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car stopped running, 4 codes pulled

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by JC91006, Jan 8, 2014.

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  1. JC91006

    JC91006 Senior Member

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    Can anybody direct me to a write up on replacing the brake switch? I think I can get that task done. Then we'll have a clearer picture of what is needed when the car starts.

    Oh I just realized there is no power steering either.....No ICE, no power steering.
     
    #41 JC91006, Jan 9, 2014
  2. Britprius

    Britprius Senior Member

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    The power steering should work in ignition on mode (two pushes of the start button) as it is electric, not engine driven. The diagram shows the supply to it is there in "on" or "start".

    John (Britprius)
     
    #42 Britprius, Jan 9, 2014
  3. JC91006

    JC91006 Senior Member

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    tried it again, press the start button twice. no power steering, very stiff wheel
     
    #43 JC91006, Jan 9, 2014
  4. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

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    Now I'm starting to suspect the 12V battery being weak.
     
    #44 usnavystgc, Jan 9, 2014
  5. JC91006

    JC91006 Senior Member

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    I just looked into the 12v myself, the negative lead is corroded. Very strange. It is measuring 12.3 volts right now. I'll hook it up to my charger for the next few hours and see.
     
    #45 JC91006, Jan 9, 2014
  6. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

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    Clean all the corrosion off too.
     
    #46 usnavystgc, Jan 9, 2014
  7. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

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    12.3 is fine but if there is high resistance (due to corrosion), the 12.3V will never get to where it needs to go.
     
    #47 usnavystgc, Jan 9, 2014
  8. Britprius

    Britprius Senior Member

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    Must admit I have not tried this, but looking at the circuit again it may need some input via the data lines from another ECU. See below.


    Electronic Power Steering.jpg

    John (Britprius)
     
    #48 Britprius, Jan 9, 2014
  9. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

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    Yeah, who knows what it takes to get the pwr strg motor running but, JC could go to IG ON on his good 06 or 08 and see what that one does for pwr strg.
     
    #49 usnavystgc, Jan 9, 2014
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  10. Britprius

    Britprius Senior Member

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    Well thought out. Stop making me look dumb.(n)

    John (Britprius)
     
    #50 Britprius, Jan 9, 2014
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  11. JC91006

    JC91006 Senior Member

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    tried on 06, no power steering when pressing start button twice.
     
    #51 JC91006, Jan 9, 2014
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  12. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

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    Back to the brake light switch.
     
    #52 usnavystgc, Jan 9, 2014
  13. JC91006

    JC91006 Senior Member

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    I'm trying to find a brake switch on Amazon (I normally buy OEM) but they only have switches for w/o cruise control. would that matter?

    This car seems to either a package 3 or 4 with leather and fog lights.
     
    #53 JC91006, Jan 9, 2014
  14. Britprius

    Britprius Senior Member

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    I agree.

    John (Britprius)
     
    #54 Britprius, Jan 9, 2014
  15. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

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    If the car has cruise, you have to get one with cruise but honestly, the switch likely just needs adjustment. They don't go bad often.

    If you have a multimeter, you can test it or you can manually activate it and see if the car starts. You'll have to hold both switches in (there are two contacts)
     
    #55 usnavystgc, Jan 9, 2014
  16. JC91006

    JC91006 Senior Member

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    I looked under the brake pedal and the switch looks to be operating properly. Engaging and Disengaging. I would suspect it's bad.
     
    #56 JC91006, Jan 9, 2014
  17. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

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    Both sets of contacts? We already know one set does work (because it shifts)
     
    #57 usnavystgc, Jan 9, 2014
  18. JC91006

    JC91006 Senior Member

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    I wasn't aware there are 2 contacts. I looked at the contact where the brake pedal comes back and rests on.
     
    #58 JC91006, Jan 9, 2014
  19. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

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    Thats the diff between w/ and w/o cruise. w/o cruise will only have one set of contacts.
     
    #59 usnavystgc, Jan 9, 2014
  20. Britprius

    Britprius Senior Member

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    I think it does need a 2 pole switch. It is difficult to tell from the circuit diagram as it covers 5 pages and operates a number of ECU's, but there is one normally closed set of contacts and one normally open. The normally open has a blue and black wire going to it's terminals. connecting these together and removing the connector to the other set of terminals (green and orange) should give the same result as operating the pedal.

    John (Britprius)
     
    #60 Britprius, Jan 9, 2014
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