[vennarbank]

In my wife's Grand i10 automatic, check light came on. Hyundai ASS told that ECM is burnt in some places and we need to change it costing around 40K. But when i asked my local mechanic he told me that we can replace only the burnt parts and it will cost around 14K. Has anyone done these kind of repairs before.

[Jeroen]

Originally Posted by vennarbank

In my wife's Grand i10 automatic, check light came on. Hyundai ASS told that ECM is burnt in some places and we need to change it costing around 40K. But when i asked my local mechanic he told me that we can replace only the burnt parts and it will cost around 14K. Has anyone done these kind of repairs before.

You need to understand what happened here first. Why did it burn? Is it an electronic component that popped? If so, you need to figure out why. Sometimes old electronics do go up in smoke. But it is very rare for car electronics up to say 10-15 year to have such damage.

If it does it usually means there was another reason why the ECU got damaged. Something must have shortened.

If it is straighftorward components replaced that can usually be done. I’m not familiar with this car, but you might want to check if the ECU needs re-programming or so. In many cases it is just a plug and play principle.

Good luck
Jeroen

[vennarbank]

Herewith i attach the photos of the board. Some components of the board seems burnt out.

[sagarpadaki]

Originally Posted by vennarbank

Herewith i attach the photos of the board. Some components of the board seems burnt out.

A competent ECU repair person will be able to replace the damaged components and repair the ECU. You will need to put some effort to figure out who can do this repair in your city.

[Ravindra M]

Originally Posted by vennarbank

Herewith i attach the photos of the board. Some components of the board seems burnt out.

The burnt components are passive components like resistor, diode etc. It is tell-tale sign of something wrong on the vehicle side - maybe short circuit somewhere or failed electronic component/actuator causing electrical overload or spikes from alternator, battery getting disconnected even for microseconds. This need to be investigated thoroughly by competent technician. Else the new/refurbished ECU is likely to fail again in sometime.

[vennarbank]

Originally Posted by Ravindra M

The burnt components are passive components like resistor, diode etc. It is tell-tale sign of something wrong on the vehicle side - maybe short circuit somewhere or failed electronic component/actuator causing electrical overload or spikes from alternator, battery getting disconnected even for microseconds. This need to be investigated thoroughly by competent technician. Else the new/refurbished ECU is likely to fail again in sometime.

Thanks. Will let the mechanic know. The car is 12 years old to set more context

[motorguy]

Though not an ECM, I had a similar issue on my i10 (year 2010) a few years back. The airbag module light came on indicating an issue with the airbag system. Hyundai ASS indicated that the air bag module was damaged and quoted also Rs.40K for replacement at the same time saying that it could probably be repaired at Rs.14K.
Disconnected the airbag system fuse and gave the module for repair -they could never repair it despite giving it to multiple persons.
Long story short - they put it back but disconnected the fuses for the airbag module. Also, because of the age of the car, when Hyundai finally tried checking whether a new module was availabe, the module was not even available for purchase.

[vennarbank]

Update is that the components are replaced and i have been given three days to drive and confirm. So far no jerking when slotting to D or R[seems like the gear shift was not working and got stuck in 3rd]. Also no checklight and the drive is smoother. Will provide further updates.

[Jeroen]

Originally Posted by motorguy

Disconnected the airbag system fuse and gave the module for repair -they could never repair it despite giving it to multiple persons.
.

If you have read some of my posts you will know I am happy to repair, if necessary, almost anything.

But I would never ever try to repair an airbag module in a billion years. Either myself or a third party. There is too much at stake. It's not only your safety in case of a crash, but also the thing going off unexpectedly! Which is very likely to lead you to crash your car, with potentially horrendous results to yourself and innocent bystanders.

Yes, it's a lot of money, but no I would simply not take the risk with myself and or others.

Update is that the components are replaced and i have been given three days to drive and confirm. So far no jerking when slotting to D or R[seems like the gear shift was not working and got stuck in 3rd]. Also no checklight and the drive is smoother.

Happy to hear this got sorted. If you're lucky the damage could be due to one of the capacitors starting to leak. That can cause havoc on the board and nearby components.

Jeroen