Airbag light panel is ON - Toyota Yaris Forums

Josepe-sv · 02-22-2011, 12:12 PM

This 2008 model just start the light ON, when the mileage was in 35,000 miles

Is a maintenance issue?
There is no any hit recent.
Can be a sensor?

Can be delete the alert message by reset (like MAINT REQ alert)?

CTScott · 02-22-2011, 12:44 PM

You can get the SRS ECU to tell you what the code is for the problem by following this procedure:

1. Turn the ignition off. With a jumper, connect the TC and CG terminals on the OBD port.

2. Turn the ignition on. The SRS (airbag) light will flash in a pattern to indicate the stored DTCs (diagnostic trouble codes). Each code will be short flashes, separated by pauses (for example 32 would be flash, flash, flash, pause, flash, flash). Each 2 digit code will be separated by a longer pause, and then the codes will repeat until you turn off the ignition.

To clear the stored codes and reset the light do the following:

1. Turn the ignition off. With a jumper, connect the TC and CG terminals on the OBD port.

2. Turn the ignition on. When the SRS light starts flashing the codes, within 3 to 10 seconds remove the jumper frm TC. After 3 seconds the SRS light will come on solid.

3. Within 2 to 4 seconds after the SRS lights, reconnect the jumper to TC.

4. Within 2 to 4 seconds the SRS light will go off. Once it does, within 2 to 4 seconds disconnect TC.

5. Within 2 to 4 seconds the SRS light will come one solid again. Within 2 to 4 seconds after the SRS lights, reconnect the jumper to TC.

6. Within 2 to 4 seconds the SRS light will go off. One second later, if all DTCs are cleared the SRS light will flash steadily on and off. If codes are still registered it will flash in the pattern to indicate the stored codes.

Vinceb · 02-22-2011, 02:36 PM

wow, thats a fair bit of instructions just to clear DTC's, is it just a jumper wire, straight short? or should you use a resistor?

CTScott · 02-22-2011, 02:42 PM

Quote:

Originally Posted by Vinceb

wow, thats a fair bit of instructions just to clear DTC's, is it just a jumper wire, straight short? or should you use a resistor?

Actually it's a nice thing that you can clear them at all without needing a TechStream tool.

Literally just a jumper wire is all that is required (i.e. you are shorting the two pins together).

bert66 · 04-23-2012, 06:17 PM

G'day CT. Went through the process several times. Problem still not solved. The light would not go out at step 4. Do you have an idea of what that would indicate. Regards Bert

Ulisses03hd · 07-17-2012, 08:30 PM

Bump

nseries · 07-21-2012, 09:26 PM

I have just done the diagnostic and the airbag light keep on flashing steadily. I'm not sure what is the codes as it wont pause in between, when i disconnect the pin, the airbag light solid. What could be the possible problem?

Thanks

CTScott · 07-21-2012, 09:42 PM

Quote:

Originally Posted by nseries

I have just done the diagnostic and the airbag light keep on flashing steadily. I'm not sure what is the codes as it wont pause in between, when i disconnect the pin, the airbag light solid. What could be the possible problem?

Thanks

That procedure is only for 06+ Yaris.

nseries · 07-22-2012, 01:40 AM

Thanks for the reply. I'm planning to send to service center if there is no other manual ways to get the codes and reset.

nseries · 07-23-2012, 03:29 AM

I managed to get to scan the codes from my friend. However,I just contacted the authorized service center and i made an appointment for next week diagnostic.

As using my friend diagnostic tools, i got an error code of U2100 DTC. I've scanned through at internet and it reported CAN communication off or dysfunction. Can someone elaborate more on this? I'm just curios as the CAN bus off will light up the airbag symbol in my car dash.

Thanks all...:)

CTScott · 07-23-2012, 10:17 AM

Quote:

Originally Posted by nseries

I managed to get to scan the codes from my friend. However,I just contacted the authorized service center and i made an appointment for next week diagnostic.

As using my friend diagnostic tools, i got an error code of U2100 DTC. I've scanned through at internet and it reported CAN communication off or dysfunction. Can someone elaborate more on this? I'm just curios as the CAN bus off will light up the airbag symbol in my car dash.

Thanks all...:)

That CAN bus error is a generic one, which probably indicates that the scan tool does not support the protocol for talking to your car's SRS ECU.

nseries · 07-23-2012, 11:01 AM

Hi CTScott,

Thanks for your prompt reply. I was worried and look around at the web regarding this error code U2100. It seems so serious if that is really the problem of CAN BUS dysfunction. I shall be able to get back to here whats the possible cause after i send my car to service center next week.

I hope nothing serious will happen to my SRS airbag system or the computer inside the vehicle.

Thanks so much,
Cheers,

From all the way Malaysia! =)

tooter · 07-23-2012, 11:40 AM

One of the air bags losing its activation pressure could make the light stay on. I'll guess that they have low air pressure sensors similar to the valve stems on the wheels.

CTScott · 07-23-2012, 12:26 PM

Quote:

Originally Posted by tooter

One of the air bags losing its activation pressure could make the light stay on. I'll guess that they have low air pressure sensors similar to the valve stems on the wheels.

I don't know if you intended this as a bit of humor, but this could not be more incorrect as to how air bags function.

tooter · 07-23-2012, 12:59 PM

I'm glad to amuse you CT... but even more humorous, I was serious.

Air+ bag = a bag full of air.

What activates airbags?

CTScott · 07-23-2012, 01:21 PM

Quote:

Originally Posted by tooter

I'm glad to amuse you CT... but even more humorous, I was serious.

Air+ bag = a bag full of air.

What activates airbags?

They are basically little bombs. There is an explosive charge in the squib that is electrically detonated to rapidly fill the bag (with hot, stinky gas, as opposed to air). The SRS system makes sure that they are ready to fire at all times, by running a low voltage through the squib and looking for the voltage drop across it. That allows the system to detect that the squib circuit is open (broken wire) or shorted.

tooter · 07-23-2012, 03:12 PM

Wow... stinkbombs. Thanks so much for the information CT, I understand now. I had just guessed that they were powered by little CO2 cartridges.

nseries · 07-24-2012, 04:12 AM

Its just too complicated for me. :( I just hope the SRS airbag wont deploy out of sudden. I need to drive to work everyday until next week for service appointment.

02-22-2011, 12:12 PM	#1
Josepe-sv Drives: Yaris 2008 HB 1.5 Join Date: Nov 2009 Location: EL SALVADOR, SV Posts: 74	Airbag light panel is ON This 2008 model just start the light ON, when the mileage was in 35,000 miles Is a maintenance issue? There is no any hit recent. Can be a sensor? Can be delete the alert message by reset (like MAINT REQ alert)?

02-22-2011, 12:44 PM	#2
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	You can get the SRS ECU to tell you what the code is for the problem by following this procedure: 1. Turn the ignition off. With a jumper, connect the TC and CG terminals on the OBD port. 2. Turn the ignition on. The SRS (airbag) light will flash in a pattern to indicate the stored DTCs (diagnostic trouble codes). Each code will be short flashes, separated by pauses (for example 32 would be flash, flash, flash, pause, flash, flash). Each 2 digit code will be separated by a longer pause, and then the codes will repeat until you turn off the ignition. To clear the stored codes and reset the light do the following: 1. Turn the ignition off. With a jumper, connect the TC and CG terminals on the OBD port. 2. Turn the ignition on. When the SRS light starts flashing the codes, within 3 to 10 seconds remove the jumper frm TC. After 3 seconds the SRS light will come on solid. 3. Within 2 to 4 seconds after the SRS lights, reconnect the jumper to TC. 4. Within 2 to 4 seconds the SRS light will go off. Once it does, within 2 to 4 seconds disconnect TC. 5. Within 2 to 4 seconds the SRS light will come one solid again. Within 2 to 4 seconds after the SRS lights, reconnect the jumper to TC. 6. Within 2 to 4 seconds the SRS light will go off. One second later, if all DTCs are cleared the SRS light will flash steadily on and off. If codes are still registered it will flash in the pattern to indicate the stored codes. __________________

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02-22-2011, 02:36 PM	#3
Vinceb Drives: 2008 5 Speed Sedan Join Date: Jan 2011 Location: Nova Scotia, Canada Posts: 77	wow, thats a fair bit of instructions just to clear DTC's, is it just a jumper wire, straight short? or should you use a resistor?

04-23-2012, 06:17 PM	#5
bert66 Drives: 2009 toyota yaris Join Date: Apr 2012 Location: townsville Posts: 13	G'day CT. Went through the process several times. Problem still not solved. The light would not go out at step 4. Do you have an idea of what that would indicate. Regards Bert

07-17-2012, 08:30 PM	#6
Ulisses03hd I've made a post! Drives: 08 Yaris Join Date: Jul 2012 Location: Socal Posts: 1	Bump

07-21-2012, 09:26 PM	#7
nseries Drives: Vios 04 Join Date: May 2012 Location: Brunei Posts: 5	I have just done the diagnostic and the airbag light keep on flashing steadily. I'm not sure what is the codes as it wont pause in between, when i disconnect the pin, the airbag light solid. What could be the possible problem? Thanks

07-22-2012, 01:40 AM	#9
nseries Drives: Vios 04 Join Date: May 2012 Location: Brunei Posts: 5	Thanks for the reply. I'm planning to send to service center if there is no other manual ways to get the codes and reset.

07-23-2012, 03:29 AM	#10
nseries Drives: Vios 04 Join Date: May 2012 Location: Brunei Posts: 5	I managed to get to scan the codes from my friend. However,I just contacted the authorized service center and i made an appointment for next week diagnostic. As using my friend diagnostic tools, i got an error code of U2100 DTC. I've scanned through at internet and it reported CAN communication off or dysfunction. Can someone elaborate more on this? I'm just curios as the CAN bus off will light up the airbag symbol in my car dash. Thanks all...:)

07-23-2012, 11:01 AM	#12
nseries Drives: Vios 04 Join Date: May 2012 Location: Brunei Posts: 5	Hi CTScott, Thanks for your prompt reply. I was worried and look around at the web regarding this error code U2100. It seems so serious if that is really the problem of CAN BUS dysfunction. I shall be able to get back to here whats the possible cause after i send my car to service center next week. I hope nothing serious will happen to my SRS airbag system or the computer inside the vehicle. Thanks so much, Cheers, From all the way Malaysia! =)

07-23-2012, 11:40 AM	#13
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,961	One of the air bags losing its activation pressure could make the light stay on. I'll guess that they have low air pressure sensors similar to the valve stems on the wheels.

07-23-2012, 12:59 PM	#15
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,961	I'm glad to amuse you CT... but even more humorous, I was serious. Air+ bag = a bag full of air. What activates airbags?

07-23-2012, 03:12 PM	#17
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,961	Wow... stinkbombs. Thanks so much for the information CT, I understand now. I had just guessed that they were powered by little CO2 cartridges.

07-24-2012, 04:12 AM	#18
nseries Drives: Vios 04 Join Date: May 2012 Location: Brunei Posts: 5	Its just too complicated for me. :( I just hope the SRS airbag wont deploy out of sudden. I need to drive to work everyday until next week for service appointment.