2005 volvo ecu

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Zekria99, Jun 15, 2012.

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  1. Jun 15, 2012 #1
    Zekria99

    Zekria99 Light Load Member

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    Nov 25, 2010
    Toronto,Ontario
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    Need help.on this 2005 volvo with cummins and zf merritor 12 speedI dont see any lights on shifter On dash I cant access diagnostic for transmissionI can access the vehicle ecu It says vehicle speed erratic code mid144 pid84 fm12it also reads datalink sae j1939 mid130 communication error mid144 psid205 fm19I checked the battery commection and fuses are good, the dealer is telling me the transmission ecu is no goodI checked power was coming to ecu and also power was coming to voltage doubler.I dont know how to.check for power coming outAnyone know Oh the truck wont startThanks in advance for any help
     
    Zekria99, Jun 15, 2012
    Zekria99, Jun 15, 2012
    #1
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  3. Jun 15, 2012 #2
    Zekria99

    Zekria99 Light Load Member

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    Nov 25, 2010
    Toronto,Ontario
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    If pablo out there please help me on this one or anyone else


    Thanks
     
    Zekria99, Jun 15, 2012
    Zekria99, Jun 15, 2012
    #2
  4. Jun 16, 2012 #3
    chopov78

    chopov78 Light Load Member

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    Feb 27, 2010
    illinois
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    i think you have bad speed sensor,find it and change it.
     
    chopov78, Jun 16, 2012
    chopov78, Jun 16, 2012
    #3
  5. Jun 16, 2012 #4
    chopov78

    chopov78 Light Load Member

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    Feb 27, 2010
    illinois
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    i think you have bad speed sensor,find it and change it.
    It has to be on the transmision box.I had a similar problem a week ago,
     
    chopov78, Jun 16, 2012
    chopov78, Jun 16, 2012
    #4
  7. Jun 16, 2012 #5
    Pablo-UA

    Pablo-UA Road Train Member

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    check for TCU voltage supply. They used European control unit (for 24V truck) and they installed 12 to 24 voltage converter (it is a box on tranny), this voltage converter is a weak point
     
    Pablo-UA, Jun 16, 2012
    Pablo-UA, Jun 16, 2012
    #5
  8. Jun 16, 2012 #6
    Zekria99

    Zekria99 Light Load Member

    75
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    Nov 25, 2010
    Toronto,Ontario
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    I think it is the voltage doubler, I checked the voltage going in at 12.6 v coming out is 0. I am waiting for the part to come, once it is


    . Do they use voltage doubler in manual transmission.
     
    Zekria99, Jun 16, 2012
    Zekria99, Jun 16, 2012
    #6
  9. Jun 16, 2012 #7
    Pablo-UA

    Pablo-UA Road Train Member

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    No, solenoids they use work fine from 9v to 33V. Only with ZF freedom/Astronic.

    Really these voltage doublers are made with old technology, too big, too heavy and not reliable. Now I use voltage convertors from US truck to US trailer EBS power supply conversion kits.
     
    Pablo-UA, Jun 16, 2012
    Pablo-UA, Jun 16, 2012
    #7
  10. Jun 19, 2012 #8
    Zekria99

    Zekria99 Light Load Member

    75
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    Nov 25, 2010
    Toronto,Ontario
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    Thanks for the help Pablo, it was the voltage double, the dealer wanted to put the ecm first, then voltage double, I told him to put the voltage doubler first, as they put it, i turned the key on and there I had power to transmission and saved 1200 on the ecm that was not needed. The speed sensor use 24 volts, as well, so that was why the vehicle ecm was giving me the code, for the speed sensor.

    Thanks everyone and this forum.
     
    Zekria99, Jun 19, 2012
    Zekria99, Jun 19, 2012
    #8
  11. Jun 19, 2012 #9
    Pablo-UA

    Pablo-UA Road Train Member

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    what is the doubler price in the USA?
     
    Pablo-UA, Jun 19, 2012
    Pablo-UA, Jun 19, 2012
    #9
  12. Jun 19, 2012 #10
    Pablo-UA

    Pablo-UA Road Train Member

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    Borispol, Ukraine
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    one more bad quation for dealer.... why not to follow TCU power supply test procedure before changing any unit.

    This procedure is provided by ZF for every on 12V truck transmission setup for US and European dealers. According this procedure first of all mechanic checks for doubler supply with 20 A load (we use high beam bulb), after that the same procedure for doubler output. All diagrams and procedures are in open access (no login) of ZF portal.

    Volvo manual says to check TCU power supply with any Volvo, ZF and Alisson transmission. And there are recomendations to use component maker's manual too.

    Volvo wants every mechanic think, not to be a dumb parts changer.
     
    Pablo-UA, Jun 19, 2012
    Pablo-UA, Jun 19, 2012
    #10
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