ECU Ticking?

E28 technical advice asked and given! Troubleshooting, modifications and more.
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codybalcomb
Posts: 3
Joined: Mar 07, 2023 7:23 PM
Location: washington

ECU Ticking?

Post by codybalcomb »

I just got my hand on a 1984 BMW 533i and it had a plethera of electrical issues. I took the ECU apart becasue the previous owner jumped one of the wires. And when taking it apart I found a burnt track on the circut board. I fixed it with copper wire and solder. I pluged it back in and the car runs again with the ECU fully pluged in but now every so often it will begin to tick rapidly and then stop for a bit and then tick rapidly again. It happens along with the speaker going off so I thought it was part of maybe a seat belt warning or a door alarm. But when I close the door the ticking doesnt go away but the speaker turns off. What do you thing it causing this?
Galahad
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Location: Beverly/Worcester, MA
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Re: ECU Ticking?

Post by Galahad »

Could you post a picture of what you repaired?
codybalcomb
Posts: 3
Joined: Mar 07, 2023 7:23 PM
Location: washington

Re: ECU Ticking?

Post by codybalcomb »

Image I have no clue how to get this as a photo
John in VA
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Joined: Feb 12, 2006 12:00 PM
Location: Leesburg, VA

Re: ECU Ticking?

Post by John in VA »

You need to have a URL for your photos - then post that between Image
See How to Post Photos, Pictures, and other Images: viewtopic.php?f=1&t=147488
codybalcomb
Posts: 3
Joined: Mar 07, 2023 7:23 PM
Location: washington

Re: ECU Ticking?

Post by codybalcomb »

Image
That is the damage on the board and I bend copper wire and soldered it in and watched multiple YouTube videos about how to do it properly so I feel confident in my work. I found a guy on Facebook market place selling parts for a 533i and I am talking to him about buying his ECU if that's the problem.
But I would like to know before I buy it from him.
Shawn D.
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Beamter
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Re: ECU Ticking?

Post by Shawn D. »

Welcome, codybalcomb! I see these are your first posts. Please read and heed the Tech and Forum FAQ sections and post technical questions in Tech Talk, not General Conversation.
Galahad
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Re: ECU Ticking?

Post by Galahad »

Image

That sure looks toasty. Anyone know what that trace does?
Mike W.
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Location: California Whine Country

Re: ECU Ticking?

Post by Mike W. »

The problem is you have to figure out what failed to cause the trace to burn up. It's a symptom, not the cause.
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