QuestionThe battery is not charging and the battery light stays on.
Alternator is ok, battery is ok.
The car does not start, it is over fueling and idles irretic. Could this problem be regarding the alternator not charging.
Talking to someone, they mentioned that it could be PCM, what is the PCM? and how do i check the PCM?
What else would you recommend me to try?
Thanks
AnswerHi Ilyas,
Yes, the PCM is the powertrain control module or computer. It is located on the left side fender, next to the fuse/relay box. It does control the field coils of the alternator (turns it on and off) which will determine the output voltage of it. So that, coupled with the engine malfunction, could mean that the PCM may have larger problems than just the alternator control. The best way to find out is to read the memory of the PCM for any faults it may have noticed, or even noticed that it itself is faulty, and stored that information as a 4-digit code. The sure way to find out is to attach a code reader to a 16-pin plug that is located under the dash next to the steering column. If such a reader were available to you that would be the best thing to use. There is a slight chance that if you took the ignition key and turn the switch "on-off-on-off-on and leave on" doing that in 5 seconds or less elapsed time. Then watch the odometer window of the dash to see if the mileage reading changes to show any 4-digit numbers. This may not happen, but give it a try. One way or the other, getting the code numbers is the most efficient way to know what to do. Once you get the number(s) let me know and we'll go from there. You may have to call around to shops that service US vehicles to find what is known as an OBD-II code reader and have the van towed there, or buy a reader for around $100. I wish there were a less expensive way but there is not.
One other item to check is called the exhaust gas recirculation valve (egr) which is located in a pipe that runs from the exhaust manifold back to the air intake manifold (below the throttle body). It has a round vacuum-operated top, the body of the valve is in the pipe, and there is a flange in between those two parts. Inside the flange is a valve stem with a slot in it, which has a slot. The tip of a screwdriver inserted in that slow will allow you to move the rod (stem) back and forth, against spring-action in one direction that tries to close the valve. If the stem doesn't move freely then spray some solvent on it and move the stem to get it to close tightly to a stop. It needs to be closed tight when you try to start the engine or the mixture will be too lean.
Roland
PS Use the "thank/rate" tab below to get back to me without having to wait for me to be 'available' to take a question. There is a space for comments. By the way, which country are you living? I have not heard of the 2.0L engine being used in a minivan.
