Kawasaki STX-15F service manual ISC Idle Speed Controller Removal/Installation

FUEL SYSTEM (DFI) 3-73

Throttle Body Assy

ISC (Idle Speed Controller) Removal/Installation

•Remove

Seat (see Hull/Engine Hood chapter) Air Filter (see Air Filter Removal) Bands [A]

ISC connector [B]

Stepping Motor Mounting Screws [C] Stepping Motor [D]

ISC Actuator Mounting Bolts [E] ISC Actuator [F]

•Clean the mating surface of throttle body and ISC actuator (stepping motor).

•Replace the O-ring [A] with a new one.

•Install the stepping motor [B] and tighten the screws [C].

•Install the ISC actuator [D] and tighten the bolts [E].

Torque - ISC Actuator Mounting Bolts: 4.9 N·m (0.50 kgf·m, 43 in·lb)

•Route the harness and tighten the bands correctly (see Appendix chapter).

•After installing the ISC actuator, check the Smart Steering System Operation in the water.

ISC (Idle Speed Controller) Inspection

•Checkmeter. idle speed with a tachometer in the multifunction ○With the engine idling, open and close the throttle lever.

Idle Speed

Standard: 1 300 ±100 r/min (rpm) -both in and out of water

If the idle speed is within the standard, the ISC operates properly.

If the idle speed is out of the specified range, inspect the audible operation.

•Run the engine and then stop the engine.

•Certain buzzing and humming sounds will be emitted from the ISC [A] after the engine stop.

If the ISC sounds, inspect the ISC resistance.

If the ISC does not sound, replace the steeping motor.