2018 seadoo spark P2620 P1120

[kmarts]

As the title says, im trying to fix a seadoo throwing P2620 and P1120.

Codes are TPS value not correct, and Throttle positions calculated from TPS 1 & 2 are not correct.

So I already swapped out the throttle trigger and the throttle body for known good ones. Reset TPS with candoo pro but same problem.

The ski is hard to start without holding throttle lever half open. Then it starts and goes immediately into limp mode.

I can see the TPS value go from 10 to 100 in candoo when moving the finger throttle.

At this point im inclined to believe it's electrical but dont know where to look. Put a new battery in it too, cleaned up the grounds. I dont want to guess throwing parts at it because an ECU wiring harness is $800 here.

After picking around for a bit it also threw P0122 and P0222 whis is something called 'TAS' short to ground.

Any thoughts?

 

[kmarts]

I found the ECU B(?) harness resting on the throttle body and some wires worn through from vibration. I soldered in new wire and re-wrapped. Same problem. Tracing the wires they weren't related... oil pressure sensor, and coolant temperature sensor, which were/are all working.

With the ski off and candoo connected i can watch the TPS value increase to %100 as i gradually squeeze the throttle. I can hear the throttle body opening at the same time. As mentioned before I swapped those parts (one at a time) with a known working ski and had the same codes with limp mode.

The pins of the steering harness all seem OK. Im kind of at a loss of what to look at.

The code chart says damaged actuator, damaged wires, damaged connector, or bad ECU.

Could be a wire somewhere but it's not clear what actuator the codes are referring to. Does it mean the finger throttle or the actuator on the throttle body?

 

[kmarts]

Ok so it appears this is resolved, but im not %100 sure on which thing I did that fixed it.

I left this ski sit for the long weekend and looked at it Monday when I got back. Problem still existed.

I had gotten confirmation on the candoo forums that these codes were related to the throttle body actuator and not the throttle lever on the handle bar.

So I pulled the throttle body again and cleaned it. I also opened up the actuator housing and checked the resistance of the 4 traces the wiper arms sit on. Everything looked OK, put it back together.

One detail I forgot to mention was the owner told me this happened after his kids rolled it and that it got full of water.

I had already pulled most connectors apart and blew out any water, but i did not do the voltage regulator connectors so i did them last night. The black connector pins were a bit cruddy so I cleaned that all up and re-assembled.

The issue is now fixed apparently but im not %100 what did it. Because I already swapped the TB for a known good one, I dont think the cleaning did anything. Either there is a bad wire somewhere I jostled into working or maybe the power/ground at the rectifier connection was bad. Not entirely sure but I'll take it.