Question about 1998 Lexus ES 300
I believe the voltage regulator is controlled by the ECM ....computor
Posted on Jun 09, 2016
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Posted on Jan 02, 2017
SOURCE: Car won't stay running.
alternator does not hold a charge it simply charges the battery by unhooking the battery you are taking all voltage from computer and car will not run the proper way to test your alternator is use a multimeter and check voltage at battery while car is running if you have 13-14 volts it should be fine.
Posted on Nov 18, 2008
Posted on Sep 01, 2008
disconnect the + lead of the battery
Remove the wires going to the alternator. Mark them with a piece of tape so you can put them back to the same terminal.
there are probably two bolts that need to be removed. One will be fastened to a slotted strap. Removing this one will allow the alternator to pivot on the remaining bolt. This will be the one that allows the fan belt to be removed from the pulley on the alternator. Removing the 2nd will allow the alternator to be removed from the engine.
Installation of the replacement is the reverse procedure. Aftere you install the 2nd bolt, put the fan belt back in the slot and pull the alternator so the slack is taken up in the belt, then tighten the bolt
Posted on Oct 22, 2008
SOURCE: ECM Replacement
This is a useful link on the code difinition, what it looks like is that the new ECM has a specific key code from the original car, there is a procedure for this issue, either you get new keys made from Lexus/Toyota or find out how to erase the code in the ECM, this code is why the eng won't start, I have no Lexus manuals at home nor does FixYa.com, at this point I would try to get the info from alldata.com, but it is a pay site, unlike this site which is free, and by the way I'm not employed by FixYa.com, just trying to help on my own time, I am a retired techincian.
Posted on Dec 01, 2008
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