Throttle body codes P1620, P1614, P1619

[krisholcombe]

2021 GTX230 check engine light and codes P1620, P1614, P1619
Any idea if this is an easy fix? Dirty throttle body?

 

[skiasylum]

Any recent battery issues that you would have jump started or charged the battery while it was in the ski?

 

[krisholcombe]

Any recent battery issues that you would have jump started or charged the battery while it was in the ski?

I did have it on a trickle charger in the ski. Should I not?

 

[skiasylum]

Seadoo recommends not charging the battery in the ski while it’s still connected to the wiring harness. It’s in your Operating Manual. There have been issues with damaged ECM’s from trickle chargers. The three codes reference “damage” to the circuit, throttle actuator, or ECM. Trouble shoot in that order and hopefully it’s not your ECM.

 

[krisholcombe]

Is there a way to reset the ECM to see if that clears it?

 

[skiasylum]

You can try disconnecting the negative battery cable for 30 seconds.

 

[krisholcombe]

You can try disconnecting the negative battery cable for 30 seconds.

Any idea how to troubleshoot the throttle body actuator?

 

[skiasylum]

The throttle plate should move freely from the rest to open position. If it doesn’t it’s salt corrosion or carbon. Mechanical. If it moves freely it’s software and you needs BUDS diagnostic software and a service manual to check the TPS.

 

[mkov608]

Any idea how to troubleshoot the throttle body actuator?

Here's a picture.

For clarity: The throttle actuator (TAS) is on the handle bar). It sends the torque request to the ECM. It's a dual hall-effect sensor (two signals with different voltages); so if you know how to troubleshoot an electronic throttle on a car, the theory of operation is the same.

The TPS sensor is located inside the throttle body; once the ECM commands the throttle to the commanded position, the TPS reports the position back to the ECM. The TPS is also a dual hall-effect sensor.

The best way to trouble shoot this system is with a lab scope. By back probing (for example) B-A3 (TAS signal 1) and setting the other lab scope channel to A-K3 (TPS 1), you can compare the signals and see what is dropping out. The repeat the procedure between TAS 2 and TPS 2. Then compare both TAS signals to each other and TPS signals to each other.

The BRP service manual doesn't mention using a lab scope to troubleshoot a throttle problem. BRP steps are:

1. Perform an off throttle reset (BUDS or Can Doo required)
2. Check wiring
3. Change throttle actuator
4. Change ECM.

With the lab scope (yea I know ... not everybody has one), you can quickly isolate the problem to the exact component.