Why do you think you need a BCM? Why wouldn't it be under warranty?

 

Seems to be a lot of threads where some purchase a lower model and want to add features. This gets to be very complicated. Most BCM's have to be reflashed, but thats only part of it, if you want just a heated steering wheel, will have to purchased that, and the switch to control it. Good question if you have the wiring.

Robots are making wiring harnesses now, can be programmed to add or take away this or that with a push of a button. Cheaper to make them all alike when made by hand.

Then you may void your warranty, your VIN tells exactly what options you have. Some manufacturers can only get dealer installed options, toss all the stuff you already paid for slightly different stuff. Do this so dealers can make more money.

 

Seems to be a lot of threads where some purchase a lower model and want to add features. This gets to be very complicated. Most BCM's have to be reflashed, but thats only part of it, if you want just a heated steering wheel, will have to purchased that, and the switch to control it. Good question if you have the wiring.

I have 18 Elantra Sport, so many options are already present: heated steering wheel, rear park assist sensors, heated front seats. Canadian model never came with TPMS option and I would like to have this option added to the car. My dealer was not interested in retrofit. For this to work, BCM replacement is required to gain the wheel sensors antenna.

I have already installed front park assist (PAS) sensors, using all Hyundai parts. Console switches are replaced and wires run to the fuse box, console switches and BCM. The wires are not installed just yet as I am waiting for the KET pins to arrive. This retrofit is popular in Korea and parts of Europe and from what I read BCM replacement is not necessary (but you never know). Front and rear sensors run on the same CAN bus line, so I just might be lucky. Super vision display does support front distance sensor graphics.

I do have schematics and it is not terribly difficult to pin the blank connector blocks, with correct pins.

I found this BCM from European model - fair number of supported features

This is for US spec Alabama made Elantras

I can't seem to find anything on HyundaiPartsDeal that will support PARK'G Assist System or RR PARK'G Assist System (RPAS - rear park assist). Hence my request to GDS access as this should have the list of BCM's.

 

I agree that GDS is required to pair the wheel sensors (for TPMS) and it is also used to activate features (such as seat memory).

 

I agree that GDS is required to pair the wheel sensors

So are you agreeing with yourself?

 

Good luck...........You will need plenty.

 

I need solid information. Luck has nothing to do with it.

 

I've got a GDS clone though don't hardly use it. But I have gone through it and it has a BCM section that you can toggle and test each function that is already programmed. I have heard that a new BCM needs to be mated to the car too.

 

Hence my request to GDS access as this should have the list of BCM's.

I don't think GDS will have the info your looking for. That's not what GDS is for. It's not a parts catalogue, it's a diagnostic information resource. It doesn't tell you what features a particular BCM supports. I think you need Hyundai's Mircocat for that.

 

Thank you AUTOSPARK. This is excellent information. I am also leaning towards trying one of the GDS clones off AliExpress.
I have also looked at some of posts you made and you seem to be quite knowledgeable.

 

I am also leaning towards trying one of the GDS clones off AliExpress.

Although GDS is probably the best tool for the kind of retrofits your planning, cheap Chinese clones tend to be supplied with old out of date software. That's not an issue if you own a 2008 Elantra, but might cause a big problem when you try to code a module on a 2018 model. Just something to be aware of before purchase.

 

I think GDS is now defunct from end of 2016. I have a clone, suits me fine as I look for older broken crap to fix and play with and loaded up to 2016 Euro market and also the US one stops at 2016 but useless for my region

 

AUTOSPARK and Gerard 2 - thank you for bringing up these excellent points. It seems GDS V19 supports (CAD/US market) models up to 17 (which is fine, considering Elantra Sport was available as 17 model). With the information that the GDS is becoming 'absolete', what tools/software is Hyundai using for the newer models?
Thank you.

 

With the information that the GDS is becoming 'absolete', what tools/software is Hyundai using for the newer models?

AFAIK, they use GDS.
As I understand it it's not GDS that's becoming obsolete. It's Micro$oft Windows. GDS is now an Android app.

 

Quick BCM question - the input signals going into BCM from, for example, from fog lamp switch - what type of signal is it? Are we talking about low voltage DC? (5V? 12V?)

 

Does anyone have access to part numbers of KDM Avante AD? I can provide KDM VIN via PM - looking for BCM p/n. Thank you in advance.

 

A ground as far as I know.

 

So ground switching circuit with external relay (bypassing BCM altogether) could run rear fog light? I am getting my car ready for transport to EU and one of the items I need to add is the rear fog. I prefer to use factory turn indicator switch with built-in fog lamp switch to accomplish this. Little more expensive but elegant. Ideas?

 

On both my Hyundais all the lights from the stalk are ran by grounding. There should be one hot wire on one of the connectors.

You will see one black wire looped back on the connector. The single wire end is the ground for the regular fog light switch. You can cut the loop, and then just ground the wire for the fogs under the dash. They then will work anytime the key is on and you use the fog switch. No longer dedicated to the low beams.

 

Elantra Sport does not have front fogs and I will be replacing multi-function switch with one that has front fogs switch - will use this to power rear fog lamp. Looking at the diagram it is pin 10 of M01L connector. Thank you!

 

For TPMS, I installed this aftermarket Solar TPMS from Amazon for only CAD$30. It's simple, easy plug and play. No need to care any power wire as the external receiver display box got internal rechargeable battery. Charged by solar energy. No need to remove tire rubber to install the sensor. Just replaced the valve cover with the sensor.

Using it for two months already and really save me one flat tire last time. It alert me there was a dropping pressure tire so I could change it to spare tire ASAP.

 

Thank you for your suggestion Petabyte I prefer to use OEM solution as instrument cluster is capable of displaying TPMS info with correct BCM.

 

Pretty sure the stalk switches are not momentary. But you can use a 5 pin relay with a NC set of contacts to make that work if it is.

 

But you can use a 5 pin relay with a NC set of contacts to make that work if it is.

Well, that would be much simpler than using an Arduino. Can you explain how to do it?

 

Trying to remember......

 

Sorry you can make a latching relay with one 11 pin relay or two 4 or 5 pin relays. Here is the two relay setup.

 

Sorry you can make a latching relay with one 11 pin relay or two 4 or 5 pin relays. Here is the two relay setup.

OK, that allows the pulse to switch the fog lamps on. Now you need to explain how the same pulse can switch them back off?

 

Break the ground

 

How would the pulse from the switch break the ground?

 

I would use another switch.. But I'm sure the fog switch on the stalk is a maintained contact.

 

I would use another switch.

That's cheating.
Oh well, back to the Arduino then. Nice try though.

 

So the OP has a momentary switch for the fogs?

 

I've no idea. But if he has he'll need more than a 5 pin relay with a NC set of contacts to make that work.

 

Could add a timer relay for ta kill relay with a delay on the signal. I'd have to test as I believe I've done this with two 5 pins and a momentary.

I found a free ladder logic program an I'll futz with that to see if I can get it to work.

 

I think he'd be as well to just go the Arduino route to be honest. It's much more versatile than a dumb timer and has lot's of additional inputs/outputs for possible future projects.

Then again, he might have a latching switch and not need anything other than a standard relay.

 

Thank you both Red Raspberry and AUTOSPARK for voicing your opinions. Great minds do think alike ;-) I did place an order for the multifunction switch (and some other goodies) and will provide fog lamp signal information once the parts arrive and I have a chance to check the operation.

 

The multi function switch for Elantra AD is on my desk. I was able to identify ground and signal pins - to answer the question it is grounding fog lamp signal when turned on, but with 0.9K resistance to the ground. It is constant signal as opposed to momentary. Now, this is not going to work to activate ground switching relay (this signal is normally going to the BCM and most likely triggers a transistor or a mosfet). Designing proper circuit to make it work is above my pay grade - ideas? I am not sure if Arduino could see this as a proper signal input to trigger an external 12VDC relay.

 

I see no reason why it won't directly power a relay through a ground to the coil for control. That's what the BCM does , supplies the ground for the OE relays.