blown ECU but car runs? scanner wont read
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Honda-Tech Member
Joined: Mar 2007
Posts: 899
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From: Stroudsburg, PA, USA
blown ECU but car runs? scanner wont read
I,m working on a Lexus Lx470 for a friend. His wife hooked up jumper cables backwards. I got the car running, but my obd2 scanner will not read the ECU. I took it apart and nothing is burnt or brown.
Why wont my scanner work?
Is it possible for the car to run with a bad ecu?
Why wont my scanner work?
Is it possible for the car to run with a bad ecu?
Honda-Tech Member
Joined: Jun 2004
Posts: 7,539
Likes: 5
From: Sherman Oaks, CA, United States
Re: blown ECU but car runs? scanner wont read
Non Honda question on honda-tech...
No clue about the specific car in question, but some cars do have a backup within the ECU that allows running in a limp mode without full ECU functionality.
No clue about the specific car in question, but some cars do have a backup within the ECU that allows running in a limp mode without full ECU functionality.
Honda-Tech Member
Joined: Mar 2005
Posts: 2,428
Likes: 11
From: CT, US
Re: blown ECU but car runs? scanner wont read
and the ecu is almost definitely fried. hooking jumper cables backwards almost always fries the ecu in almost any car.
check all fuses though first to be sure, may have just popped a fuse or 2, or 20
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