Kawasaki Ninja Service Manual: Intake Air Temperature Sensor Output Voltage Inspection

NOTE

Be sure the battery is fully charged.

• Turn the ignition switch to OFF.
• Remove the fuel tank (see Fuel Tank Removal in the Fuel System (DFI) chapter).
• Disconnect the intake air temperature sensor connector and connect the measuring adapter [A] between these connectors as shown in the figure.

  Main Harness [B] Intake Air Temperature Sensor [C]

Special Tool - Measuring Adapter: 57001-1700

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

Intake Air Temperature Sensor Output Voltage Connections to Adapter: Digital Meter (+) → R (sensor R/BK) lead Digital Meter (–) → BK (sensor BR/BK) lead

• Measure the output voltage with the engine stopped and the connector joined.
• Turn the ignition switch to ON.

Output Voltage Standard: About DC 2.44 ∼ 2.69 V at 25°C (77°F)

NOTE

The output voltage changes according to the intake air temperature.

• Turn the ignition switch to OFF.

If the reading is within the standard, 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).

If the reading is out of 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 Inspection ECU Connector [A] ←→ Intake Air Temperature Sensor Connector [B] R/BK lead (ECU terminal 37) [C] BR/BK lead (ECU terminal 13) [D]

If the wiring is good, check the intake air temperature sensor resistance (see Intake Air Temperature Sensor Resistance Inspection).