TSU warning light

The first place to inspect would be the internals of the Wastegate Servo Motor.

It may be seized up.  Corrosion has been known to be an issue on Hangar Queens!

Does the servo motor try to cycle the wastegate when power is applied to the TCU, or does nothing at all happen at the servo motor? If nothing at all happens, it is possible that the TCU has failed. If it tries to cycle the wastegate but cannot, then something might be binding.

Thanks for the replies.  I know that the problem is not the cable nor the wastegate as I just adjusted the cable and it moved the wastegate control arm easily.  Sounds like I need to take apart the servo and see if it’s frozen as it doesn’t move when the tcu is switched on.

Hi

If you have a blinking yellow  warning light you  have a sensor or wiring Shaffer problem

I have just gone through this sager and found that I had a small amount of corrosion on the air box sensor plug

I sprayed it out and cleaned it and all good now

I had to connect the laptop to the TCU to locate which sensor was giving me the problem

I then went and removed them all cleaned all just to be sure

Mark BETTIOL wrote:

Hi

If you have a blinking yellow  warning light you  have a sensor or wiring Shaffer problem

I have just gone through this sager and found that I had a small amount of corrosion on the air box sensor plug

I sprayed it out and cleaned it and all good now

I had to connect the laptop to the TCU to locate which sensor was giving me the problem

I then went and removed them all cleaned all just to be sure

Mark, his servo doesn't move when he powers up the ECU. Does a failed sensor cause the servo to not move?