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

Special Tool - Measuring Adapter: 57001-1700

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

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


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


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:

Rear Caliper Holder Shaft Wear
The caliper body must slide smoothly on the caliper holder shafts [A]. If the body does not slide smoothly, one pad will wear more than the other, pad wear will increase, and constant drag on the disc will raise brake and brake fluid temperature. Check to see that the caliper holder shafts ar ...

Stopping the engine
Close the throttle completely. Shift the transmission into neutral Turn the ignition key to “OFF”. Support the motorcycle on a firm, level surface with the side stand. Lock the steering. NOTE The motorcycle is equipped with a vehicle-down sensor, which causes the engine to sto ...

Fuses
Fuses are arranged in the fuse boxes located under the passenger’s seat and in the left fairing. The main fuse is located under the passenger’s seat. If a fuse fails during operation, inspect the electrical system to determine the cause, and then replace it with a new fuse of proper amp ...