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Scan tool won't connect to car

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by ruggb, Jan 12, 2013.

  1. ruggb

    ruggb Junior Member

    Joined:
    Jan 4, 2007
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    Location:
    Cary, NC, USA
    Vehicle:
    2007 Prius
    Model:
    N/A
    Last week I connected my scan tool to my 2007 Prius and read/reset DTCs regarding the HV battery.
    I actually did it a couple of times.
    Then I took it to the dealer and they said I needed $3800+ work including a $3200. hv batt.

    I had a hard time dealing with $176. to replace spark plugs so I did it myself in less than 30 min for $28. - $8. rebate. (Just remember to reconnect the right spark plug connector, DUH!!)

    And $231. for an OEM 12v batt. so I got an Yellow top Optima for $175.
    Everything checks out fine.
    Now they get their money's worth with "If it fits, it ships". 2 days across country.

    Anyway, I reconnect the scan tool and it tells me the motor isn't running when it isn't -- good!
    But when I start it it says it can't communicate with the scan tool.

    Moving right over to my Honda Van, I have no problem connecting to it.

    BTW, I tried this before and after replacing the 12v batt and plugs -- same thing.

    What changed? Something the dealer did???
     
    #1 ruggb, Jan 12, 2013
  2. PriusGuy32

    PriusGuy32 Prius Driver Extraordinaire

    Joined:
    Sep 10, 2012
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    Location:
    Harrison Township, Michigan
    Vehicle:
    2015 Prius
    Model:
    Four
    Have you checked the fuse for the OBD2 connector? In most vehicles, its shared with the 12v auxillary (cig lighter) outlet but Im not sure on the Prius.
     
    #2 PriusGuy32, Jan 13, 2013
  3. ruggb

    ruggb Junior Member

    Joined:
    Jan 4, 2007
    67
    12
    0
    Location:
    Cary, NC, USA
    Vehicle:
    2007 Prius
    Model:
    N/A
    separate fuse 7.5A visual OK.
     
    #3 ruggb, Jan 13, 2013
  4. cwerdna

    cwerdna Senior Member

    Joined:
    Sep 4, 2005
    12,544
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    Location:
    SF Bay Area, CA
    Vehicle:
    2006 Prius
    What tool are you using? Is it possible there's some protocol differences between your Honda and Prius? Did connecting it to the Honda put it into a certain mode that needs to be changed back?
     
    #4 cwerdna, Jan 13, 2013
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