P0603 Internal Control Module Keep Alive Memory (KAM) Error Looking for a wiring diagram for the pcm and pin location for the keep alive memory function, i keep getting the code and want to fix the short. Thanks Gerald.. 2000 f250SD, 00 7.3 pcm errors P1280, P0472, P0237, P1690, P0231, P0603, P0470 Hi All. Anyone have any advice for me. I am unable to communicate with pcm using a VMM2. Video Archives | Hollywood Click to see our best Video content. Take A Sneak Peak At The Movies Coming Out This Week (8/12) Simone Biles is Mental Health #Goals My Remote Car Starter Stopped Working! - DON'T PANIC! Jan 29, 20112. Gm vehicles are notorious for issues with the ignition switch and wiring. Double check all of your wiring and connections. Could just be a loose ground or power connection from the remote starter to the ignition harness. Cold weather would put more of a demand on the ignition circuit. I’m hoping this gives you a start!