Kawasaki Ninja Service Manual: Subthrottle Sensor Output Voltage Inspection

Kawasaki Ninja Service Manual / Self-Diagnosis System / Subthrottle Sensor (Service Code 32) / Subthrottle Sensor Output Voltage Inspection

Measure the output voltage at the subthrottle sensor in the same way as input voltage inspection, note the following.

Disconnect the subthrottle sensor connector and connect the setting adapter [A] between these connectors.

Subthrottle Sensor Output Voltage Inspection

Special Tool - Throttle Sensor Setting Adapter: 57001 -1538

Subthrottle Sensor Output Voltage Connections to Adapter: Digital Meter (+) → R (sensor BL/W) lead Digital Meter (–) → BK (sensor BR/BK) lead

Disconnect the subthrottle valve actuator connector [A].

Subthrottle Sensor Output Voltage Inspection

Measure the output voltage with the engine stopped with the connector joined.
Connect the following parts to harness connectors temporarily.

ECU Intake Air Temperature Sensor
Turn the ignition switch to ON.
Measure the output voltage when the subthrottle valves are fully opened by hand.

Output Voltage Standard: DC 0.8 1.0 V at
subthrottle valve full close position (for reference) DC 4.28 4.32 V at subthrottle valve
full open position

NOTE

Open the subthrottle valves, confirm the output voltage will be raise.
The standard voltage refers to the value when the voltage reading at the Input Voltage Inspection shows 5 V exactly.
When the input voltage reading shows other than 5 V, derive a voltage range as follows. Example: In the case of a input voltage of 4.75 V.

0.8 × 4.75 ÷ 5.00 = 0.76 V 1.0 × 4.75 ÷ 5.00 = 0.95 V Thus, the valid range is 0.76 ∼ 0.95 V
Turn the ignition switch to OFF.

If the reading is out of the standard, check the subthrottle sensor resistance (see Subthrottle Sensor Resistance Inspection).

If the reading is within the standard, remove the ECU and check the wiring for continuity between harness connectors.

Special Tool - Hand Tester: 57001-1394

Disconnect the ECU and sensor connectors.

Wiring Continuity Inspection ECU Connector [A] ←→ Subthrottle Sensor Connector [B] BL/W lead (ECU terminal 12) [C] BR/BK lead (ECU terminal 13) [D]

Subthrottle Sensor Output Voltage Inspection

If the wiring is good, check the ECU for its ground and power supply (see ECU Power Supply Inspection in the Fuel System (DFI) chapter).

If the ground and power supply are good, replace the ECU (see ECU Removal/Installation in the Fuel System (DFI) chapter).

Subthrottle Sensor Input Voltage Inspection

NOTE Be sure the battery is fully charged. Turn the ignition switch to OFF. Remove the air cleaner housing (see Air Cleaner Housing Removal in the Fuel System (DFI) chapter) Disconnect the ...

Subthrottle Sensor Resistance Inspection

Turn the ignition switch to OFF. Disconnect the subthrottle sensor connector. Connect a digital meter [A] to the subthrottle sensor connector [B]. Measure the subthrottle sensor resistance. ...

Other materials:

Balancer Removal
Remove: Engine (see Engine Removal in the Engine Removal/Installation chapter) Oil Pan (see Oil Pan Removal in the Engine Lubrication System chapter) Remove: Balancer Shaft Clamp Lever Bolt [A] Balancer Shaft Clamp Bolt [B] Balancer Shaft Clamp Lever [C] Balancer Shaft [D] Bal ...

Stem, Stem Bearing Removal
Remove: Upper Fairing Assembly (see Upper Fairing Assembly Removal in the Frame chapter) Front Fender (see Front Fender Removal in the Frame chapter) Front Wheel (see Front Wheel Removal in the Wheels/Tires chapter) Steering Stem Head with Handlebars (see Handlebar Removal) Fron ...

Piston Ring Thickness Inspection
Measure the piston ring thickness. Use the micrometer to measure at several points around the ring. Piston Ring Thickness Standard: Top [A] 0.77 0.79 mm (0.0303 0.0311 in.) Second [B] 0.78 0.79 mm (0.0307 0.0311 in.) Service Limit: Top 0.70 mm (0.0276 in.) Second 0.71 mm (0.0280 ...