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06 prius hybrid battery pack problem

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Parrish21r, May 25, 2016.

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  1. Parrish21r

    Parrish21r Junior Member

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    i recently had a cell go bad. i replaced the cell and then balanced it out using a dc6 charger. it's a gen2 battery pack with 28 cells. the pack is currently reading 230v output at terminals and the car says battery is fully charged. after about 10 min of driving triangle pops up again. any clues or tips on what to do from here? all cells are currently 8.0-8.1

    Posted via the PriusChat mobile app.
     
    #1 Parrish21r, May 25, 2016
  2. JC91006

    JC91006 Senior Member

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    You should check the codes in the car, maybe the triangle is not related to your battery.
     
    #2 JC91006, May 25, 2016
  3. Parrish21r

    Parrish21r Junior Member

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    the codes were high voltage, loss communication to ecu. I checked the plugs and wires everything is fine. i can hear like a solenoid clicking multiple times before the car says ready then another click when the triangle comes back on. does the hybrid battery cut off at a certain voltage?

    Posted via the PriusChat mobile app.
     
    #3 Parrish21r, May 25, 2016
  4. jadziasman

    jadziasman Prius owner emeritus

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    There's a possibility that the HV voltage is too high and is causing the DTC. If you read the codes
    you'd already know that.
     
    #4 jadziasman, May 25, 2016
  5. Parrish21r

    Parrish21r Junior Member

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    yea that's what i thought but i pulled the battery and balanced it out but it's still just doing the same thing. how can i lower the voltage?

    Posted via the PriusChat mobile app.
     
    #5 Parrish21r, May 25, 2016
  6. JC91006

    JC91006 Senior Member

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    The voltage of the module you installed is too high?
     
    #6 JC91006, May 25, 2016
  7. Parrish21r

    Parrish21r Junior Member

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    they were all equal when installed and are still equal. but all cells are at 8.1 right now. I dropped them to 7.5 reinstalled and it done the same thing within minutes

    Posted via the PriusChat mobile app.
     
    #7 Parrish21r, May 25, 2016
  8. jadziasman

    jadziasman Prius owner emeritus

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    Without the DTC codes you're blind. Go to Harbor Freight at 2821 Reeves St - hwy 431. and get a code reader.
     
    #8 jadziasman, May 25, 2016
  9. Parrish21r

    Parrish21r Junior Member

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    i have a code reader. that's what i was saying the codes are just say loss communication and too much voltage. here in a bit I'll upload the codes.

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    #9 Parrish21r, May 25, 2016
  10. ericbecky

    ericbecky Hybrid Battery Hero

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    You can do something as simple as hook a light bulb up...CAREFULLY AND SAFELY..... to drain the pack.
     
    #10 ericbecky, May 25, 2016
  11. jadziasman

    jadziasman Prius owner emeritus

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    My mistake. Appy polly lodgies.
     
    #11 jadziasman, May 25, 2016
  12. S Keith

    S Keith Senior Member

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    Sorry I was late to this one. Didn't have access until now.

    Give us the exact code. Do not interpret it.

    The idea that the pack voltage is too high is not possible.

    He may have a break in the sensing wire harness causing the previous block to read 20V and the following block to read 0V.

    Again, give us the EXACT code reported.
     
    #12 S Keith, May 25, 2016
  13. Parrish21r

    Parrish21r Junior Member

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    as soon as i get off in the morning I'll upload the codes so you guys can see.

    Posted via the PriusChat mobile app.
     
    #13 Parrish21r, May 26, 2016
  14. JC91006

    JC91006 Senior Member

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    Did you replace only 1 module or did you replace the entire block that was bad? Some modules only test bad under load.
     
    #14 JC91006, May 26, 2016
  15. Parrish21r

    Parrish21r Junior Member

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    i only replaced the bad module. i tested them multiple times including in the car as the triangle came on. only one other module which is module 28 in my pack was suspicious but after balancing on the dc6 charger it hasn't went back down. what volts should the pack have been put back in the cat at bc i put them back in the car at 7.5v and within about 10 min they were back up to 8.1. aslo the traction control button below the steering wheel isn't working.

    Posted via the PriusChat mobile app.
     
    #15 Parrish21r, May 26, 2016
  16. S Keith

    S Keith Senior Member

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    Codes?
     
    #16 S Keith, May 26, 2016
  17. Parrish21r

    Parrish21r Junior Member

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    #17 Parrish21r, May 26, 2016
  18. ericbecky

    ericbecky Hybrid Battery Hero

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    U029A Lost Communication with Hybrid Battery Pack Sensor Module
    P0A9E Hybrid Battery Temperature Sensor "A" Circuit High
    P3019 Battery Block 9 Becomes Weak
    P3023 Battery Block 13 Becomes Weak
    P0AC2 Hybrid Battery Pack Current Sensor 'A' Circuit High
    P0560 System Voltage
    POA0D Service Plug Installation issue
    U0100 Lost Communication With ECM/PCM ”A”
     
    #18 ericbecky, May 26, 2016
    Robert Holt likes this.
  19. Parrish21r

    Parrish21r Junior Member

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    yes i reset the codes and only block 13 came back week after balancing it went away now just the remaining codes. I'm at at loss now.

    Posted via the PriusChat mobile app.
     
    #19 Parrish21r, May 26, 2016
  20. ericbecky

    ericbecky Hybrid Battery Hero

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    So you need to look carefully at the wiring for that block.
    Then also aggressively, individually test each of the two modules in that block. Including a load test.
     
    #20 ericbecky, May 26, 2016
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