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Old 04-22-2020, 12:58 PM   #1
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Engine: 7.3L Navistar T444e Diesel
Beeping In Cockpit! (???)

My bus has started to beep sometimes after about half an hour or so of run time. Sounds like the same beeping as when the brake air pressure is waiting to go up, but it's doing it when air pressure is fine. I removed the air line to the door opening piston, since I closed that off. But I capped that line a while back, and this beeping started recently.


I attached a picture of the buzzer making the beeping sound. I followed it under the dash. If I push on it, the beeping gets "garbled".
Anyone have any idea what this could be, or how to figure it out?



Thanks,


Joe



BUZZER_IMG_0680.jpg


Temp at 150
Tranny below 100
Amps at 0 (could the gauge be busted?)

Oil is 25PSI
Air Brake PSI at about 100PSI
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Old 04-22-2020, 01:25 PM   #2
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Might want to get a list of the active codes in the ECU. If you don't have a scan tool you'll have to look up the procedure, but it involves pressing a button under the dash and counting the blinking lights on the dash.


I had the same problem with a buzzer. Codes were good, engine temp was good.. I pulled the buzzer Not saying that's what you should do, though!
In the end my issue could have actually been related to the engine temperature sensor. An aftermarket analog style one was added from the previous owner because the built-in dash temp sensor didn't work.
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Old 04-22-2020, 02:32 PM   #3
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Quote:
Originally Posted by jazty View Post
Might want to get a list of the active codes in the ECU. If you don't have a scan tool you'll have to look up the procedure, but it involves pressing a button under the dash and counting the blinking lights on the dash.



Thanks!


Anyone have a scan tool they recommend? It would be good to have one.
I have one of those for my FJC and Jeep. It's OBD2 and works with my iphone and ipad, but haven't seen one for diesel/Navistar T444e
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Old 04-22-2020, 03:24 PM   #4
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you need a special connector and some software.
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Old 04-22-2020, 03:31 PM   #5
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Scangauge D, Silverleaf or Bluefire.
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Old 04-22-2020, 07:00 PM   #6
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OK
Sounds like a good idea.




What's Silverleaf and Bluefire?
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Old 04-22-2020, 08:36 PM   #7
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I get the same beeping occasionally, despite my air pressure being fine. There are a few other threads here about it.

I was under the impression this was just a malfunctioning air pressure sensor. Are you guys saying this beeping could be indicating some other problem, like not related to air pressure? Is this beeper some kind of general purpose alarm that could mean all kinds of bad things?
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