ABS/Brake lights:

Hello, I’m new here although I believe I was registered 10 or so years ago. Life circumstances sometimes change our priorities without warning. Regardless, I still have my Tacoma and I’m hoping for some help resolving an apparent ABS problem.

The abs/brake lights are lit on my 2007 Tacoma yet my obd2 scanner gives me no related information. This was surprising to me, is it normal for it to show no abs info.?

 

Check for codes and go from there.

First, connect terminal 4 and 13 of the OBD-II socket (under the dash in front of your left knee) with a jumper wire. (Those are the 4th from the left on the top and the fifth from the left on the bottom.)

Turn the ignition to on. You'll notice lots of flashing lights, but just pay attention to the ABS light. Normally, it should be rapidly and steadily flashing, twice per second. If it has stored a trouble code, it will instead be flashing a pattern that will coding a two-digit number. There may be more than one code being flashed out. It will just repeat the code over and over, so you have plenty of time to figure it out and write it (them) down.

NOW you can clear the codes. Just tap the brakes rapidly 8 or more times, about two taps per second. You don't have to jam on the brakes, just tap them enough to blink the brake lights. If you're successful, the ABS light should return to its normal fast blinking. Now remove the jumper wire, and finally turn off the key.

Now when you turn on the key, the ABS light should just do its normal light for three seconds and go off. If it comes back on, you still have a problem

 

Thank you, I’ll try the ASAP.

 

Looking at the connector description I see that pin 4 is chassis ground and pin #13 isn’t connected on my model.

 

Try here for a diagram.
Pins - #4 & #13
https://www.tacomaworld.com/threads...-bad-rear-wheel-bearing.561813/#post-18396971

 

Very good. I must have been looking backwards at the wiring diagram. The code seems to be 3,4. That is: 3 - 4 ——3 - 4 ——

Does this mean a malfunction of the left rear wheel speed indicator?

 

That would indicate a Left Rear Wheel Speed Sensor.

 

Thank you all.

 

It could be the wires to the sensor. Have you been 4 wheeling in the brush lately? Or had it towed on a flatbed lately?

 

No for both questions but I’ll carefully check for wiring problems. Thank you for the advice.

 

I think you can unclip the rear wire harnesses and swap them side to side as a test. Hook the right harness to the left sensor and vice versa. Obviously the ABS won’t work right if you slam on the brakes, but if you do the swap, clear the code, drive it a bit and then check the codes, if the code switches sides, you know it’s the harness and not the sensor.