Subthrottle Valve Actuator Removal
Caution: Do not remove the subthrottle valve actuator [A] since it has been adjusted and set with precision at the factory. Never drop the throttle body assy, especially on a hard surface. Such a shock to the actuator can damage it.
![](https://motoinstruction.ru/img/kawasaki/23/128310.jpg)
Subthrottle Valve Actuator Audible Inspection
Note: Be sure the battery is fully charged.
- Turn the ignition switch ON and ensure that the actuator valves open and close (make light sounds) several times within seconds, and then close at the idle throttle opening position.
- Turn the ignition switch OFF.
If the actuator does not work as described above, do the visual inspection.
Subthrottle Valve Actuator Inspection
- Remove the air cleaner housing (See Air Cleaner Housing Removal).
- Turn the ignition switch ON.
- Check to see that all the subthrottle valves [A] open and close smoothly.
If the subthrottle valves do not operate, check the actuator internal resistance (See Subthrottle Valve Actuator Resistance Inspection).
![](https://motoinstruction.ru/img/kawasaki/23/128311.jpg)
Subthrottle Valve Actuator Resistance Inspection
- Turn the ignition switch OFF.
- Remove the air cleaner housing (See Air Cleaner Housing Removal).
- Disconnect the subthrottle valve actuator connector [A].
![](https://motoinstruction.ru/img/kawasaki/23/128312.jpg)
- Connect a digital meter to the subthrottle valve actuator connector [A].
- Measure the subthrottle valve actuator resistance.
Subthrottle Valve Actuator Resistance
Connections:
- BK lead [1] <—> P lead [2]
- G lead [3] <—> W/BL lead [4]
Standard: About 5.5-7.5 Q
If the reading is out of the range, replace the throttle body assy.
If the reading is within the range, check the input voltage (See Subthrottle Valve Actuator Input Voltage Inspection)
![](https://motoinstruction.ru/img/kawasaki/23/128313.jpg)
Subthrottle Valve Actuator Input Voltage Inspection
Note: Be sure the battery is fully charged.
- Turn the ignition switch OFF.
- Connect the peak voltage adapter [A] and a digital meter [B] to the connector [C], using the needle adapter set [D].
Special Tools - Peak Voltage Adapter: 57001-1415
Type: KEK-54-9-B
Needle Adapter Set: 57001-1457
Subthrottle Valve Actuator Input Voltage
Connections to Harness Connector
- (I) Meter (+) → BK/BL lead [1]
- Meter (-) → P lead [2]
- (II) Meter (+) → G/Y lead [4]
- Meter (-) → W/BL lead [3]
- Measure the input voltage with the engine stopped, and with the connector joined.
- Turn the ignition switch ON.
Input Voltage at Actuator
Standard: About DC 8.5-10.5 V
![](https://motoinstruction.ru/img/kawasaki/23/128314.jpg)
If the reading is within the standard but the actuator doesn't operate, replace it.
If the reading is out of the range, check the wiring to ECU (see wiring diagram in this section).
If the wiring is good, check the ECU for its ground and power supply (See ECU Power Supply Inspection).
If the ground and power supply are good, replace the ECU (See ECU Removal/Installation).
Subthrottle Valve Actuator Circuit
![](https://motoinstruction.ru/img/kawasaki/23/128315.jpg)
1. ECU; 2. Subthrottle Valve Actuator