Question about 2006 Mitsubishi Galant

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Replaced alternator 3 times and battery 2 times and still getting various readings from alternator voltage on a 2006 mitsubishi galant 4 cycindler ?

Could this be the voltage relay or would it be the computer

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Depending on the variations
after starting or cranking for a while the voltage will read 14.5 to 14.8 volts as the battery charges up that reading will drop back to 13.2 volts
it will be lower at idle 12 >13 volts as the alternator speed has to be around 1,500 rpms to get the alternator to charge
using the lights and any extra power requirements the voltage will go up to max of 14.5 -14.8 volts to compensate for the extra current required
drive belt condition and tension will cause variations if it is not correct
bad connections ( dirty terminals , loose harness fittings , corrosion) will all affect the ability of the alternator /regulator to produce constant voltage
you will have to ask an auto electrician if the regulator is part of the ECM as most have the regulator in the alternator or a separate unit on the fire wall
If it not part of the ECM then the ECM will have no bearing on the readings

Posted on Dec 05, 2016


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