MoTeC PWC Plug-In ECU - Manual (Page 20)

MoTeC Kawasaki Installation 13
MoTeC ECUs control the idle stepper motor without reference to its initial
position when the Jet Ski is powered up. The stepper may still be parked in
the open position upon the first start , resulting in high idle RPM.
There are two strategies which reduce this condition:
1 – Preset the idle stepper before removing the stock ECU.
As the stock ECU repositions the idle stepper to a parked position when
stopped, it can help if the idle stepper motor is unplugged before the Key is
removed. To do this the engine should be running in the water at a stable idle
speed, with the engine at normal operating temperature. Unplug the stepper
motor plug which is located on the throttle body, and then remove the Key.
With the stepper in its normal operating position the PWC Plug-In ECU can
now be installed, and the stepper motor plugged in prior to running the
engine. This procedure need only be followed once, as the M400 ECU does
not park the stepper motor when the key is removed.
2 – Make temporary changes to the idle control settings to
close the idle stepper.
After initial installation of the Plug-in Adaptor Loom it may be necessary to
make temporary changes to the idle control settings until stable conditions are
achieved. The best option for a new installation is to make the stepper close a
little each time the engine is started.Then the standard idle control settings
may be re-set for further use.
•
In Functions | Idle Control | Setup, set the ‘Activate RPM’ to 5000.
•
In Functions | Idle Control | Initial Position, set all values to -50.
If you have -50 set for the initial position and after about 6 starts the engine is
still idling fast, the answer may be the idle air bypass in the throttle body (very
difficult to adjust).
Once a good starting idle has been achieved, re-set the control values:
•
In Functions | Idle Control | Setup, set the ‘Activate RPM’ to 2400.
•
In Functions | Idle Control | Initial Position, set all values to 0.