Kawasaki STX-15F service manual Input Voltage at ECU Standard 4.75 ∼ 5.25 V DC

FUEL SYSTEM (DFI) 3-29

Throttle Sensor (Service Code/Character-11/tPS)

•Turn the ignition switch ON and push the lanyard key un- der the stop button.

•Pushing the start button, run the engine 5 ∼ 6 seconds at idling to measure the sensor input voltage.

○Wait 15 seconds before using the starter again.

Input Voltage at ECU

Standard: 4.75 ∼ 5.25 V DC

•Turn the ignition switch OFF.

If the reading of input voltage is less than the standard, check the ECU for its ground, power supply and wiring shorted. If the ground, power supply and wiring are good, replace the ECU.

If the input voltage is within the standard range, check the input voltage at the throttle sensor connector.

•Remove the air filter temporarily (see Air Filter Removal).

•Disconnect the throttle sensor connector and connect the setting adapter [A] between the harness connector and throttle sensor connector.

•Connect a digital meter to the setting adapter leads.

Special Tool - Throttle Sensor Setting Adapter: 57001 -1521

Throttle Sensor Input Voltage

Connections to Sensor

Meter (+)→ R lead

Meter (–)→ BK/W lead

•Install the air filter.

•Turn the ignition switch ON and push the lanyard key un- der the stop button.

•Pushing the start button, run the engine 5 ∼ 6 seconds at idling to measure the sensor input voltage.

○Wait 15 seconds before using the starter again.

Input Voltage at Sensor

Standard: 4.75 ∼ 5.25 V DC

•Turn the ignition switch OFF.

If the reading is out of the range, check the wiring (see wiring diagram in this section).

If the reading is good, check the output voltage of the sensor.