Of course there is something else. You need the enable signal from the ECM that enables the pulse module to engage the starter.
THEN, when the ECM sees the engine has reached 400 rpm (that is, it has started and it running on it's own), the ECM sends a disable to the pulse module, to disengage the starter.

I defy you to find this enable/disable line from the ECM to the Pulse Module. The pin descriptions in the service manual do not mention it, I believe that one of the pins is mis-labeled in the manual.


Here is the block diagram from the student reference, the connection in the red circle represents the enable/disable from the ECM (shown as PCM here). Note that the SLA (shift lever assembly) and other modules are connected to the ECM, it then tells the Pulse module "go" or "no go" for starter engagement.