Question about 1990 Toyota Pickup

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No break pedal after brake job on 1990 Toyota P/U SR5 V6 rear ABS

Replaced rotors, pads and calipers then tried to bleed lines, but no pedal.
Changed 2 M/C but still no pedal. After some research learned about the rear only ABS system on the truck. The rear ABS is operated from a valve hooked up to the P/S pump and regulated from a relay. After more research learned that the ABS system can be bled electronically from the relay plug with a special tool. Tried to purchase tool, but too expansive, $270.00. Called Toyota dealers, and even they have no tool, nor any idea on how to resolve problem ( they know less then I do and said they would have to research the problem before they can give cost on repairs).
I don't want to tow the truck 30 miles just to find out they can't fix it.
Question: ''Is there a way to bleed the system without that special tool?''

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  • 2 more comments 
  • Frank  Castorani
    Frank Castorani Mar 12, 2009

    Yes, but after a gallon of brake fluid still no pedal, it goes straight to the floor on first push then gives a bit of resistance but still no pedal.
    Still researching, and just found out the rear ABS only functional in two wheel drive. Tomorrow will try to see if I get different results in 4 wheel drive.
    Thank you for your response.


  • Frank  Castorani
    Frank Castorani Mar 12, 2009

    Yes to all. I don't get mad, but to better understand me, I've done many many brake jobs (I'm 63 years old so had plenty time to do them LOL). I gravity, vacuum, and pedal pressure bled this truck, and after days of trying I still have no pedal. The problem is not in the bleeding of the lines, but the bleeding of the ABS valve. As I said I'm going to see if in 4 wheel drive it will by pass the valve and get a pedal. Also found out that the ABS light would be on if a bad valve (mine is not) also the valve is connected to the ECU so I will have to check the ECU to see if that is the problem.
    Thank you again for your response.



  • Frank  Castorani
    Frank Castorani Mar 13, 2009

    Thank you for trying.
    Just in case you want to research more try this site:
    www.autoshop101.com/forms/brake10.pdf

    Thanks again


  • Anonymous Apr 10, 2009

    i have the same exact problem gallons of brake fluid no pressure

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  • Master
  • 4,669 Answers

Are you getting fluid to all 4 wheels when you try bleeding it?

Posted on Mar 12, 2009

  • 1 more comment 
  • Clint Smock
    Clint Smock Mar 12, 2009

    Just to check, but the bleeders are pointing up on the front wheels, right. Don't get mad for me asking this. It has rear drum brakes?

  • Clint Smock
    Clint Smock Mar 12, 2009

    It sounds like I don't even have to ask if the rear brake shoes are adjusted up. I can check on shopkey at work tomorrow and see if they show an abs bleeding procedure. Also I'll ask my boss, He worked for Toyota in the 80's

  • Clint Smock
    Clint Smock Mar 12, 2009

    I didn't find much. I did find that if there is no power steering pressure to the actuator the ABS is bypassed. So if you try bleeding and test driving, try it with the p/s belt off. Also (you likely already did this many times) double check everything. I seen no pedal after brake jobs from calipers on crooked or the springs out of place.

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