http://www.aboutautomobile.com/TSB/2001/Toyota/Avalon/Anti-Lock+Braking+System+(ABS)

This is a TSB for the Avalon, but it seems related to your problem.

 

The link doesn't work. I found the TSB though for the 2001 Avalon (TSB Number 344). What should I do in regards to this TSB? What is the solution?

 

Try to obtain the TSB. Ask about it in the Avalon forum. Two codes are identical to yours.

 

https://www.autocodes.com/uploads/toyota/EG013-03.pdf

https://www.autocodes.com/uploads/toyota/EG007-05.pdf

 

Hey guys so I checked the Abs sensors yesterday. The front abs sensors were full of metal deposits. The right one had 3 × deposit of the left one. I visually checked them and cleaned them very well. I broke the ABS sensor screw when I tried to tighten it. I extracted the broken screw with jaw pliers. I went to buy the screw and secured it. Before I replaced the wheels back on, I noticed that the front brake pads were literally touching the rotors. It required force to turn the front wheel hubs. I checked and saw that the brakes were not applied.
After that I checked the rear abs sensors visually. They are not serviceable since they are part of the wheel hub (glued in to the center.) Afterwards I got the car ready.

I drove 6 miles, not once did the ABS kick in while I drove forward. The second time I drove the car backwards about 10 feet (15 mph), the Abs kicked in very heavily when i applied the brakes. The brake pedal got hard to press, made the buzzing and made ratcheting sound until I brought the car to complete stop. I had to use the emergency brake to stop the car.

Analysis:
1. I think the front ABS sensors are scraping against the teeth of the abs rings.
2. I think the front brake calipers are seized.

The first occurrence of this Abs pulse was when I first went 10 feet in reverse 15 mph and applied the brakes. It happened every time when i drove in reverse (10 feet, 15 mph) ever since. Then after 1 month, it started doing the Abs pulse whenever i drove in drive. It did this more and more, eventually happened every time I applied the brakes when going forward and slowing down to 5 mph.

What do you guys think I should do so that the ABS kicking in always in reverse after travelling 10 feet (15 mph) and applying brakes stop? Also what should I do so that the ABS pulse never comes back while driving forward?

Should I get washers or something for the front ABS sensors so they don't scrape against the teeth of the Abs rings?
Should I check to see that the front brake caliper pins are seized or not? Should I clean and lube them?
Should I check the rear ABS sensors for proper voltage and resistance? What is the numbers I should be looking for if I should do this?

 

Can somebody help me out? I need my car's brakes to work properly.

 

Any advice??

 

Oh thaaat's where Massapequa is. That would explain all your rust problems!

No shims, I would check each ABS sensor - clean the sensors, clean out the bores, and be careful removing them since you have so much rust. I would also take off the rear drums and see if there's anything you can determine visually at the rear brakes.

IIRC the gen1 Sienna did have issues with the ABS computer going bad - but this usually manifests as false TPMS light, false ABS sensor codes, and the pulsating issue. I had that happen on my parents' '02 - sent the computer off to an eBay rebuild service for $250, and it's been working fine ever since. If you flush out the brakes and the wiring checks out to the sensors, I would suspect the ABS ECU.

To properly test ABS sensors, you're going to need an oscilloscope.

 

Okay so i fixed the ABS pulse with ABS code 42. The ABS computer finally gave out a flash code 33(Right rear wheel sensor malfunction). The pulse has not returned since I replaced the rear right wheel speed sensor/ hub assembly with a new unit. Thank you everyone for your input in regards to this problem. :clap: