Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Hello, is it charging at all or no charge?
It is not charging at all.
Ok, alt tested ok, new battery etc and code 41? what many people do not know is that Dodge is a bit unique in that the alternator usually does not fail but the vehicle computer does. The charging system/regulator is 100% controlled by the engine computer,. the fact you have the light and code 41 leads me to bad charging circuit within computer. this was/is very common. we have replaced many computers over the years on these engines. here is the formal description via the shop manual.Coming next
CHARGING SYSTEM DESCRIPTION Voltage regulation is necessary on all vehicles that have a charging system with an alternator. All voltage regulators limit the voltage the vehicle's charging system produces. The need for this regulation is most critical on vehicles with electronic devices, such as an engine controller, body controller, or ETR radio. Inconsistent voltage levels or excessively high or low voltage levels have a negative effect on the performance and durability of electronic components. There are two basic functions of a voltage regulator:
The engine controller contains the voltage regulator function. The engine controller uses the battery voltage sense, the battery temperature sensor, and its own program to determine the charging system's voltage goal. The voltage goal is adjusted by the controller based on changes in the voltage sense and temperature values. The basic voltage regulating function is to keep the charging system voltage between 12.9 and 15.0 volts. The voltage regulator accomplishes this by controlling the current flow through the rotor. Since the rotor is electromagnetic, controlling the current through the rotor effectively limits the strength of the magnetic field and the output of the alternator.
Any suggestions for a source of aftermarket ECUs?
Would an after market ECU be Ok? I am sure the dealer's cost would be more than the vehicle is worth.
let me check and see what the ECU runs . Back shortly
is your truck auto or manual trans? also, is it in california?
it is manual and not in california
Autozone has good price between $155 and $197. the $155 is with auto trans and trade in your computer. $197 is with manual trans and trade in your computer
manual is the higher price unit but $200 at autozone not bad. A good alternator can run that much and new not reman
Dealer I think is in the $500 range but... theirs is new NOT reman
Reman is just fine
Unfortunatley, the ECU can not be repaired just for no charging, has to be replaced as whole unit
Thanks for your help.
You are welcome. Sorry its not the best news but.. with this system, it can be a bit costly. 99% of the time is the computer
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The heater/AC system changes to the defrost mode during a low vacuum condition such as during trailer towing, hill climbing, and acceleration.
This bulletin involves inspection of the heater/AC vacuum system and installation of a revised vacuum check valve.
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