Can not figure this one out, sets of mil light, battery tests good, cleaned ign 1 fuse and receptacle. I also cleaned battery connections thinking I had a voltage drop problem. If I clear code it will come right back within seconds of starting car. Please help can not pass emissions test with mil light lit. Just finished replacing head gaskets so motor/tranny was out. I believe it sets off code if voltage varies more than 2 volts. This is my only problem after doing such a big repair and it is bumming me out!
Looked at some wiring diagrams, car has something like 5 ignition feeds 2 from pcm and 3 from battery ign 1 feeds the icm which is the plate assy that coils sit on. Before I go get one anybody ever had the icm ignition control module go bad if so what king of demons did you encounter?
That's the ICM (Ignition Control Module). The ECM (Engine Control Module) is an OBDI acronym for what is now (OBDII) called the PCM (powertrain Control Module).
Just got this code after chasing down issues with my turn signal. The code only shows up under PCM menu. What are some things I can check? Car seems to start fine and idle fine, I cleared the code and it came right back. I didn't have this code before I learned how to check them from the "How to pull codes" sticky".
OldStuff has a point, there are so many to be missed. The one under ICM is left off a lot, there is another large one on back of engine(Bill Buttermore left off) that goes to exhaust stud and another trans /engine rear area that several grounds goto. Main Ground is on front of engine as I'm sure you know.
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