Calling all electrical gurus. Ecu, wiring issue needing a solution

[ARIZONACLASSIC]

First off, "Hello" all. I am new to PWC and to this forum. This is my first Jetski; 2004 GTX 4-TEC Supercharged. I bought it (yesterday) with a no start issue. It was from an online auction so I have no previous knowledge about this unit. This is what I have figured out so far and how I've gotten there:
When I insert the "key" gauges come to life and I can cycle through the 'mode' info. But no beeps, no noise at all including fuel pump, solenoids, etc. No warning lights. Nothing happens when I press the start button. Checked all fuses and connections and all looks good. But....
When I pulled the 'B' harness from the ECU I noticed that one pin had broken from the ECU and was stuck in the plug. I want to know if this is the cause of the problems I'm having. I forget which pin it is on the ecu, but it is a red/white wire. My diagram shows that is comes from or goes to the MPREM(?) at pin 2-11 I believe. My diagram does not show what the wire does. Anyone out there have info on this?
Thanks in advance.

 

[Dennis]

Pin 2-11 (white/red) and pin 2-10 (white/black) are the wires the MPEM and the ECU use to communicate back and forth to each other. This broken pin situation is no doubt causing a serious problem. :cheers:

 

[ARIZONACLASSIC]

Awesome. It sounds like I'm on the right track. I guess the only real option is to replace the ECU. I could try to have someone solder the pin back on (it is still in the pigtail), but I think that might not last. So I guess I have two questions:
-Since I don't know anything about my new ski; is there a way I could bypass this pin just so i could hear this thing start? Like suppling a 12V signal to the red/white wire for example. I really don't want to spend $400-$700 for the ECU and it turns out the engine sucked up a broken washer or has blowby or something.
-Second; I read someone installed an RXP ECU in their GTX and got an extra 30HP. Is this for real? What ECU's interchange with my ski?
Thanks again in advance.

 

[Dennis]

You're not going to be able to bypass it. Gonna have to fix it or come up with a donor ECU and key.