills, tooling !!

I have 4 bcms to work with

From a diagnostic view that is suicidal. You should be working with the original, only the original til such time as you have conclusive evidence to condemn it - That is diagnostic Law - Written in stone !!

Now then

What if, in your car is a dead short to ground in a circuit !!

However that circuit is only active when a certain Coding or Adaptation is activating it !! You follow ??

So could it be that you adjusting the Coding is activating a circuit with a dead short and hence blowing the fuse !! ??

The cure is simple .. When the fuse blows - go diagnose why the fuse is blowing - Not a big ask is it ??


Fuses blow for one reason and one reason only - All you got to do is find the short and stop blaming all but your own work !!


Report back when that is done please..

but come on by and show me the failure of my troubleshooting.. I'll wait

I speak form real life experience and "some" Knowledge of the modern day car - Award winning to be accurate.

Presented with that scenario I would expect to have it nailed in 200 minutes..

 

[Dr Sheldon]

What if, in your car HAS a dead short to ground in a circuit !!

Typo in #43 corrected.

 

[Dr Sheldon]

Food for thought !!

When a fuse blows - It is doing what it was designed to do !!!

It is not being a nuisance sent from the devil to disrupt your life - Fuses Save Components and Lives !!

 

[Dr Sheldon]

added norn is blocked by the bcm as well.. with the circuit break finder on it the bcm clicks on one or

Another Shite tool -- Has Vanity but No Sanity !!

Use a 501 bulb - If it lights up it has the capacity to blow the fuse - More evidence of over complication !!

 

[Reeln77]

Another Shite tool -- Has Vanity but No Sanity !!

Use a 501 bulb - If it lights up it has the capacity to blow the fuse - More evidence of over complication !!

Yea I'm unhappy with it the affected circuit powers those 2 items as far as I know I can't get an answer on what else it powers that goes back to my plan start with good code then add kessy then enable but by but until it goes

 

[Dr Sheldon]

I can't get an answer on what else it powers

Erwin

Wiring Diagram

You need to get that answer !!

 

[Dr Sheldon]

what else it powers

Fuses do not blow for fun !!

 

[Crasher]

It was back with Polo 1 then Classic with Polo 2 then they weren’t offered in the UK anymore and revived different names elsewhere. I can’t figure out why a PQ35 car has a PQ25 BCM but it is a Mexican built NAM car and I have zero experience with them, without the VIN I can’t look it up.

 

[Reeln77]

---

It was back with Polo 1 then Classic with Polo 2 then they weren’t offered in the UK anymore and revived different names elsewhere. I can’t figure out why a PQ35 car has a PQ25 BCM but it is a Mexican built NAM car and I have zero experience with them, without the VIN I can’t look it up.

3vwll7aj9cm409455 it's in the autoscan above I'm curious as well

 

[Uwe]

I can’t figure out why a PQ35 car has a PQ25 BCM

Penny-pinching. Common in "poverty spec" NAR cars that were built in Mexic. That said, we got certain features like conventional cruise control even in the lowest trims.

-Uwe-

 

[Crasher]

NAR, yes…

It is a type 162 X9M so PQ35 and BCM revised number 5C5 937 087 G Z0F, I will ATP cross check that on ETKA tomorrow at work because a UK PQ25 in 2012 such as a Polo 6R uses a 6R0 BCM… No wonder VW AG is in such a mess, everything is too complicated.

 

[Reeln77]

NAR, yes…

It is a type 162 X9M so PQ35 and BCM revised number 5C5 937 087 G Z0F, I will ATP cross check that on ETKA tomorrow at work because a UK PQ25 in 2012 such as a Polo 6R uses a 6R0 BCM… No wonder VW AG is in such a mess, everything is too complicated.

I'm genuinely curious about that the way I have gotten the ones. I have one of my good friends owns multiple salvage yards and he just shreds them. He mainly sells drive lines and a body parts hell I've got 5 cjaa ecms in the garage that I pulled to sell i will check back and see when he gets another one with the same suffix code and copy to mine and work from there. I also need to cut one of the bcm plug it off one of the cars to disassemble it i know which pins go to. The circuits that are affected from the output i want to be able to disassemble one in my car without mandeling it and I will try that way as well. Since nothing else seemed to work i will probably do that before any code change i know I do get continuity from those output pins on the harness side between the light connectors of course, I also check to see if there is ground continuity in there is not .. fum fun

 

[TTT]

No wonder VW AG is in such a mess, everything is too complicated.

Coming from Opel environment, I could not believe my eyes what VAG is doing. The amount spent in engineering hours is insane.