Quote Originally Posted by In-Tech View Post
Momentary 12v on key up to the diagnostic pin should put it in boot mode, not ground.
I'm not sure what you're trying to say. The diagnostic pin is already 12V (through an internal pull-up resistor). The only available option for this pin is to ground it, which puts the CCM into diagnostic mode. Here is the relevant section from the FSM. It also addresses spfautsch's earlier comment about some CCM-related DTCs not setting the SYS light.

ccmdiagnosticmode.jpg