zf freedom line transmission problem

Discussion in 'Volvo Forum' started by rudolph, Dec 27, 2014.

  1. rudolph

    rudolph Bobtail Member

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    Dec 20, 2014
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    Hi everyone! I have 06 Volvo ed12 with 12 spd zf freedom transmission. After washing engine experienced many problems. First SM appeared on display then after shutting down, engine would not start.I managed to start engine using solenoid.but could not shift with out problems, SM would reappear . Couple days later lost all electrical power to transmission . No power on the sifter and two lines on display. Replaced voltage doubler ,now I have electrical power to shifter but can not put transmission into gear SM beeps . I have following active codes mid128 pid 27 fmi5, mid128 pid84 fmi9,mid128 sid 231 fmi2, SEA J1939 link data irratic and mid144 but nothing more with this one. I do not have diagnostics tool , trying to find out if someone else have had similar problem and what to look for. Thanks
     
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  3. baha

    baha Road Train Member

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    Was the speedo acting funny, hand moving not holding steady at speed?
     
  4. rudolph

    rudolph Bobtail Member

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    Dec 20, 2014
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    Nothing wrong with speedo. I am trying to find out if problem is with transmission or elsewhere.I was claiming hill when I lost electrical power to transmission.
     
  5. baha

    baha Road Train Member

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    If you look inside batt. box for the small set of wires that have a push in fuse from pos. + an - sides of batt. they should run 12v. to trans. not sure how your 06 is set up but if not in batt. box look in fuse panel at big 12v. studs that main power runs into fuse box for trans power?
     
  6. ahab

    ahab Light Load Member

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    May 21, 2014
    essex ontario
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    My 2005 did that -leaving stoplight bobtail very rough road- in 11th got the beep and SM message(stayed in 11 did not shift),I did not know it meant service module ,thought it meant 'select manual':biggrin_25524: so I did and rocked the shifter and got 12th.
    No more issues for the next 700 miles ,but took it in to volvo just incase,tech said they instruct fleet mechanics to clean every connection to and from the batts every 30 days.Found the wires from the voltage doubler lose (came off in his hand).
    I clean mine every year.
    all the posts and the bars and little wires that run from the batts (goofy set up )

    Try it its free
     
  7. rudolph

    rudolph Bobtail Member

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    Dec 20, 2014
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    I am checking wires and trying to get sense of those faulty codes, Fuses are fine I do have electrical power to shifter but looks like I entered some derate mode since I can not rev rpm past 1700. Thanks
     
  8. ahab

    ahab Light Load Member

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    May 21, 2014
    essex ontario
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    Disconnect the battery bank for a few and see if it resets?
    Do all the cheap stuff first ,but you may have a XYZ shifter issue, how is the air pressure? mine needs 90 psi minimum
     
  9. rudolph

    rudolph Bobtail Member

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    Dec 20, 2014
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    I did I checked voltage to TCU , air pressure is fine shifter shown N but I do have vehicle speed sensor code and J1939 link issues. I am trying to make sense of that. Thanks
     
  10. baha

    baha Road Train Member

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    Speed sen. is on tail of trans. speedo will wiggle a bit at speed when they go bad, bolt or torx then pry it out and take it with you to parts store and buy new part
     
  11. rudolph

    rudolph Bobtail Member

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    Dec 20, 2014
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    Sure I would if that would solve all problems and I have two of those. Thanks
     
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