ABS and "!" lights are ON again! - Page 21 - Toyota Yaris Forums

robkay · 08-25-2014, 10:36 AM

Just stopping back with an update. In April ('14) I reported that I had removed my sensor cables on the rear, cleaned them and put them back on. (I never did get around to doing the front.) Unfortunately, the BRAKE/ABS indicators did not go out and I just kind of resigned myself to leaving it that way for a while--maybe for good.

Well, about 6 weeks ago the BRAKE/ABS indicators turned off. Not certain the ABS is working again, but they are off. So, for a quick history:

My indicators first came on 12/21/13, but then went off the very next day.
On 1/27/14 they came on again and stayed on.
On 4/10/14 I cleaned the rear connectors, but the indicators stayed on.
Sometime in mid-July 2014 the indicators turned off again.

Weirdness. Hoping they stay off, but not counting on it. Still going to pop the fronts off and clean them before cold weather gets here.

sheekeebut · 02-10-2015, 09:43 AM

Digging up this thread. Want to share my experience, which I don't doubt comes from the same problem.

Went to visit the museum last Sunday. Freezing rain, hurrah! Lots of slush and salt downtown as usual. Then, much like all the Torontonians who posted here, I got in the car, started pulling out of the parking garage, and wait, what? An (!) and (ABS) at the same time?

That night, found this thread, took a chance and pulled the rear sensor connectors and blasted the contacts on both ends with CRC MAF sensor cleaner, for lack of other cleaning spray. No dice, errors still stayed on.

Well guess what? Just this morning, like 30 minutes ago, driving down to the office, with error lights on as usual, I was pulling into my parking spot, and, wait, where are those lights? WTF? Just when I was starting to get used to seeing them...

I'm sure I should do those diagnostics per CTScott's info, there must be a dodgy contact somewhere.

robkay · 02-10-2015, 10:00 AM

In my case it was exactly the slushy/salty scenario that seemed to trigger the problem. I am happy to say that even though I only did the rear connectors last April, so far, my indicators have not come back on since last July. The ABS has kicked in a couple times, so I know it works. Now, it is probably accurate to say that, this winter, we have not done as much driving in slushy weather as the winter before. Of course, after I cleaned the rears the indicators didn't go out for 3 months. Did my cleaning actually fix the problem, or was it somewhere else and it finally dried out over the Summer? Who knows. In any case, I'm hoping the problem does not resurface as I do not need that expensive repair. If it happens again I'll clean the fronts and if that doesn't fix it I'll probably just live without the ABS.

IllusionX · 02-10-2015, 11:47 AM

I was looking at digging up this thread. Mine came on a while ago during the ice storm in January. But it quickly turned off as weather warmed up.

I plugged the TechStream tool and it does show rear left sensor issue. I haven't erased it and ABS is working. But the issue I am having now is the rear right wheel locking up.
I haven't seen the ABS light since then, but I still experience rear right wheel locking up, throwing the car to the left until the rest of the ABS system straightens the car...

Logen9Fingers · 03-23-2015, 09:07 AM

Thank you everyone here. You all have helped me fix my dreaded ABS and Brake light issue. Here is what I went through.

Issue:
ABS and Brake light come on and off. It happens randomly with no Rhyme or reason, and would stay on most of the time. The ABS also kicks in when I roll to a stop; it only happens if I am going slow.

Fix:
Removed back 2 wheels (1 at a time). Sprayed cover to speed sensor harness with WD40. Used flat head screw driver to remove the cover. Cleaned cover with WD40. Disconnected harness from speed sensor (used same screwdriver to gently pry it off). Sprayed dielectric spray inside both ends. Reconnected everything.

So happy I did that this weekend before it started snowing again.

trojjanhorse · 08-16-2015, 06:37 PM

Hi everyone

I too own an OBD II bluetooth adapter and like many it did not reveal any fault codes.

I jumped 4&13 and here's the flash pattern i witnessed:

3.3..3.4..3.9..94...repeat

The dots are supposed to be seconds between flashes.

Anyone know what these flash patterns mean?

Thank you.

CTScott · 08-16-2015, 09:35 PM

33 - Right Rear Wheel Speed Sensor Signal
34 - Left Rear Wheel Speed Sensor Signal
39 - Foreign Object is Attached on Tip of Rear Speed Sensor LH
94 - Control Module Communication Bus OFF

trojjanhorse · 08-18-2015, 12:24 AM

Quote:

Originally Posted by CTScott

33 - Right Rear Wheel Speed Sensor Signal
34 - Left Rear Wheel Speed Sensor Signal
39 - Foreign Object is Attached on Tip of Rear Speed Sensor LH
94 - Control Module Communication Bus OFF

Thanks Scott. I opened up the two small harnesses that cage the rear sensors and sprayed contact cleaner. The wires seem fine to me on inspection. I think my problem is a bit more deep seeded. This all happened post rust-proof. Do you have any idea or advise as to what I should do next?

Thank you

CTScott · 08-18-2015, 07:03 AM

I would go back to your undercoating people, as it sounds like they coated the rear sensors.

trojjanhorse · 08-18-2015, 02:00 PM

Quote:

Originally Posted by CTScott

I would go back to your undercoating people, as it sounds like they coated the rear sensors.

Hey Scott,

Thanks again for replying so quick. Always appreciate your words of advice. I live in a different city now and visiting the under-coaters is not really an option for me anymore. Would I have to remove the rear wheels and get intimate with the ABS sensors? Is there a guide/manual that shows how to remove the rear sensors? I got the outer shell open but I don't want to tinker with the wires unless I know exactly how to remove the connectors.

Thanks

CTScott · 08-18-2015, 08:31 PM

Quote:

Originally Posted by trojjanhorse

Hey Scott,

Thanks again for replying so quick. Always appreciate your words of advice. I live in a different city now and visiting the under-coaters is not really an option for me anymore. Would I have to remove the rear wheels and get intimate with the ABS sensors? Is there a guide/manual that shows how to remove the rear sensors? I got the outer shell open but I don't want to tinker with the wires unless I know exactly how to remove the connectors.

Thanks

You have to completely remove the rear hubs to get to the sensors and special tools are required to remove the sensor from the hub to get to the business parts.

Name: Yaris - Rear ABS.jpg
Views: 1003
Size: 82.8 KB

Name: Yaris - Rear ABS.jpg
Views: 1003
Size: 82.8 KB

IllusionX · 01-13-2016, 09:40 PM

I've had the ABS warning light come on last year. First time after 8 years of abuse. The problem seems to be salt is able to find its way into the connector, and make improper contact with the ABS sensor on the hub. Filled it with dielectric grease and it never came back again.

Sent from my ONE A2005 using Tapatalk

LeetViet · 01-16-2016, 10:10 AM

My ABS and ! light came on this week. I took it to the dealership to diagnose and they came up with rear left, and front right. I said hold off on the repair (and they wouldn't inspect my rear right for some reason). Picked the car up, and the light has been off. Took it to another mechanic I trust, and he said to drive it as-is until the lights comes on again.

LeetViet · 04-02-2016, 12:26 PM

My ABS and ! light have been coming on more often. I took it to a small mechanic I trust to diagnose.

ALL my sensors showed up on the history, which led my mechanic to think it wasn't a sensor problem. The mechanic cleared the codes, and went for a drive. My right rear sensor came on immediately. I'm going to drive it for a week or so, and go back to see if the other sensors will come up again.

"G" · 04-02-2016, 01:23 PM

Cars don't fix them selves.

LeetViet · 04-16-2016, 10:36 AM

Took the Yaris back to my mechanic. The rear right, and ONLY the rear right, ABS sensor came up on the scan. I'm going to replace the rear right and the harness next Saturday. Hopefully that'll be the end of things.

tmontague · 04-23-2016, 01:57 PM

Is there a reason the mechanic only replaced one sensor? Any of the 4 sensors could cause the issue so replacing one is good, but not if the other 3 are also causing the issue

z0mb13k1ll · 04-23-2016, 02:47 PM

had mine go 4 or so years ago, was told it was $700+ to repair so i pulled off the gauge cluster and covered the lights with electrical tape behind the face. Last year when i replaced my front bearings i noticed a ton of corrosion on the speed sensors.

Really a problem that should have been addressed by Toyota. :(

Edit: never really needed the ABS, just buying some good tires and brakes and my little Yarii can plow through winter like no tomorrow

08-25-2014, 10:36 AM	#1
robkay Drives: Hatch Join Date: May 2009 Location: NW OH Posts: 93	Just stopping back with an update. In April ('14) I reported that I had removed my sensor cables on the rear, cleaned them and put them back on. (I never did get around to doing the front.) Unfortunately, the BRAKE/ABS indicators did not go out and I just kind of resigned myself to leaving it that way for a while--maybe for good. Well, about 6 weeks ago the BRAKE/ABS indicators turned off. Not certain the ABS is working again, but they are off. So, for a quick history: My indicators first came on 12/21/13, but then went off the very next day. On 1/27/14 they came on again and stayed on. On 4/10/14 I cleaned the rear connectors, but the indicators stayed on. Sometime in mid-July 2014 the indicators turned off again. Weirdness. Hoping they stay off, but not counting on it. Still going to pop the fronts off and clean them before cold weather gets here. Last edited by robkay; 08-25-2014 at 10:51 AM.

02-10-2015, 10:00 AM	#3
robkay Drives: Hatch Join Date: May 2009 Location: NW OH Posts: 93	In my case it was exactly the slushy/salty scenario that seemed to trigger the problem. I am happy to say that even though I only did the rear connectors last April, so far, my indicators have not come back on since last July. The ABS has kicked in a couple times, so I know it works. Now, it is probably accurate to say that, this winter, we have not done as much driving in slushy weather as the winter before. Of course, after I cleaned the rears the indicators didn't go out for 3 months. Did my cleaning actually fix the problem, or was it somewhere else and it finally dried out over the Summer? Who knows. In any case, I'm hoping the problem does not resurface as I do not need that expensive repair. If it happens again I'll clean the fronts and if that doesn't fix it I'll probably just live without the ABS. Last edited by robkay; 02-10-2015 at 10:13 AM.

02-10-2015, 11:47 AM	#4
IllusionX It's the illusion you see View User's Garage Drives: 07 Yaris Sedan Aero Join Date: Oct 2006 Location: Brossard, QC Posts: 3,887	I was looking at digging up this thread. Mine came on a while ago during the ice storm in January. But it quickly turned off as weather warmed up. I plugged the TechStream tool and it does show rear left sensor issue. I haven't erased it and ABS is working. But the issue I am having now is the rear right wheel locking up. I haven't seen the ABS light since then, but I still experience rear right wheel locking up, throwing the car to the left until the rest of the ABS system straightens the car... __________________

08-16-2015, 09:35 PM	#7
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,450	33 - Right Rear Wheel Speed Sensor Signal 34 - Left Rear Wheel Speed Sensor Signal 39 - Foreign Object is Attached on Tip of Rear Speed Sensor LH 94 - Control Module Communication Bus OFF __________________

08-18-2015, 07:03 AM	#9
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,450	I would go back to your undercoating people, as it sounds like they coated the rear sensors. __________________

02-10-2015, 09:43 AM	#2
sheekeebut Minimalist Drives: 07 silver sedan Join Date: Jun 2014 Location: Mississauga, GTA, Toronto, ON Posts: 432	Digging up this thread. Want to share my experience, which I don't doubt comes from the same problem. Went to visit the museum last Sunday. Freezing rain, hurrah! Lots of slush and salt downtown as usual. Then, much like all the Torontonians who posted here, I got in the car, started pulling out of the parking garage, and wait, what? An (!) and (ABS) at the same time? That night, found this thread, took a chance and pulled the rear sensor connectors and blasted the contacts on both ends with CRC MAF sensor cleaner, for lack of other cleaning spray. No dice, errors still stayed on. Well guess what? Just this morning, like 30 minutes ago, driving down to the office, with error lights on as usual, I was pulling into my parking spot, and, wait, where are those lights? WTF? Just when I was starting to get used to seeing them... I'm sure I should do those diagnostics per CTScott's info, there must be a dodgy contact somewhere.

03-23-2015, 09:07 AM	#5
Logen9Fingers I've made a post! Drives: 2007 Yaris sedan Join Date: Mar 2015 Location: Chicago Posts: 1	Thank you everyone here. You all have helped me fix my dreaded ABS and Brake light issue. Here is what I went through. Issue: ABS and Brake light come on and off. It happens randomly with no Rhyme or reason, and would stay on most of the time. The ABS also kicks in when I roll to a stop; it only happens if I am going slow. Fix: Removed back 2 wheels (1 at a time). Sprayed cover to speed sensor harness with WD40. Used flat head screw driver to remove the cover. Cleaned cover with WD40. Disconnected harness from speed sensor (used same screwdriver to gently pry it off). Sprayed dielectric spray inside both ends. Reconnected everything. So happy I did that this weekend before it started snowing again.

08-16-2015, 06:37 PM	#6
trojjanhorse Drives: 2007 Yaris LE Join Date: Jan 2014 Location: Canada Posts: 8	Hi everyone I too own an OBD II bluetooth adapter and like many it did not reveal any fault codes. I jumped 4&13 and here's the flash pattern i witnessed: 3.3..3.4..3.9..94...repeat The dots are supposed to be seconds between flashes. Anyone know what these flash patterns mean? Thank you.

01-13-2016, 09:40 PM	#12
IllusionX It's the illusion you see View User's Garage Drives: 07 Yaris Sedan Aero Join Date: Oct 2006 Location: Brossard, QC Posts: 3,887	I've had the ABS warning light come on last year. First time after 8 years of abuse. The problem seems to be salt is able to find its way into the connector, and make improper contact with the ABS sensor on the hub. Filled it with dielectric grease and it never came back again. Sent from my ONE A2005 using Tapatalk __________________

01-16-2016, 10:10 AM	#13
LeetViet Drives: 07 Yaris 4DR Join Date: Jun 2009 Location: Toronto, Ontario Posts: 98	My ABS and ! light came on this week. I took it to the dealership to diagnose and they came up with rear left, and front right. I said hold off on the repair (and they wouldn't inspect my rear right for some reason). Picked the car up, and the light has been off. Took it to another mechanic I trust, and he said to drive it as-is until the lights comes on again.

04-02-2016, 12:26 PM	#14
LeetViet Drives: 07 Yaris 4DR Join Date: Jun 2009 Location: Toronto, Ontario Posts: 98	My ABS and ! light have been coming on more often. I took it to a small mechanic I trust to diagnose. ALL my sensors showed up on the history, which led my mechanic to think it wasn't a sensor problem. The mechanic cleared the codes, and went for a drive. My right rear sensor came on immediately. I'm going to drive it for a week or so, and go back to see if the other sensors will come up again.

04-02-2016, 01:23 PM	#15
"G" Drives: 2007 Yaris Hatch Join Date: Feb 2007 Location: Chicago Posts: 346	Cars don't fix them selves.

04-16-2016, 10:36 AM	#16
LeetViet Drives: 07 Yaris 4DR Join Date: Jun 2009 Location: Toronto, Ontario Posts: 98	Took the Yaris back to my mechanic. The rear right, and ONLY the rear right, ABS sensor came up on the scan. I'm going to replace the rear right and the harness next Saturday. Hopefully that'll be the end of things.

04-23-2016, 01:57 PM	#17
tmontague View User's Garage Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012 Location: Caledonia Ont. Posts: 2,930	Is there a reason the mechanic only replaced one sensor? Any of the 4 sensors could cause the issue so replacing one is good, but not if the other 3 are also causing the issue __________________ No one ever wants to give a Yaris the point by...

04-23-2016, 02:47 PM	#18
z0mb13k1ll View User's Garage Drives: '15 Dodge Challenger Join Date: Aug 2011 Location: Grimsby, Ontario Posts: 44	had mine go 4 or so years ago, was told it was $700+ to repair so i pulled off the gauge cluster and covered the lights with electrical tape behind the face. Last year when i replaced my front bearings i noticed a ton of corrosion on the speed sensors. Really a problem that should have been addressed by Toyota. :( Edit: never really needed the ABS, just buying some good tires and brakes and my little Yarii can plow through winter like no tomorrow