Toyota Yaris Forums - Ultimate Yaris Enthusiast Site
 

 


 
Go Back   Toyota Yaris Forums - Ultimate Yaris Enthusiast Site > Technical Forums > DIY / Maintenance / Service
  The Tire Rack

Reply
 
Thread Tools Display Modes
Old 11-23-2021, 07:12 PM   #1
CrimsonEclipse
 
Drives: .
Join Date: Mar 2019
Location: .
Posts: 17
Multiple Codes including Airbag

As follows

U0100 EMPS
C1201 ABS/VSC/TRAC
C1241 ABS/VSC/TRAC
B1771 Occupation Detection
B1801 SRS Airbag
B1811 SRS Airbag

It is also accompanied by an airbag light

This all occurred after some front end maintenance which included lowering the crossmember and disconnecting the steering assembly.

It seems to think that there is a short to the airbag squib.

So somehow I've manage to disconnect or fry an ECM module.

Where should I look first?

I tried resetting the system by disconnecting the battery and by using an ODB2 tool and neither worked.

Is this an expensive repair?
I don't think it will pass inspection with the airbag light on.
CrimsonEclipse is offline   Reply With Quote
Old 11-24-2021, 07:00 AM   #2
stidnam
 
Drives: Starlet
Join Date: Nov 2017
Location: Australia
Posts: 155
Bit of a strange combination of codes. The only computer up front in the bay besides the ecm is the abs module. Did that get unplugged? What else got unplugged during this maintenance? There's nothing attached to the cross member or steering rack that should cause that.

Do you have access to techstream?
stidnam is offline   Reply With Quote
Old 11-24-2021, 07:03 AM   #3
stidnam
 
Drives: Starlet
Join Date: Nov 2017
Location: Australia
Posts: 155
Actually, any chance the steering wheel got rotated when disconnected, resulting in damage to the clock spring? That would certainly account for the drivers airbag code.
stidnam is offline   Reply With Quote
Old 11-24-2021, 05:08 PM   #4
CrimsonEclipse
 
Drives: .
Join Date: Mar 2019
Location: .
Posts: 17
Quote:
Originally Posted by stidnam View Post
Bit of a strange combination of codes. The only computer up front in the bay besides the ecm is the abs module. Did that get unplugged? What else got unplugged during this maintenance? There's nothing attached to the cross member or steering rack that should cause that.

Do you have access to techstream?
I didn't unplug anything.
I do have access to techstream.

Quote:
Originally Posted by stidnam View Post
Actually, any chance the steering wheel got rotated when disconnected, resulting in damage to the clock spring? That would certainly account for the drivers airbag code.
I've come to a similar conclusion and ordered a clock spring.
It is possible that the steering wheel position sensor is also referenced with the ABS so knocking out the clock spring assembly might also effect that.

Oddly enough, the horn still works.
CrimsonEclipse is offline   Reply With Quote
Old 11-25-2021, 06:30 AM   #5
stidnam
 
Drives: Starlet
Join Date: Nov 2017
Location: Australia
Posts: 155
The clock spring likely has two ribbon cables inside. You may have only snapped or dislodged one. I've seen a clock spring where the airbag worked but the rest of the buttons didnt. After pulling it apart I found one ribbon cable broken.

Also good point regarding the angle sensor. May need to be recalibrated.
stidnam is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Multiple fault codes but no CEL Neinris DIY / Maintenance / Service 27 03-16-2021 09:56 PM
OFFICIAL Yaris SEDAN thread SimmZ Photo-Video-Media Gallery 1705 01-13-2020 12:20 PM
Airbag - can't clear code 32 after rough passenger ehud42 DIY / Maintenance / Service 1 11-05-2019 04:03 PM
DIY aftermarket steering wheel install with horn and airbag delete tmontague Performance Modifications 19 11-30-2018 01:19 PM
Airbag codes othater DIY / Maintenance / Service 22 09-03-2012 09:51 AM


All times are GMT -4. The time now is 02:08 PM.




YarisWorld
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.