I might have fried the ECU?

2003 TOYOTA 4RUNNER
130,000 MILES
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SYATES3173
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My Battery Died and I changed it out. Now all my dash lights are going crazy, It will start but won't shift in to gear. I checked all the fuses. I was wondering if I might have fried the ECU. I need to replace it.
Jun 20, 2013 at 11:26 AM
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KASEKENNY
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This could be a control module issue but we need to start with checking for codes and finding out if there are any pointing in a different direction. We should do a CAN scan which is easy and can check the BCM, you can get a CAN scanner (Controller Area Network) from Amazon from about $32.00 here is a video to show you how.

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Amazon CAN scanner link:

https://amzn.to/3sX8MCX



Once we know what are there we can take the next steps but the process to test the Body ECU.

Also, I attached the process to replace the ECU below.

Please let us know if you have other questions. Thanks
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May 26, 2021 at 8:40 PM