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Old 4th December 2008, 21:04   #1
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Default ECU busted! please be careful before going for a power wash!

This happened recently. I was in my friends place who owns a MASS. There was 2 months old OMNI which was checked from top to bottom for not being able to start. He asked for my opinion.
After checking all the sensors, we came to the conclusion that ECU might be the suspects. OMNI ECU failing is next to impossible, well! atleast thats what his head mechanic said. And to some extent he was right it was the water that busted the ECU.
We opened the sealed compartment found the rust that busted most of the SMDs. I tried to repair the ECU by cleaning with alcohol and using a SMD workstation but in vain. We got the new one but the poor owner's pocket was lighted by whooping 14k, tax included.

Well I havn't seen ECU of all the cars. But this particluar example was not sealed enough. The unused points/holes left for connectors were left unsealed by Mitsubishi/Maruti.

Please be careful before giving it for a wash. As these people have got no idea were their powerful water jet will land.

Also if you are a DIY guy, please seal your ECU with a silicone. Dr. Fixit will do.

Check the marked area.

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Issued in the Interest of Fellow Members

Last edited by SirAlec : 4th December 2008 at 21:07.
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Old 4th December 2008, 21:13   #2
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Has the iCATs been commissioned?
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Old 4th December 2008, 21:13   #3
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Is that a Mitsubishi logo I spy at the edge of the PCB?

Also, many cars have their ECU inside the cabin these days, so they should be better protected against a power wash.
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Old 4th December 2008, 21:21   #4
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Quote:
Originally Posted by ImmortalZ View Post
Is that a Mitsubishi logo I spy at the edge of the PCB?

Also, many cars have their ECU inside the cabin these days, so they should be better protected against a power wash.
First ANs: yeah mitsubishi electric supplies ECU for most of japs cars.

Second ANswer: Think again following is the ECU of a now very popular car. The Vdi. It has its ECU under the hood.
But the OMNI has it inside the cabin below the dash. But water entered anyway.


Quote:
Originally Posted by anupmathur View Post
Has the iCATs been commissioned?
what is that.?? if you meant by ECU analyzer. My friend has a small MASS, so he doesn't has any.

ECU under the hood.
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Old 4th December 2008, 21:33   #5
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Quote:
Originally Posted by anupmathur View Post
Has the iCATs been commissioned?
Quote:
Originally Posted by SirAlec View Post
what is that.??
The Anti-theft system whereby only the original ignition key will allow the car to be started. Otherwise the ECU will simply not allow the car to start.
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Old 4th December 2008, 22:03   #6
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Quote:
Originally Posted by anupmathur View Post
The Anti-theft system whereby only the original ignition key will allow the car to be started. Otherwise the ECU will simply not allow the car to start.
that system in a OMNI?
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Old 4th December 2008, 22:27   #7
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Since it is only a two months old it should have iCATS. All the Maruti vehicles now has iCATS (from 800 base onwards). Both my Swift and 800 has it.

If by any chance you were trying to start with a duplicate key made, it wont start. But since the vehicle is new and inspected by MASS / head technician there's little chance. He would have noticed if the key was not original.
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Old 4th December 2008, 22:32   #8
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Default Water and electricity

Two of the things that India needs badly is poison to the ECU. Electricity is there in the ECU but Iam talking about the jolts the ECU is liable to get when some nut puts on the welding machine without removing the battery terminals. Its better to remove the ECU connectors too before welding.

Advice before washing the engine compartment especially GTX owners is to cover the ecu with a polythene bag.
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Old 4th December 2008, 22:37   #9
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this is a blown ECU my MASS blew my cars powersteering controller. 5months without it in my wagonR was hell. and it cost 7k!!!!
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Old 5th December 2008, 07:40   #10
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I have never allowed service guys to wash my engine bay with pressure spray. They think I am some kind of nut and profess to me their experience and how nothing would happen. With so many sensors and electronics around, I did not want to take a chance, and always refused politely(sometimes agrressive if the advisor tried to play smart). I used to clean the bay with a cloth, when required.
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Old 5th December 2008, 09:55   #11
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+1 with Kuttapan for that , what i ask them to do is to use compressed air to blwo off the dust and then clean with wet cloth nothing more nothing less ... way too much electronics in there to be comfortably using water cleaning inside the hood.
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Old 5th December 2008, 10:15   #12
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7K for new ECM? I heard WagonR ECU costs more thatn 14k (from M.A.S.S.)

Are you sure it was the ECU and not the Powersteering Fuse?

I had earlier posted a contact number of a person who does ECU repairs.

http://www.team-bhp.com/forum/techni...irs-palio.html (ECU repairs for palio)


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this is a blown ECU my MASS blew my cars powersteering controller. 5months without it in my wagonR was hell. and it cost 7k!!!!
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Old 5th December 2008, 12:33   #13
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Thanks for the headsup, man! I don't think my cars are going to be subjected to an under-the-hood powerwash anymore. Going to go with Kuttapans suggestion of using a wet cloth.
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