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Battery redlining code HVAC controller 146s254 03. Cascadia…

Battery redlining code HVAC...

Battery redlining code HVAC controller 146s254 03

Mechanic's Assistant: What's the make/model/year of your truck? Engine type?

Cascadia 2010 dd13

Mechanic's Assistant: Are you fixing your truck yourself? What have you tried so far?

Yes. Fixing myself. Just got the code. Saw battery redlining and ac shutting off and on perodically

Mechanic's Assistant: Anything else you want the truck mechanic to know before I connect you?

Sam controller code comes and goes

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Customer reply replied 4 months ago
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call.
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Jeremy
Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 3,782
Experience: ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician
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My name is ***** ***** I will assist you with your question today.

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That is an issue in the SAM module iteslf getting a voltge high. Check the alternator and rule out the internal voltage regulator. Unless you have other codes that start with 25 or 33, it is completely in the SAM moidule from the alternator with the code you have given.

Now 2 things to check would be the A/C clutch and the front blower motor. They can pull too much amperage and cause the alternator to output more, which causes that code. However, there is usually another code that comes up with this code. There is the possibility to have just the one code for I've seen weirder things on these trucks.

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Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 4 months ago
Where exactly is the sam module. I also connected a stereo amp. I did put a fuse between the amp right at the battery. I not sure if that would be a problem. I have one of the bigger alternators.
Customer reply replied 4 months ago
Hello
Customer reply replied 4 months ago
Need help with Sam module location
Customer reply replied 4 months ago
Phone is blocking me

The SAM module is on the right side of the dash, below where the glove box location is. it looks like this CLICK HERE and requires programming if it is touched at all. It is the "brain" of the truck and does all the switching, talking between modules, etc for the whole vehicle.

You added an amp? Unplug it and see if the issue goes away. you may need a capacitor on the amp line because the alternators trickle charge when they see a high amp draw and will redline, then code out. The amp may be pulling too much during high demands. This particular vehicle modeisre very, very sensitive to amp draws.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 4 months ago
Disconnected amp and battery is still redlining. Possible disconnected ac clutch and still redlining. Possibly need new alternator

That sounds like an alternator then. The voltage regulator in it is putting out too much and over charging.

Jeremy
Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 3,782
Experience: ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician
Verified
Jeremy and 87 other Medium and Heavy Trucks Specialists are ready to help you
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Customer reply replied 4 months ago
10-4. Will start there. Headed to freightliner now. Thank you
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