ABS and Emerg Brake Lights On - Need Advice - Toyota Yaris Forums

CTScott · 02-03-2013, 09:10 PM

Quote:

Originally Posted by 2o6

Hmmn. I think something got wet that wasn't supposed to; It was pretty nasty outside yesterday, all sorts of slush. My car is originally from California, so not much rust, I don't think they'd both all be broken off (and at the same time nonetheless). I'll put it on the lift at my job (I work at a dealership) and see if I can clean off and grease down those connectors.

That generally works, right?

It is definitely odd for both to have failed close together, so it is possible that the problem is upstream of them. Their wiring meets for the first time at connector AJ1. which is above the top of the under-dash fuse panel. From there they go through the firewall to the large connector on the ABS ECU. You might want to start by checking the ABS ECU connector under the hood.

2o6 · 02-03-2013, 09:14 PM

Quote:

Originally Posted by CTScott

It is definitely odd for both to have failed close together, so it is possible that the problem is upstream of them. Their wiring meets for the first time at connector AJ1. which is above the top of the under-dash fuse panel. From there they go through the firewall to the large connector on the ABS ECU. You might want to start by checking the ABS ECU connector under the hood.

Which looks like....? (LOL)

I did have a blown fuse a short while for my rad fan; possible electrical niggles blew something else up?

CTScott · 02-03-2013, 09:52 PM

Quote:

Originally Posted by 2o6

Which looks like....? (LOL)

I did have a blown fuse a short while for my rad fan; possible electrical niggles blew something else up?

The ABS ECU is the chunk with the connector, attached to the bottom of the brake master cylinder.

I doubt that it is related to your other electrical issue, since it is just two of the four sensors, and the ABS ECU itself is alive.

2o6 · 02-04-2013, 08:45 AM

ABS and Brake lights went off, but ABS remained funny acting for about 5 minutes (until it turned back on) which leads me to believe it wasn't getting proper information for the time ABS "worked".

I checked the ABS ECU connector, looks a little nasty on the outside - I'll just have to look it later; I had to run to school.

2o6 · 02-04-2013, 10:31 PM

Checked, cleaned and greased the rear sensors. Both had some blue corrosion.

Lights off, back to normal. Maybe it was just a coicidence that they both threw codes. Will defenitely keep an eye out for the next few days.

02-04-2013, 08:45 AM	#4
2o6 Drives: 2007 Liftback Join Date: Mar 2012 Location: Central Ohio Posts: 164	ABS and Brake lights went off, but ABS remained funny acting for about 5 minutes (until it turned back on) which leads me to believe it wasn't getting proper information for the time ABS "worked". I checked the ABS ECU connector, looks a little nasty on the outside - I'll just have to look it later; I had to run to school.

02-04-2013, 10:31 PM	#5
2o6 Drives: 2007 Liftback Join Date: Mar 2012 Location: Central Ohio Posts: 164	Checked, cleaned and greased the rear sensors. Both had some blue corrosion. Lights off, back to normal. Maybe it was just a coicidence that they both threw codes. Will defenitely keep an eye out for the next few days.