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99 vnlt.no speedometer

Discussion in 'Volvo Forum' started by QUALITYTRUCK, Aug 28, 2013.

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  1. Aug 28, 2013 #1
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    have a 99 vnlt version 1/cummins n-14 celect plus .no CEL or errors.speedo sensor new.cluster self test good.both wires from speedo sensor to ECM are good.problem seems to be from ECM to cluster.need to know wire pin position from ECM to cluster (Pablo maybe?)thanks in advance.:biggrin_2552:
     
    QUALITYTRUCK, Aug 28, 2013
    QUALITYTRUCK, Aug 28, 2013
    #1
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  3. Aug 28, 2013 #2
    baha

    baha Road Train Member

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    U have group of ground wires FT. lower fire wall {petals)
     
    baha, Aug 28, 2013
    baha, Aug 28, 2013
    #2
    QUALITYTRUCK Thanks this.
  4. Aug 28, 2013 #3
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    are you talking in cab by pedals or engine compartment?
     
    QUALITYTRUCK, Aug 28, 2013
    QUALITYTRUCK, Aug 28, 2013
    #3
  5. Aug 29, 2013 #4
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    tested twisted wires #401/402 from ECM to firewall.good.while driving cummins insite reads vehicle speed correctly.5 pin connector on back of cluster shows ground on #5 white wire.any help?
     
    QUALITYTRUCK, Aug 29, 2013
    QUALITYTRUCK, Aug 29, 2013
    #4
  7. Aug 29, 2013 #5
    Pablo-UA

    Pablo-UA Road Train Member

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    Can you see MPG reading on small display?

    really this instrumental cluster is not fully digital like on version-2. First of all no VECU, becouse Celect+ ECM cant be controlled by J1939, so J1708 is used, but as datalink only.

    If you cant use display to enter Engine ECM is diagnostic menu, plz check it, becouse with fault datalink all systems like engine ECM, ECAS, ABS keep working w/o any faul lamp
     
    Pablo-UA, Aug 29, 2013
    Pablo-UA, Aug 29, 2013
    #5
  8. Aug 29, 2013 #6
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    i can enter all diagnostics on screen.am able to all tests,read all parameters.found 401/402 next to fuse panel that are open wires with nothing connected.looks like maybe had qualcomm connected at one time.should these wire be open?i cant see where they might go to.
     
    QUALITYTRUCK, Aug 29, 2013
    QUALITYTRUCK, Aug 29, 2013
    #6
  9. Aug 29, 2013 #7
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    can dash speedometer head be bad even if gauges sweep o.k. during diagnostic self test?
     
    QUALITYTRUCK, Aug 29, 2013
    QUALITYTRUCK, Aug 29, 2013
    #7
  10. Aug 29, 2013 #8
    nasriza

    nasriza Road Train Member

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    Sometimes the dash connector in the back goes bad it has happened to me a lot of times with the abs and also datalink systems maybe u have a bad connection between dash and connector that could be a ##### to figure out if u can replace the termjnals and see what happens ive had it happen to be a lot of tines with 99 to 01 volvos its a ##### to figure out to
     
    nasriza, Aug 29, 2013
    nasriza, Aug 29, 2013
    #8
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  11. Aug 30, 2013 #9
    Pablo-UA

    Pablo-UA Road Train Member

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    yep, it is possible, becouse small display (Volvo calls it Drver's Display) outputs analogue data to speedometer.
     
    Pablo-UA, Aug 30, 2013
    Pablo-UA, Aug 30, 2013
    #9
    HopeOverMope Thanks this.
  12. Aug 30, 2013 #10
    Pablo-UA

    Pablo-UA Road Train Member

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    BTW, on some trucks (generally before '98) analogue speedometers were used. So look for 550-551 wires connected to dashboard. I remeber old volvos with two VSS ore VSS with four wires, one pair to ECM, other to speedometer
     
    Pablo-UA, Aug 30, 2013
    Pablo-UA, Aug 30, 2013
    #10
    QUALITYTRUCK Thanks this.
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