How to conduct an ECU relearn?

Tiny
KOUBEAR
  • MEMBER
  • 2018 TOYOTA CAMRY
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 20,000 MILES
Does anyone know how would an ECU would take to relearn things after replacing a car battery and is there a way to confirm it?
Do you
have the same problem?
Yes
No
Monday, October 25th, 2021 AT 1:11 PM

19 Replies

Tiny
SQM
  • EXPERT
Hello,

After the battery is replaced, there are two procedures need to be performed.

1.Perform steering sensor zero-point calibration
2.Memorize steering angle neutral point

I have attached the both of those procedures below.

Please let me know of any questions.
Thank you.

https://www.2carpros.com/articles/how-to-replace-a-car-battery
Was this
answer
helpful?
Yes
No
Monday, October 25th, 2021 AT 5:19 PM
Tiny
KOUBEAR
  • MEMBER
Hi, what others procedure do I need to do or relearn? Will I still be able to get dtc code on my obd scanner even though I changed the battery because I did it and it says I got none?
Was this
answer
helpful?
Yes
No
Thursday, October 28th, 2021 AT 3:10 AM
Tiny
SQM
  • EXPERT
According to Toyota those are the two relearns needs to be done after a battery change.
As for the codes, if any issues still exist it will get triggered again and you will be able to read them.
Was this
answer
helpful?
Yes
No
Thursday, October 28th, 2021 AT 8:51 AM
Tiny
KOUBEAR
  • MEMBER
Okay, thanks. I read it should have cleared all existing code and I didn't use a memory saver or anything. I got the obd on Amazon and it says it was compatible but when I looked it up on their website it wasn't.
Was this
answer
helpful?
Yes
No
Friday, October 29th, 2021 AT 5:21 AM
Tiny
SQM
  • EXPERT
Curious what type of code reader was it? For just reading the codes, just about any of the OBDII readers will do that task. Unless you want to read live data or other programing function, which will require specific kind.
Was this
answer
helpful?
Yes
No
Friday, October 29th, 2021 AT 6:37 AM
Tiny
KOUBEAR
  • MEMBER
It's a Innova 3100rs Fixassist.
Was this
answer
helpful?
Yes
No
Friday, October 29th, 2021 AT 11:39 AM
Tiny
SQM
  • EXPERT
This is compatible with all the OBDII vehicles (1996 and newer).
So, it should work. I know this one can also do live data as well as airbag and ABS codes.
Was this
answer
helpful?
Yes
No
Friday, October 29th, 2021 AT 12:39 PM
Tiny
KOUBEAR
  • MEMBER
I thought so, maybe it's just me.
Was this
answer
helpful?
Yes
No
Friday, October 29th, 2021 AT 1:34 PM
Tiny
SQM
  • EXPERT
It is possible that the scanner itself has a bad cable or defective.
Was this
answer
helpful?
Yes
No
Friday, October 29th, 2021 AT 1:36 PM
Tiny
KOUBEAR
  • MEMBER
It's possible. Maybe.
Was this
answer
helpful?
Yes
No
Friday, October 29th, 2021 AT 1:54 PM
Tiny
KOUBEAR
  • MEMBER
Ran my obd scanner and this is what I founded:
Was this
answer
helpful?
Yes
No
Friday, October 29th, 2021 AT 2:05 PM
Tiny
KOUBEAR
  • MEMBER
Hey.
Was this
answer
helpful?
Yes
No
Friday, October 29th, 2021 AT 8:51 PM
Tiny
SQM
  • EXPERT
So those are historical codes. Are you currently having any specific issues?
Inactive code can be stored in the computer but that will not impact the drivability.
Was this
answer
helpful?
Yes
No
Sunday, October 31st, 2021 AT 12:44 PM
Tiny
KOUBEAR
  • MEMBER
I have no codes when I run my obd2 test, but I know it just doesn't feel the same I know there is an issue.
Was this
answer
helpful?
Yes
No
Monday, November 1st, 2021 AT 11:13 AM
Tiny
SQM
  • EXPERT
I have attached the reset procedure for the hybrid ECU below. Let me know if you are able to run through those steps.
Was this
answer
helpful?
Yes
No
Tuesday, November 2nd, 2021 AT 5:58 PM
Tiny
KOUBEAR
  • MEMBER
Hey, my car is not a hybrid? Will the same process still work? FYI my car is in the auto shop to fix my rear bumper damage.
Was this
answer
helpful?
Yes
No
Friday, November 5th, 2021 AT 4:44 PM
Tiny
SQM
  • EXPERT
Well, the code showed to be for the Hybrid Camry. And that procedure is for the ECU of the Hybrid system.
Was this
answer
helpful?
Yes
No
Saturday, November 6th, 2021 AT 8:04 PM
Tiny
KOUBEAR
  • MEMBER
Hmm, that's so weird.
Was this
answer
helpful?
Yes
No
Friday, November 12th, 2021 AT 5:55 AM
Tiny
SQM
  • EXPERT
So, is the check engine light currently illuminated? If so what are the codes?
Was this
answer
helpful?
Yes
No
Friday, November 12th, 2021 AT 8:37 AM

Please login or register to post a reply.

Sponsored links