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Toyota DTC C1377 Question

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by balmeral, Feb 15, 2015.

  1. balmeral

    balmeral Junior Member

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    I recently changed the front brakes on my gen 2 prius. After I was done and started the car I got the trouble code C1377. I think it has to do with the Brake Control Power Supply. I can find a used part on eBay for between $75 and $100. I was wondering if anyone had any suggestions on things I should test before attempting to replace the BCPS unit. Thanks!
     
    #1 balmeral, Feb 15, 2015
  2. valde3

    valde3 Senior Member

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    Try to just reset the car by disconnecting 12V battery. Test 12V battery. How did you disable brakes while changing the pads?

    Check the connectors between battery and BCPS. Check battery ground wire connections. Check fault code sub code. Check abs fuses.
     
    #2 valde3, Feb 16, 2015
    Last edited: Feb 16, 2015
  3. Britprius

    Britprius Senior Member

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    It is not uncommon to get a brake code after working on the brakes. However I am not sure brake codes can be cleared by disconnecting the 12 volt battery "worth a try". You may need to use a scanner or the method shorting two pins (4 and 13) on the OBD connector. Do a search on clearing code via OBD.

    The code is for the capacitor block "the black box near the battery in the rear of the car" so if you disconnected the battery as you should when doing the work you may have disturbed the connector to the capacitors.

    The capacitor block is very reliable, and it seems very unlikely that a fault in it would be caused by working on the brakes "other than by disturbing the wiring.

    John (Britprius)
     
    #3 Britprius, Feb 16, 2015
    Last edited: Feb 16, 2015
    Patrick Wong likes this.
  4. balmeral

    balmeral Junior Member

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    Britprius,

    I saw a post where you recommended the Mini VCI cable with Techstream. I just got it installed yesterday. How can I clear the code with this software and what should I do if it comes back?
     
    #4 balmeral, Feb 16, 2015
  5. balmeral

    balmeral Junior Member

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    I disabled the battery by disconnecting the negative terminal and removing the two blue ABS fuses.
     
    #5 balmeral, Feb 16, 2015
  6. Britprius

    Britprius Senior Member

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    If you run Techstream it will show the fault code. On the same screen you will see a button with an eraser Symbol. click on that button to remove the code.
    Check to see that you have not disturbed any connectors to the black box by the 12 volt battery.

    John (Britprius)
     
    #6 Britprius, Feb 16, 2015
  7. khan

    khan New Member

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    was your yellow brake warning light turned on??
     
    #7 khan, Apr 18, 2015
  8. Brian smith

    Brian smith New Member

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    How do you check if you have disturb the wiring or anything with the capacitor ?
     
    #8 Brian smith, Nov 8, 2016
  9. valde3

    valde3 Senior Member

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    Just look at the wiring and connectors. Maybe even unplug the connectors and plug them back in if they look suspicious.
     
    #9 valde3, Nov 8, 2016
  10. salguod

    salguod Member

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    Hello, I'm curious if and how you resolved this as I'm getting the same error on my 2007. No recent brake work and pads still have a lot of life left. 12v battery was new about a year ago or more.
     
    #10 salguod, Jan 8, 2017
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