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Volvo 2013 ATC fault. Axle load sensor?

Discussion in 'Volvo Forum' started by Snailexpress, Sep 4, 2018.

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  1. Sep 4, 2018 #1
    Snailexpress

    Snailexpress Road Train Member

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    I have code MID136 SID69 FM2 and ATC light on. All manuals says "Axle load sensor" is the fault.
    Where is this sensor located. My head is steaming.
    Thank you
     
    Snailexpress, Sep 4, 2018
    Snailexpress, Sep 4, 2018
    #1
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  3. Sep 4, 2018 #2
    high_roller_302

    high_roller_302 Bobtail Member

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    Sensor is located behind the kick panel by your left foot. It’s an air transducer. I believe that if you look under the hood, there will be a 1/4” purple synflex line that connects to the pass through into the cab. The sensor that is plugged into the pass through within the cab at the same location is your axle load transducer.
     
    high_roller_302, Sep 4, 2018
    high_roller_302, Sep 4, 2018
    #2
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  4. Sep 5, 2018 #3
    Snailexpress

    Snailexpress Road Train Member

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    Yeah just figureout it from Bendix manual. Hmm bit confused.The rear axle pressure gauge on dash is working.
    Tomorrow will start.
     
    Snailexpress, Sep 5, 2018
    Snailexpress, Sep 5, 2018
    #3
  6. Sep 5, 2018 #5
    high_roller_302

    high_roller_302 Bobtail Member

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    Couple things... If you’re retrieving faults by using the cluster, the fault may not be reporting correctly. With Bendix, we always have to troubleshoot via ACOM (Bendix program). Even when connecting with Tech Tool (Volvo program) the faults frequently report incorrectly.
    That having been said, if the fault is correct, the FMI 2 indicates irrational or incorrect data. If there’s weight on the axle that the air gauge indicates is present, there may be a problem with the trailer emergency pressure switch. If the switch is not indicating that a trailer is connected, but there’s weight on the axles, it could code out. Have you tried running bobtail? See it the code goes away.
     
    high_roller_302, Sep 5, 2018
    high_roller_302, Sep 5, 2018
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  8. Sep 5, 2018 #5
    Snailexpress

    Snailexpress Road Train Member

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    I will post more details. I was searching for air leak. Secondary was losing presssure in about 2 psi per minute rate.
    Any small leaks in connections were fixed but was still leaking. The secondary has two lies coming out. One for the front brakes and one thru pressure protection manifold to supply all air bags, seat, inside the engine to purge aftertreatment injector, block of solenoids to operate differentials and fifth wheel, gear box selectors.
    I make the plugs to put on the end of the line to cut them one by one. My leak was inside the cab under floor mat line to the passenger seat. Unbelievable.
    The TCS light came on after I was wiggling all those wires and hoses under clutch pedal. PITA to open.
    I have Cummins Inline DLA and dash codes and Cummins Fault viewer says the same. My ACom doesn't work after updating. It can see the ABS computer but says fail to read. Probably this is why light is ON.
     
    Last edited: Sep 5, 2018
    Reason for edit: Edit
    Snailexpress, Sep 5, 2018
    Snailexpress, Sep 5, 2018
    #5
  9. Sep 5, 2018 #6
    high_roller_302

    high_roller_302 Bobtail Member

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    Just a thought, but check the condition of the terminals in the connector to the transducer. Make sure they’re not spread at all. Another thing, that transducer is a 3 wire sensor. The same sensors are used for the tank pressure gauges as well as the applied air for the service brakes. Try swapping them to isolate an intermittent issue. FYI, those sensors can be tricky to remove. I’ve found a panel fork tool works best.
     
    high_roller_302, Sep 5, 2018
    high_roller_302, Sep 5, 2018
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  10. Sep 7, 2018 #7
    high_roller_302

    high_roller_302 Bobtail Member

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    Did you get this resolved?
     
    high_roller_302, Sep 7, 2018
    high_roller_302, Sep 7, 2018
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  11. Sep 8, 2018 #8
    Snailexpress

    Snailexpress Road Train Member

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    Yes it's solved. The sensor plug wasn't sitting good.
    Have checked it with Bendix ACom Diagnostic. By Bendix manual the light will go OFF if fault not active after driving at least 15 mph or reset by software.
    Cummins Inline 5 doesn't work with newer version Bendix software. Nexiq 2 working just fine. Another $700 to invest.
     
    Snailexpress, Sep 8, 2018
    Snailexpress, Sep 8, 2018
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  12. Sep 8, 2018 #9
    QUALITYTRUCK

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    Grandview Engineering Solutions Columbus, Indiana. The product works. I have all interfaces. I could live with this one if I had to.
     
    QUALITYTRUCK, Sep 8, 2018
    QUALITYTRUCK, Sep 8, 2018
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  13. Oct 5, 2018 #10
    Snailexpress

    Snailexpress Road Train Member

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    My problem isn't solved. After some time with TCS light off it start turning on and now it is on all the time.
    Sensor replaced, firewall area wires checked.
    Lots of hours was diggin Volvo electrical diagrams and got stumped with it.
    Instrument cluster diagram shows rear suspension pressure sensor B58R connected to the cluster. Cluster gauge working properly without any problem accurately. This sensor is on the firewall and if disconnected the cluster gauge is off.
    2018-10-05 01_22_50-Volvo-12Volt-2013_1.pdf.png
    ABS schematic has rear suspension sensor as well but it listed under name B177.
    2018-10-05 01_32_49-Volvo-12Volt-2013.pdf.png
    There is only one sensor for rear suspension on firewall.
     
    Snailexpress, Oct 5, 2018
    Snailexpress, Oct 5, 2018
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