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- Toyota Tacoma ABS Light On When Driving Home<br>Guide to diagnose trouble and recommended solutions.
Blinking ABS light (searched)
#1
Blinking ABS light (searched)
Hey guys, yesturday after I installed my hood protector (thanks to Gerone @ trdparts4u.com) I started my truck to pull it into the garage and I noticed the ABS blinking. (didn't have time to mess with it till today)
Today I drove my truck to work (about 5 mi.) = no light.
Just went home for lunch = no light. Searched web over lunch for possible causes
Driving back to work = light blinks, only for first 1 mile. Starts blinking again after I stop @ a light then turns off after I start moving again....
Here's what I found:
It could possibly be a dirty sensor, but I haven't drove through any water or dirt lately so how could it all the sudden be dirty?
The owners manual says to take truck to the dealership if the light is blinking
And I also found that you can read the ABS light to detect diagnostics codes (if you can find the stupid diagnostics connector).
So finally here are the questions...
1. I have a full warranty still. should I just take it in?
2. Does my truck even have a ABS diagnostics connector? 2.a If yes, please explain where.
3. Where can I find the code glossary for my truck?
Thank you for your time!
Today I drove my truck to work (about 5 mi.) = no light.
Just went home for lunch = no light. Searched web over lunch for possible causes
Driving back to work = light blinks, only for first 1 mile. Starts blinking again after I stop @ a light then turns off after I start moving again....
Here's what I found:
It could possibly be a dirty sensor, but I haven't drove through any water or dirt lately so how could it all the sudden be dirty?
The owners manual says to take truck to the dealership if the light is blinking
And I also found that you can read the ABS light to detect diagnostics codes (if you can find the stupid diagnostics connector).
So finally here are the questions...
1. I have a full warranty still. should I just take it in?
2. Does my truck even have a ABS diagnostics connector? 2.a If yes, please explain where.
3. Where can I find the code glossary for my truck?
Thank you for your time!
#2
ABS is complicated. Mine went out 6 months ago when I did my lift and I still haven't fixed it. Just pulled my ABS CPU plug and truck runs like normal w/o. Check this post out:
https://www.yotatech.com/50371738-post5.html
Pull the code and google/repost.
https://www.yotatech.com/50371738-post5.html
Pull the code and google/repost.
#3
ok thanks ac808m,
I have to wait till later to check it out but I'll try to find the connector again and pull the code. Can anyone show me a picture of where exactly it is? Thanks everyone!
I have to wait till later to check it out but I'll try to find the connector again and pull the code. Can anyone show me a picture of where exactly it is? Thanks everyone!
#5
I called and told my dealership I'm bringing it in tomorrow. I have to leave it all day... I sure hope they be careful with my baby. I always worry when I drop my truck off because I'm afraid they're going to do more damage and then cover it temporarily... If I can check the code tonight I'll figure out what's wrong and then I can go in there with some understanding of whats wrong. 
Thank you!

Thank you!
#6
Here's what I found
Hey can someone with a 2003 (or close to) Tacoma check under their hood and see if they have this little "diagnostics plug" as shown in figure 13 
Just in case that image is to small heres a link (can you tell how depserate I'm getting) Please
!
click for larger image

Just in case that image is to small heres a link (can you tell how depserate I'm getting) Please
!click for larger image
#7
Contributing Member
Joined: Dec 2003
Posts: 3,659
Likes: 0
From: Between a rock and a hard place, AZ
I just checked my 03, Joe, and I don't have one there.
I believe ours are in the cab, under the dash on the right side. At least, I think that's what it is. I can't imagine what else it would be.
I believe ours are in the cab, under the dash on the right side. At least, I think that's what it is. I can't imagine what else it would be.
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#9
Did I find it?
Ok guys I was checking out Customtacos.com and I kinda put some pieces together and found this. Tell me what you think. (here it goes)
This clip from a TSM shows that I should have the diagnostic plug on the engine. But I don't, so I dug a little deeper..
This page tells me how to do the test, note that it says:
(b) In case of not using hand–held tester:
Check the DTC.
(1) Using SST, connect terminals Tc and CG of DLC3.
SST 09843–18020 or 09843–18040
(2) Turn the ignition switch ON.
(3) Read the DTC from the ABS warning light on the
combination meter.

and the next page shows me where the DLC3 plug is (under the dash, above the gas pedal)

So in conclusion I think CJ (Tacoclimber) is exactly right. My diagnostics plug to "connect terminals Tc and CG" is my OBD II plug.
Does any of this make sence?
This clip from a TSM shows that I should have the diagnostic plug on the engine. But I don't, so I dug a little deeper..
This page tells me how to do the test, note that it says:
(b) In case of not using hand–held tester:
Check the DTC.
(1) Using SST, connect terminals Tc and CG of DLC3.
SST 09843–18020 or 09843–18040
(2) Turn the ignition switch ON.
(3) Read the DTC from the ABS warning light on the
combination meter.

and the next page shows me where the DLC3 plug is (under the dash, above the gas pedal)

So in conclusion I think CJ (Tacoclimber) is exactly right. My diagnostics plug to "connect terminals Tc and CG" is my OBD II plug.
Does any of this make sence?
#10
Contributing Member
Joined: Dec 2003
Posts: 3,659
Likes: 0
From: Between a rock and a hard place, AZ
I lost you at CustomTacos... 
Naw, I think you're on it. I seriously looked all over the intake plenum and I didn't see anything that remotely resembled a diagnostic port. I really think that it is the OBD II. They may have moved a few things around during the nine year run of the 3.4 Tacomas...

Naw, I think you're on it. I seriously looked all over the intake plenum and I didn't see anything that remotely resembled a diagnostic port. I really think that it is the OBD II. They may have moved a few things around during the nine year run of the 3.4 Tacomas...
#11
I lost you at CustomTacos... 
Naw, I think you're on it. I seriously looked all over the intake plenum and I didn't see anything that remotely resembled a diagnostic port. I really think that it is the OBD II. They may have moved a few things around during the nine year run of the 3.4 Tacomas...

Naw, I think you're on it. I seriously looked all over the intake plenum and I didn't see anything that remotely resembled a diagnostic port. I really think that it is the OBD II. They may have moved a few things around during the nine year run of the 3.4 Tacomas...
#12
Contributing Member
Joined: Dec 2003
Posts: 3,659
Likes: 0
From: Between a rock and a hard place, AZ
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Is the OBD II plug the only "diagnostic plug" on Tacos?

