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 Message Boards » » Reflow solder on an ECU. Who's done it? Page [1]  
Snewf
All American
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The ECU on my 2001 Jeep Cherokee is acting up and I'm thinking about trying to refurb it a bit.

Take it apart, clean it up, remove the conformal coating, reflow the solder points, check for bulging capacitors, reapply conformal coating, reassemble.

Am I missing anything?

What temp should I use for my soldering iron?

4/17/2021 10:54:37 AM

FroshKiller
All American
51547 Posts
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I have never reflowed an ECU, but I have reflowed a PS3. Didn't use a a soldering iron, just a heat gun. I want to say it was like 350 degrees Fahrenheit.

I don't think this information is useful to you, though. Good luck!

4/17/2021 1:27:46 PM

Snewf
All American
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It IS useful. I didn't have even a ballpark temp before.

And it introduced the idea that I could potentially use a hot air pencil instead of a soldering iron.

So, thanks!

4/17/2021 2:04:44 PM

smoothcrim
Universal Magnetic!
18700 Posts
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wash it with peroxide and baking soda

4/17/2021 3:18:06 PM

darkone
(\/) (;,,,;) (\/)
11467 Posts
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Have a pic of the board? Surface mount or through hole or some combination?

It's likely lead free solder so I'd set my iron to around 750-800 F.

If you're going through the trouble, replace all the electrolytic caps.

Also, I'd flux and add solder to the joints rather than attempt a simple reflow.

4/19/2021 4:01:03 PM

Snewf
All American
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I tried to get a replacement from a junkyard but struck out this weekend.

I'm gonna try something else I saw based on the code I'm getting right now but I'll need a little more time.

It MIGHT not be the computer. More time with the mulitmeter.

4/19/2021 4:58:20 PM

theDuke866
All American
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have you looked on eBay for refurbished units, or services that will refurb them? I have purchased a couple of refurbished electronics modules that way (climate control and ABS/traction control/stability control modules for Corvette).

They were VERY reasonably priced.

4/22/2021 11:31:34 PM

Snewf
All American
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I HAVE found a few services that will refurb for me. I might go that route. It's like $120.

I haven't had any time to work on the Heep lately because I'm underwater at work and I keep borrowing my wife's car when I need to drive somewhere.

4/26/2021 5:15:04 PM

tchenku
midshipman
18503 Posts
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http://www.car-part.com bruh



[Edited on April 27, 2021 at 9:42 PM. Reason : ]

4/27/2021 9:41:59 PM

 Message Boards » The Garage » Reflow solder on an ECU. Who's done it? Page [1]  
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