3-50 FUEL SYSTEM (DFI)
Inlet Air Temperature Sensor (Service Code 13)
Never drop the sensor, especially on a hard surface.
Such a shock to the sensor can damage it.
Remove the fuel tank (see Fuel Tank Removal).
Disconnect the connector [A] from the inlet air tempera-
Remove the screw [B].
Pull out the inlet air temperature sensor [C].
Put the inlet air temperature sensor into the air cleaner
Tighten the screw securely.
Output Voltage Inspection
Be sure the battery is fully charged.
The output voltage changes according to the inlet air
Remove the ECU (see ECU Removal). Do not disconnect
the ECU connectors.
Connect a digital voltmeter to the ECU connector, using
needle adapter set.
Special Tool - Needle Adapter Set: 57001-1457
Measure the sensor output voltage with the engine
stopped and the connector joined.
Turn the ignition switch ON.
Inlet Air Temperature Sensor Output Voltage
Connections to ECU Connector
Meter (+) → Y lead (terminal 26)
Meter (–) → BR/BK lead (terminal 28)
about 2.25 ∼ 2.50 V at inlet air temperature
Turn the ignition switch OFF.
If the output voltage is out of the standard, remove the
fuel tank and check the wiring. And if the output voltage
is 4.8 V, the ECU is normal.
If the output voltage is within the standard, check the ECU
for its ground, and power supply (see ECU Power Supply
If the wiring is good, check the sensor resistance.
Remove the needle adapter set, and apply silicone
sealant to the seals of the connector for waterproofing.
Silicone Sealant (Kawasaki Bond: 56019-120) - Seals
of ECU Connectors