megatron

That's what I heard, and I have no clue why. They're trying to make a Mack that is a mass production disposable truck and that's what Volvo become now days, and not just them. If I decide to let go on Mack and how I see things vith Volvo that most of those trucks is born with problems that cost so much time and money what I have to expect from a Mack that's built by same people. I have to admit that Mack become very comfortable truck compare to older before Volvo get involved but quality is catastrophic. I'm OTR O/O and for specialized transport I just don't see Mack any more as a workhorse reliable truck, but I still hope that I'm wrong and someone will proof me wrong

There is no Mack anymore...😔 I owned a Mack truck for so long that I felt so sad other day when my wheel bearings failed and on the new hub it said Volvo made in Austria...junk. Looking to buy a newer truck in future but now I'm lost but Mack to work in specialized tranport doesn't exist anymore. It's just pu..y volvo truck with dog on the hood (I hope someone prove me wrong) and I will be forced to go with KW T800. Looking at today's Macks I really don't know what to think. I'm heartbroken 😭 that toughest truck and most profitable is destroyed. No more Titan no more Rawhide, what we have now ?? Anthem?? 

How ECM know that fan output is Not on?

Look like the problem is somewhere between fuse and conector to A/C system. I checked everything around that I can see. Now I have yellow light on with 4-2 message and I know that's fan output. If it's not somewhere in harness than don't know where else to look. I run another wire to power APADS and it's start working normally, but 4-2 didn't go away so I hope I'm wrong, as I see the problem is hiding in the harness, where...?? God know. I'm on the road now and don't have tools to trace problem, or you have better idea 💡 

Fuse have power if right info, checked all wire between fuse and HP sensor no any voltage 

Thank you now I have all info needed. 

1 hour ago, Macktech689 said:

Voltage to the APADS also comes from fuse 41 ( 15a )  down the red wire, but before it gets there it runs through the Freon  high pressure switch connector. Also check the APADS ground.

I'm sure there is no voltage in red wire

Thanks, as I said before I don't have fuse numbers it's missing, there is one fuse in outer box that is not powered. is 41 in box on the firewall??

Hi everyone, I have 05 Mack CXN613 and A/C quit working, after I check all fuses notice that APADS lights not coming on at all so I'm not sure how to check that component because green wire is powered when I turn A/C on is there something I'm missing, also I don't have fuse guide in my outer fusebox cover and not sure what fuse is for what, if anybody knows plz let me know it's hot in this cab 😩

If MackPro doesn't know than I'm selling this Bulldog 😂😂

You have to first check where is a problem, it can be the pin at rod connection or actuator inside. Seen a problem like that and solved easy with pneumatic tool oil. I opened the air line on actuator and putt some lubricant in. Than I manually (using a wrench) pull on the actuator rod couple times. It was about 7 months ago that driver didn't complain yet. I'm just trying to give you idea. There should be air drier filter for VGT that people don't like to change and to much moisture damage control box or actuator cylinder 

actuator and sensor itself cost about $1400

I have Cxn613 for 3 yr don't really know what's a difference 

I

Is it first time happening or have same problem before?

This is going to be one hard to find since we check everything OK , the only questionable item was FAN speed sensor.... butt no Foult Code by ECU. Pin No5 don't have 12V or any power, since harness is checked OK the only 2 things can be wrong. Something burn inside ECU at a time that belt broke and cutt a Fan wires, or this ECU need a good Fan Speed sensor reading to activate Power to operate Fan drive. Actually I can't get info of how this ECU is programmed and what Parameters it need to do it. Does it control Ground and hot wire or just ground ( all wires coming out of ECU)

Only test I can try is Feed 12V on the pin No5 together with harness connected and see how ECU will respond... 

😩😩 or take truck to dealer and ... and... just tell them to fix it $$$$ I will change my Megatron to Behr Mack Fan drive EXPERT

I WISH I newer sold my dear 99 Mack CH613 with almost 2mil miles on it was a Champion of roads

That's what I just think about, I check all procedure troubleshooting and nothing wrong unless wrong info getting in ECU and that's why it's on. Will plug a comp on it and find out I guess. I hope I can find a problem, fuel mileage drops fast with fan on... thanx Mackpro your info where really helpful now I understand this Visco thing a lot better than when I started messing with it

That's what I just think about, I check all procedure troubleshooting and nothing wrong unless wrong info getting in ECU and that's why it's on. Will plug a comp on it and find out I guess. 

It shut of with 12V direct input, now I don't know what to do, is there any way to check if any sensor keeping it on? Everything worked fine before belt broke and cut Fan Drive harness. 

I need advice 

Can't find nothing wrong, unless some sensor keeping fan on. At a time this happens with a belt I move truck of the road and trying to keep eng temp below 220 so don't know if I mess up a sensor or something butt I don't know how to check sensor unless I hook comp to it that I don't have

Thank you Mackpro, look like I will have to do several testing to this drive to determine what happened to this drive or harness. I think at the time belt cut the harness something get shorted.... 

I just don't understand how come there no any codes? 

I have problem Getting a Fan drive to Work after serpentine belt broke and take Fan control wires with it. I fix the wires butt now its engaged all the time. 

Check for 12V and other wires for 5V 

its not getting any, all wires are dead

No codes, butt if I pull fuse out I'm having 

code for "fan output" 

if anybody can help me troubleshoot this thing  its a Behr fan drive

Thanx

huh I'm so close finding a problem, look like its a one of the EUP fouled or something like that. Now truck run normal, most of a time, good power good boost. This morning after a run I stop at traffic light it start missfiring so bad allmost like one cylinder was dry, then it staight up again. (excuse this broken english plz I'm doing best I can) Is there any way of testing which one is it becouse it happening somethime, ofcourse NOT when im looking at it

yes it is. e7 427

I bought injectors at bosch, they tested old ones.

Yes we did, and two exhaust valve needed ajustment everithing else was ok. Today I run some test on fuel pressure and result was 95psi idle 120psi at 1600rpm. I olso faund big hole in charge cooler and replaced it today. Didnt pull a load yet butt I hope everithing will be ok. It realy sound perfect running the only thing I am scared of wrong part number on injectors, or something stooped like that...not for sure what exactly that boost temp. sensor do butt for sure they go bad sometimes. If u have any more ideas please let me know, and I will tell u how a truck doing tomorow. Thanks for help.

what is year of a truck? did u try any places?