Kawasaki Ninja Service Manual: 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 Connections to Adapter: Digital Meter (+) → W (sensor Y/G) lead Digital Meter (–) → BK (sensor BR/BK) lead

• 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.

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]

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

1. ECU

2. Vehicle-down Sensor