ABS Light on
- Thread starter Erich_121
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20034RunnerV84x2
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He didn't say anything about a CEL. A bad gas cap would cause a CEL. I have more of a feeling it's his Yaw Rate Sensor, but those rarely go bad.
08t4rlimited
New member
do they all stay in constantly??
BlackWorksInc
New member
I love how everyone's automatic response to any ABS/VSC/TRAC and/or MIL thread is "Its the gas cap!"
Not because its entirely untrue, just that it makes me chuckle to think of how many people forget to tighten their gas cap and/or forget how DTC's are stored/presented on the 4Runners.
Simply put; Toyota does this on their Vans, SUV's, Trucks, and some of the CUV's:
MIL w/ ABS,Trac, VSC lights indicate a DTC stored in the PCM, and/or a fault in the vehicle that affects the emissions as in accordance with OBD-II regulations; anything after that is just Toyota being nice.
ABS/VSC/Trac lights w/o MIl indicate a fault in the ABS/VSC/Trac systems and a code stored in the ABS/VSC module.
The "manual" method of obtaining the ABS codes goes back to the OBD-I days of diagnostics of jumper wires and blinking lights. That being said, the codes are actually "C" codes, the manual method just converts the 4 digit C-codes into 2 digit ABS Fault codes.
Unfortunately I don't have access to TIS since I am at home (IP locked service like ALLData... I will have to find a way to spoof the IP so I can remotely log in to TIS as this gets annoying...) so I can't pull up the code chart for you at the moment. I think you can download the Factory Service Manual from a Sticky on the 4th Gen section.
Edit-
Found a Toyota ABS DTC chart, should be close enough for this application.
http://www.docstoc.com/docs/36351144/DIAGNOSTIC-TROUBLE-CODE-CHART---PDF
Code 32 is a C0205- Left Front Wheel Speed Sensor Signal Malfunction
Code 36 is a C1236- Foreign Matter Is Attached To The Left Front Wheel Speed Sensor Tip
Basically the system is saying there's crap on your wheel speed sensor. Check the tone ring and clean off the tip of the wheel speed sensor and while you're at it check for a leaking CV axle. The grease can sling off onto the tone wheel or sensor and collect ferrous particulates that will mess with the signal.
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BlackWorksInc
New member
Get the old sensor out and replace it with a new one. You already broke it so might as well did what's left out and pop a new one in.
BlackWorksInc
New member
If I remember right, they just bolt into the hub? Shouldn't have been that hard to get it out.
BlackWorksInc
New member
Seems the 4Runner thought it had an issue and then decided it didn't... did you see if there's a pending/history code to go off of? I would assume either a loose connection or the ABS just having a hiccup.
earthrealm
Senior Member
these sensors.they hv a known lifespan?
earthrealm
Senior Member
ur sensor might be dirty..i suggest you take it out and wipe thoroughly with a good cleaner
I just replaced the old sensor with a new one, being dirty seems unlikely. I did notice that the abs light does not come on when driving on the interstate, usually it comes on when slowing down and making turns. It will turn off after a while, then back on again.
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Should the wheel speed tone ring attached to the hub be visible through the wheel speed sensor hole?
Ie. should I see a metal toothed ring that rotates with the wheel though the sensor hole when the sensor is removed?
My dash has ABS/VSC/Trac lights w/o MIl, ABS DTC 31, VSC 51 and 43.
Replaced the front right sensor that broke off trying to check it out like OP. There's no toothed ring inside. Just a polished aluminum cylinder that rotates with the wheel.
Ie. should I see a metal toothed ring that rotates with the wheel though the sensor hole when the sensor is removed?
My dash has ABS/VSC/Trac lights w/o MIl, ABS DTC 31, VSC 51 and 43.
Replaced the front right sensor that broke off trying to check it out like OP. There's no toothed ring inside. Just a polished aluminum cylinder that rotates with the wheel.
