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Originally Posted by Witek_M ...See if your battery voltage does not drop below 10V on startup or you will have same problem with new control module. Do you have wiring diagram for ACC? That' a good thought. I did run the battery down once by not closing the hatch tight. I just assumed these would have battery run-down protection for stuff like that. ...
Thread: 2000+ Heater Trouble  |
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Started 1 month, 1 week ago by benzml350
All of a sudden I have no heat in my 2003. The AAC controls appear to work and the blower motor responds appropriately but I can't redirect any airflow. I removed the drivers footwell cover and glovebox and see no motion on any of the actuators no matter what I do with the controls. The early cars are discussed extensively here but I'm not sure all that applies. It appears 2000+ have all the ...
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Witek_M replied 1 month, 1 week ago
One thing that all computers want is clean stable power supply. AGM from Interstate MTP-H8A is good deal. 30 months free replacement, 85 months prorated.
For manual get CD from MB dealer it is around $100. Part number T-2700-163-05.
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Witek_M replied 1 month, 1 week ago
Here is link to ordering SDS. Page 15 has pricing. http://www.startekinfo.com/StarTek/o...tedDocId=10 971
Most dealers charge 1.5h for Quick Test and print.
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43sqd replied 1 month, 1 week ago
Here is a Tech. Serv. Bulletin on problems with the AAC Control Module. Pull yours and see if it is any of the ones mentioned.
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benzml350 replied 1 month, 1 week ago
Interesting TSB. Unfortunately mine is not temporary. Still it means I may be on the right track. I'll check AAC part number and certainly find out what part number the junkyard has. Not much point in paying good money for suspect parts. Also, it seems like a quick check of the data line might be worth the effort. I actually hope it's the AAC since it's the easiest to change. The 1.5 total ...
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Witek_M replied 1 month, 1 week ago
Quote:
Originally Posted by benzml350 Interesting TSB. Unfortunately mine is not temporary. Still it means I may be on the right track. I'll check AAC part number and certainly find out what part number the junkyard has. Not much point in paying good money for suspect parts. Also, it seems like a quick check of the data line might be worth the effort. I actually ...
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timoparn replied 1 month, 1 week ago
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Originally Posted by Witek_M
Going back to your original problem and DTB. ACC module stores learned position values for all servo motors in memory. There is procedure in SDS that gets them normalized again. On most MB's there is combination of buttons you push to get that same thing accomplished. For the life of me I can't find it for ML. Local tech ...
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timoparn replied 1 month, 1 week ago
Quote:
Originally Posted by benzml350 All of a sudden I have no heat in my 2003. The AAC controls appear to work and the blower motor responds appropriately but I can't redirect any airflow. I removed the drivers footwell cover and glovebox and see no motion on any of the actuators no matter what I do with the controls. The early cars are discussed extensively here ...
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benzml350 replied 1 month, 1 week ago
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Originally Posted by timoparn For information - my Automatic AC had similar symtopms- no connection to servo motors. Did you try and test voltage to the actuator bus? You can access one of the actuator plugs very easily from the driver's side footwell, low on the center console. It's I had 5.1V on the outer 2 wires (center is data). That would seem ...
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Witek_M replied 1 month, 1 week ago
Looking at diagram you should have battery voltage there.
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