Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
So I recently had to replace my engine computer on my Dodge Challenger 2015 sxt(due to my push start not working). So everything was good the fine till the next morning. I get in the car and hit the push button....nothing i hit it about a good 5-8 times then it finally cranks. After that its good for the rest of the day. Please help me guys
hi sir not a journeyman yet but I am curious as to exactly why you changed pcm out was there a driver out what signal was missing just want to know exactly why the computer was changed out its quite a process to rule out pcm scanner danner stresses going thru all powers and grounds and testing drivers too it must be conclusive as some pcms and modules are very expensive I am not familiar with push button starting circuits but some very specific testing should take place before rul;in g out modules
Last edit: 7 years 6 months ago by chief eaglebear.
So basically the no start problem was attributed to the pcm and now it looks like the same problem is back, that is what you are saying?
You should have a look at scan data to make sure the start request is seen by the car, the transponder is recognized etc. Data stream will be your friend on this one.
If you had any doubts about it then you should read on how the starting system operates. Next in line is wiring diagram and tests on the car.
An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.
The following user(s) said Thank You: Andy.MacFadyen
hi andy would those relays be comtrolled by computer that circuit is kinda COMPLEX FOR ME BUT I SEE EVERYTHING CONTROLLED BY COMPUTER ABOVE AND BEYOND THAT COULD ONE OF THE RELAYS NOT HAVE A GROUND THIS IS A VERY INTERSESTING CIRCUIT SORRY FOR THE LARGE CAPS
Yup, We replaced the engine computer and it was fine for a day or two. And back to the not working again. My mechanic is completely flummoxed and that is frustrating and worrisome to myself a non-mechanic but where there is a will there is a way. Will adhere to your post and come back with the findings on Monday. Thank you brother
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