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Multiple dash codes

Discussion in 'Freightliner Forum' started by justanotherdriverhere, Sep 17, 2023.

  1. Sep 17, 2023 #1
    justanotherdriverhere

    justanotherdriverhere Bobtail Member

    22
    35
    Aug 8, 2019
    0
    Have a 2022 Freightliner Cascadia with an auto transmission. Recently multiple icons pop up on the dash randomly (all at the same time). They usually go away after the truck has been sitting with the engine off for a 10 hour break. I've had two different shops look at it but they have been unable to diagnose it because the icons go away when in the shop. The adaptive cruise control, active brake assist, tractor ABS, roll stability, and hill start assist all pop up at the same time. They seem to crop up during rainstorms and whenever hitting a large pothole in the road. Someone told me it might be a lose or corroded wire(s) somewhere. Anyone else had this issue?
     
    justanotherdriverhere, Sep 17, 2023
    justanotherdriverhere, Sep 17, 2023
    #1
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  3. Sep 18, 2023 #2
    SWM_TECH

    SWM_TECH Light Load Member

    139
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    Apr 15, 2018
    0
    An ABS fault could give you all those messages. If your getting a message in the dash the ABS ECU should be logging a fault. A shop should be able to read the stored faults even if they are no longer active.
    Diagnostic LInk can read them but typically a technician is going to use Meritor Toolbox software to read them and follow the troubling shooting they provide.
    That being said, intermittent faults are more difficult to resolve than a continuously active fault. A chaffing electrical harness is likely. If visual inspection of harness does not reveal chaffed area, wetting the harness can help technician pinpoint problem area.
    I have repaired a truck with similar symptoms. That particular truck had an APU and coolant lines running to the APU were inside a heat shield sleeve and they were not supported properly. In fact, that were laying on the electrical harness (to right the the transmission near right frame) and over time vibration chaffed the harness and abs wires were shorting against the aluminum heat shield sleeve.
     
    SWM_TECH, Sep 18, 2023
    SWM_TECH, Sep 18, 2023
    #2
    QUALITYTRUCK Thanks this.
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