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Old 08-19-2015, 08:47 AM   #1
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Musical low air warning

I have a 2003 Winnebago Journey on a Freightliner chassis and on the way home yesterday from the beach with the grandkids the low air warning went on and off a few times. The rear air gauge would go to 0 psi and the light and alarm would go off then the gauge would shoot back up and every thing would be fine till the mext event. We arn't loosing air it's just the gauge and warning buzzer going off. Anyone have this issue, or know where the sensor for the air system is. Thanks Ray
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Old 08-19-2015, 10:29 AM   #2
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The sensor is usually on the tank. Look at the rear air tank and see if it's there. Your issue could be with the wiring on the back of the gauge, a ground connection, etc. You might check with Freightliner or a local Freightliner service shop.
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Old 08-19-2015, 01:26 PM   #3
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Quote:
Originally Posted by RayJr View Post
I have a 2003 Winnebago Journey on a Freightliner chassis and on the way home yesterday from the beach with the grandkids the low air warning went on and off a few times. The rear air gauge would go to 0 psi and the light and alarm would go off then the gauge would shoot back up and every thing would be fine till the mext event. We arn't loosing air it's just the gauge and warning buzzer going off. Anyone have this issue, or know where the sensor for the air system is. Thanks Ray
RayJr,
Since your unit is an '03, your Freightliner chassis is most likely equipped with what's called the "VDC" or, Vehicle Data Computer. That computer, receives and processes, all the data from your engine ECM, the transmission TCM and, the ABS module. It also has two air fittings on it. Those fittings are connected to what's called "transducers" inside the computer.

And, the transducers are connected to the main circuit board, via soldered joints. It is a common problem for those solder joints, to be "cold soldered" as in the term, "cold solder joint". That means, those joints are not high quality joints and, can become defective. When that happens, your air pressures in the gauges, the alarms etc. can go nuts and, drive you, as the owner, nuts.

So, if you do a search for "VDC" you'll more than likely find, many threads on the subject and, how many folks have been successful or, not in repairing this unit. Incidentally, if you go searching for it, most of them on the '03 units and below, are located on the frame, on the passengers side, in or around the engine compartment. They are about 6"x6"x about 1" or so thick, black box. You'll see a large, multi-pin plug, maybe two, hooked to that box and, the two air lines.

Now, is this your problem, who knows? But, based on so many that have had the same issue, it sure leans towards being your problem. Good luck.

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Old 08-20-2015, 09:23 PM   #4
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I have an 03 Journey DL. Same problem. Was the VDC.
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