ABS and other bulbs are on

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by TharakaD, Jul 9, 2015.

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  1. TharakaD

    TharakaD Member

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    Thanks Patrick
    I'll have a look at it.. :)
     
    #21 TharakaD, Jul 31, 2015
  2. TharakaD

    TharakaD Member

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    Thanks Patrick
    This is my third reply, doesn't get posted here.

    Anyway do you think first I should check ABS Fuses.

    I recall there's a. 30-30-40 joint together fuse, seems like lose.

    Do you know, what you call it. So I can replace it first and see
     
    #22 TharakaD, Aug 1, 2015
  3. Patrick Wong

    Patrick Wong DIY Enthusiast

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    You can check whatever you feel like. However I doubt that a fuse is the issue. If a blown fuse was the issue then you would not be able to drive the car for any length of time without the warning lights being on.

    Your car's problem is not going to be easy to resolve, you will need to troubleshoot the wiring harness.
     
    #23 Patrick Wong, Aug 1, 2015
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  4. TharakaD

    TharakaD Member

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    Ok got the point. I could not access above link you gave me. I'll have to search web a little bit more.

    Anyways thanks for the reply...
     
    #24 TharakaD, Aug 1, 2015
  5. TharakaD

    TharakaD Member

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    I
    I was referring to a lose fuse, not a blown fuse..

    When I reset lights its operating fine. Then those will come back on in about 20 minutes, does that mean anything??

    May be it's verifying something in this area each 20 minutes.

    With that can we reduce the scope in combing through wiring diagram. May be to some specific areas...
     
    #25 TharakaD, Aug 2, 2015
  6. Patrick Wong

    Patrick Wong DIY Enthusiast

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    You can try removing and reseating fuses if you believe that a loose fuse is the problem. After you have finished that effort, and found there is no improvement, then you can try what I earlier suggested.

    Last Thursday in post #18, you posted a file showing that the car logged DTC U0129. Look up that DTC in the factory repair manual that you can find in techinfo, and it will provide you with a very detailed troubleshooting path to follow.

    My post #19 above provided the Toyota Europe techinfo website link. If you are currently in the US you can try the TMS USA techinfo website: techinfo.toyota.com
     
    #26 Patrick Wong, Aug 2, 2015
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  7. TharakaD

    TharakaD Member

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    Hi Patrick
    I got following items ( message from techinfo)
    But couldn't go further. It's asking my password.

    Even after registering and entering password it doesn't work.

    I'm I on the right path..
     

    Attached Files:

    #27 TharakaD, Aug 2, 2015
  8. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Well, I think you are on the right path. I assume that you purchased a subscription? If so, then I suggest you send an email to [email protected] to complain about your lack of access to the website.
     
    #28 Patrick Wong, Aug 2, 2015
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  9. TharakaD

    TharakaD Member

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    So many difficulties one after another.
    May be I'm not having a very good time..

    Will Keep on trying..

    Thanks
     
    #29 TharakaD, Aug 2, 2015
  10. bisco

    bisco cookie crumbler

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    all the best tharaka!(y)
     
    #30 bisco, Aug 2, 2015
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  11. TharakaD

    TharakaD Member

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    I needed that support Bisco..
    Thank you.... !!!
     
    #31 TharakaD, Aug 3, 2015
  12. TharakaD

    TharakaD Member

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    hi
    got some info, it has to be
    CAN communication system or Skid control ECU.
    Since i had an earlier issue with VSC light coming on, i think it has to be skid control ECU.

    But beyond that.. could not find more. the repair manual does not have specific instructions given for U0129.

    closer available is U0110-160 [Lost Communication with Driver Motor Control Module], which is not my issue.
    this document has 1001 pages. wondering how to proceed.

    guys pls help.. I'm sure you have used this manual many times
     
    #32 TharakaD, Aug 3, 2015
  13. Patrick Wong

    Patrick Wong DIY Enthusiast

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    I was hoping that you could find DTC U0129 because the troubleshooting path indicates that you would remove a wiring harness connector from the skid control ECU and measure resistance across two pins, A58-35 and A58-34. If the resistance measurement is 54 to 69 ohms (which verifies the wiring harness is good to the ECM and to the Power Management Control ECU) then the manual advises replacing the skid control ECU which is integrated with the brake actuator, hence the entire assembly must be replaced.

    You need the picture of the connector to find those two pins, hopefully you can find that now. Look in the Power Source/Network section of the manual.
     
    #33 Patrick Wong, Aug 3, 2015
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  14. TharakaD

    TharakaD Member

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    Thanks Patrick.
    I remember going through such reading

    Found it. But could not get exact placement of skid control ECU.

    Have to look up. Should be either below cubby hole or steering wheel

    Need to look that up, because its right hand drive
     

    Attached Files:

    #34 TharakaD, Aug 3, 2015
  15. TharakaD

    TharakaD Member

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    Hi Patrick
    Can it be brake stroke sensor
    It's cheaper to replace.

    And I have pushed brake extra hard. When my brake light fuse blown. Actually most of these issues started thereafter
     
    #35 TharakaD, Aug 3, 2015
  16. TharakaD

    TharakaD Member

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    Because in many cases it has been the case. Including your case in 2008
     
    #36 TharakaD, Aug 3, 2015
  17. Patrick Wong

    Patrick Wong DIY Enthusiast

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    I believe you will find the skid control ECU is located on the firewall. It is part of the brake actuator, so you'll see several brake hydraulic lines running to it. You would need to remove the cowl tray (which contains the windshield wiper motor) that runs across the firewall for access.
    I don't think so because your logged DTC has to do with a communications problem.
     
    #37 Patrick Wong, Aug 3, 2015
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  18. TharakaD

    TharakaD Member

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    hi Patrick,
    i heard this unusual sound near brake pedal

    https://app.box.com/s/96c4nwvmogphg6hugz0t9pft4qendebf

    recorded it behind the traffic light
    my bulbs were reset at this time. and i was on "D" with brake in traffic red light.
    with the click sound there was a push from the brake pedal to my foot
     
    #38 TharakaD, Aug 5, 2015
  19. TharakaD

    TharakaD Member

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    I was trying to locate the skid control ECU yesterday night not successful
    im in a rush since will be flying back to US Friday evening after work. and have a meeting thursday till late. wednesday [today] is my 2yr sons birthday in evening

    located brake actuator do you think its below that. so i will hve to remove brake actuator first?
     

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    #39 TharakaD, Aug 5, 2015
  20. TharakaD

    TharakaD Member

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    there was an unused wire clip also near the brake actuator,
    hope there are no issues with the above sound..

    pls help me to locate the skid control ECU
     

    Attached Files:

    #40 TharakaD, Aug 5, 2015
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