Kawasaki Ninja Service Manual: Vehicle-down Sensor Output Voltage Inspection

Kawasaki Ninja Service Manual / Self-Diagnosis System / Vehicle-down Sensor (Service Code 31) / Vehicle-down Sensor Output Voltage Inspection

Remove the vehicle-down sensor.
Connect the measuring adapter [A] to the vehicle-down sensor connectors as shown in the figure.

Special Tool - Measuring Adapter: 57001-1700

Main Harness [B] Vehicle-down Sensor [C]

Connect a digital meter [D] to the measuring adapter leads.

Vehicle-down Sensor Output Voltage Inspection

Vehicle-down Sensor Output Voltage Connections to Adapter: Digital Meter (+) → W (sensor Y/G) lead Digital Meter (–) → BK (sensor BR/BK) lead

Vehicle-down Sensor Output Voltage Inspection

Hold the sensor vertically.
Measure the output voltage with the engine stopped, and with the connector joined.
Turn the ignition switch to ON.
Tilt the sensor 60 70° or
more [A] right or left, then hold the sensor almost vertical with the arrow mark pointed up [B], and measure the output voltage.

Output Voltage Standard: With sensor tilted 60
70° or more right or left: DC 0.65 1.35 V
With sensor arrow mark pointed up: DC 3.55 4.45 V

Turn the ignition switch to OFF.

If the reading is out of the standard, replace the sensor.

Vehicle-down Sensor Output Voltage Inspection

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

Special Tool - Hand Tester: 57001-1394

Disconnect the ECU and sensor connectors.

Wiring Continuity Inspection ECU Connector [A] ←→ Vehicle-down Sensor Connector [B] Y/G lead (ECU terminal 38) [C] BR/BK lead (ECU terminal 13) [D]

Vehicle-down 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).

Vehicle-down Sensor Circuit

Vehicle-down Sensor Circuit

1. ECU

2. Vehicle-down Sensor

Vehicle-down Sensor Input Voltage Inspection

NOTE Be sure the battery is fully charged. Turn the ignition switch to OFF. Disconnect the vehicle-down sensor connector and connect the measuring adapter [A] between these connectors as sh ...

Subthrottle Sensor (Service Code 32)

The subthrottle sensor is a rotating variable resistor that change output voltage according to throttle operating. The ECU senses this voltage change and determines fuel injection quantity, and ign ...

Other materials:

Oil Cooler Installation
Replace the O-ring [A] with a new one. Apply grease to the new O-ring. Install the water hoses and hose clamps [A] as shown in the figure. Water Hose (About 300 mm, 11.8 in.) [B] Water Hose (About 130 mm, 5.1 in.) [C] Yellow Paint [D] Tighten: Torque - Water Hose Clamp S ...

Headlight Bulb Replacement
Turn the cover [A] counterclockwise, and remove it. Disconnect the headlight connector [A]. Open the clamp [B], and remove the bulb. NOTICE When handling the quartz-halogen bulb, never touch the glass portion with bare hands. Always use a clean cloth. Oil contamination from hand ...

Shifting Gears
Close the throttle while pulling in the clutch lever. Shift into the next higher or lower gear. Open the throttle part way, while releasing the clutch lever. For smooth riding, each gear position should cover the proper rate of speed shown in the table. WARNINGDownshifti ...