Got a 2015 mac end dump that started acting up after TA swapped a tire for me. It will go 40 minutes fine then suddenly throw codes. Ive already replaced all 4 sensors and had them pulled and reseated twice, the ECU, valve, actuator and all wires, pigtail, connector on both truck and trailer as well as the connectors from the valve. All 4 wheels read rpm when spun and i still get an ABS light after exactly 40 minutes every single time. I am about $3000 down this particular hole and its been in 3 diffrent shops and programming checked twice with zero results and im running out of things to check and replace. Keeps giving me yellow blue and solenoid errors on a haldex system.
Any ideas?
2015 mac end dump ABS fault
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Arctic_fox, Aug 13, 2022.
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I do not know but would be looking real hard at the hub it first began on.
Was it just flat or came apart and beat around on the axle? -
BoxCarKidd Thanks this.
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Usually what ends up happening is the sensor inside the wheel doesn’t make contact or falls off because the person who did the job didn’t clean the area properly, didn’t place the sensor or clip correctly, or simply didn’t put the seal in its place and ended interfering with the sensor (which would push/force the sensor out) -
Nope, took it in and everything is seated correctly and in place correctly and i then pulled cleaned and reseated them per the guide when they still didnt work. Also tried a now 3rd entire set of brand new sensors. Said sensors are reading as they should according to my computer as well.
At this point ive made an apointment with the manufacturer directly to see if THEY can fix it. Neither me, utility, jim hawk and a small indy can figure it out apparently and im now almost $4500 down this rabbit hole and still dont have a working trailer ABS. I even tried bypassing the current electeical leads with a test jig i made. Still nada. -
Do you know how to read the blink codes? Some abs systems you can key off, key on, key off and count the flashes. It might narrow down the problem. Google abs blink codes.
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I had same issues with Haldex on some 2014-2016 Heil pneumatic tanks. Constant issues. Contacted Haldex and they sent me their diagnostic/engineering level program on a laptop so we could datalog and make some changes. Made quite a few changes especially on trailer weight settings, but still wasn't right. I finally just started replacing with Wabco kits for about $1200 a pop and cured ABS light issues.
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ArcticFox - So the sensors were replaced, did you check that they were original OE sensors and not a knockoff? The oddball ones have a different resistance and can go out of range as you're driving as the wheel end temps go up. Also, what were the YE/BU faults you were getting with the PC? Those specifics can really narrow things down.
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