ABS light

[99ToyoRunner]

My abs light has been on for some time now and I can't seem to get it to go off. I checked the fluid and the to see if there was any damage to the speed sensors or the lines and I didn't see anything unusual. The light came on after my rear shocks were installed right after I bought my truck. When I bought my truck the ABS light wasn't on. Anyway is there a scanner that can read ABS codes? I just want to fix this problem. Other than that my 4Runner has been awesome. I've put over 3k on her since I picked her up in April. Thanks! btw my car has 161k and it's a 3.4 5speed

 

[davidch]

You may be able to solve the problem without going to the trouble of extracting a diagnostic code: examine the wires leading to each rear wheel's ABS sensor. Possible one or both got damaged during shock installation. The wires and the just barely accessible top shock nuts are very close. Easy to damage the wires by a ham-fisted installer.

If you'd still like to extract the ABS error code, there's a video on YouTube that explain how it's done. Also several text explanations out there on the Internet. You jumper two pins on the diagnostic connector attached to the intake plenum, turn the key on but don't start the engine, and count the pulses that the ASB warning light makes.

 

[99ToyoRunner]

Okay I will look at this after work...Second question I failed to ask I noticed my A/c wasn't working and I checked the system pressure and it seemed to hold the pressure so I was a bit stumped. I noticed that there wasn't a belt on the a/c compressor so I bought a new a/c belt and then realized that the bolt to adjust the tensioner is stripped and also a bit rusty. Has anyone else encountered this problem?

 

[MStudt]

Okay I will look at this after work...Second question I failed to ask I noticed my A/c wasn't working and I checked the system pressure and it seemed to hold the pressure so I was a bit stumped. I noticed that there wasn't a belt on the a/c compressor so I bought a new a/c belt and then realized that the bolt to adjust the tensioner is stripped and also a bit rusty. Has anyone else encountered this problem?

Most likely had a leak to cause the bolt to get rusty. The previous owner most likely f'ed it up trying to get it out, and then let it be once they found out. Most likely the reason why there was no belt on it in the first. You can always CAREFULLY install a helicoil, and it'll be a good as new. I would also check to make sure your ABS fuse isn't blown, and check the speed sensor. I'm betting on the speed sensor though.

 

[Brian757]

My abs light has been on for some time now and I can't seem to get it to go off. I checked the fluid and the to see if there was any damage to the speed sensors or the lines and I didn't see anything unusual. The light came on after my rear shocks were installed right after I bought my truck. When I bought my truck the ABS light wasn't on. Anyway is there a scanner that can read ABS codes? I just want to fix this problem. Other than that my 4Runner has been awesome. I've put over 3k on her since I picked her up in April. Thanks! btw my car has 161k and it's a 3.4 5speed

I would most definitely get a multimeter if you don't have one already. Find each of your ABS wheel speed sensors and locate where they plug to the harness. Unplug the harness and there should be two pins. Attach the positive and negative wires from the multimeter and check the Ohm readings. A bad ABS sensor will show infinite, whereas a good wheel speed sensor is like 1.3-1.7 ohms. I forget exactly what ohm reading, but if it shows you numbers period, its fine. I can almost bet its a wheel speed sensor. Let me know if you need more info on how to do what I posted above.

I replaced my front driver wheel speed sensor a few months ago from giving my truck to a calibration company, and they somehow broke it. I was waiting in the building, paid, and right when I hopped in, I saw the ABS light. I had already signed an agreement that anything broken on my truck is not their fault. So I just took a ABS Sensor off of a donor runner for $15. Brand new, they're about $200.

Okay I will look at this after work...Second question I failed to ask I noticed my A/c wasn't working and I checked the system pressure and it seemed to hold the pressure so I was a bit stumped. I noticed that there wasn't a belt on the a/c compressor so I bought a new a/c belt and then realized that the bolt to adjust the tensioner is stripped and also a bit rusty. Has anyone else encountered this problem?

I would pull the A/C compressor off of the tensioner, and go find a new tensioner off of a donor runner. If the system is pressurized, then all it needs is a belt tightened properly. Or you could save yourself some time and get a "Tap 'N Die" set and just remove the bad bolt, and find a replacement bolt.

 

[99ToyoRunner]

Unfortunately being a New England car...I wasn't able to get the skid plate off because on of the bolts was completely stripped and rusted as well so I couldn't get full access to the bolt for the tensioner. I think it's worth it to try and get the belt on and see if my A/c works...My dad has a multimeter however that's at my parents house in NY and I don't know if anyone I know here in MA has one or if I can rent one from an auto part store. I can almost be certain that it is the rear passenger side speed sensor. When I had my rear shocks installed the mechanic had to cut the old shock with a saw to get it to come out because the top bolt was so rusted. After getting under the truck and looking I didn't notice any wires or cables broken or damaged. I'll check the ABS fuse again...always have to start with the simplest things. Other than this little issue this truck is pretty awesome. -Karl