Inlet Air Pressure Sensor Circuit

1. ECU

2. Water-proof Joint E

3. Water-proof Joint D

4. Inlet Air Pressure Sensor

Inlet Air Temperature Sensor (Service Code 13)

Inlet Air Temperature Sensor Removal/Installation

_• Remove the fuel tank (see Fuel Tank Removal).

_• Disconnect the connector [A] from the inlet air tempera-

ture sensor.

_• Remove the screw [B].

_• Pull out the inlet air temperature sensor [C].

_• Put the inlet air temperature sensor into the air cleaner

housing.

_• Tighten the screw securely.

Inlet Air Temperature Sensor Output Voltage Inspection note

○^{Be sure the battery is fully charged.}

○^{The output voltage changes according to the inlet air}

temperature.

_• 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)

Standard: About 2.25  2.50 V at inlet air temperature 20°C (68°F)

_• 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 Inspection).

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.

Sealant - Kawasaki Bond (Silicone Sealant): 56019-120

Inlet Air Temperature Sensor (Service Code 13)

Inlet Air Temperature Sensor Resistance Inspection

_• Remove the inlet air temperature sensor (see Inlet Air

Temperature Sensor Removal/Installation).

_• Suspend the sensor [A] in a container of machine oil so that the heat-sensitive portion is submerged.

_• Suspend a thermometer [B] with the heat-sensitive por-

tion [C] located in almost the same depth with the sensor.

NOTE

○^{The sensor and thermometer must not touch the con-}

tainer side or bottom.

_• Place the container over a source of heat and gradually raise the temperature of the oil while stirring the oil gently

for even temperature.

_• Using a digital meter, measure the internal resistance of the sensor across the terminals at the temperatures

shown in the table.

Inlet Air Temperature Sensor Resistance Standard: 5.4  6.6 kΩ at 0°C (68°F)

0.29  0.39 kΩ at 80°C (176°F)

If the measurement is out of the range, replace the sensor. If the measurement is within the specified, replace the ECU.

Inlet Air Temperature Sensor Circuit

1. ECU

2. Inlet Air Temperature Sensor

3. Water-proof Joint E

Water Temperature Sensor (Service Code 14)

Water Temperature Sensor Removal/Installation

_• Drain the coolant (see Coolant Change in the Periodic Maintenance chapter).

_• Remove the left center fairing (see Center Fairing Re-

moval in the Frame chapter).

_• Disconnect the sensor connector [A], and unscrew the water temperature sensor [B].

Torque - Water Temperature Sensor: 12 N·m (1.2 kgf·m, 106 in·lb)

_• Apply grease to new O-ring on the water temperature sen-

sor.

_• Fill the engine with coolant and bleed the air from the cool- ing system (see Coolant Change in the Periodic Mainte-

nance chapter).

Water Temperature Sensor Output Voltage Inspection

NOTE

○^{Be sure the battery is fully charged.}

_• Remove the ECU (see ECU Removal). Do not disconnect the connectors.

_• Connect a digital voltmeter [A] to the ECU connector [B] with the 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.

Water Temperature Sensor Output Voltage Connections to ECU

Meter (+) → O lead (terminal 20) Meter (–) → BR/BK lead (terminal 28)

Standard: About 2.80  2.97 V at 20°C (68°F)

NOTE

○^{The output voltage changes according to the coolant}

temperature in the engine.

_• Turn the ignition switch OFF.

If the output voltage is within the standard, check the ECU

for its ground, and power supply (see ECU Power Supply Inspection).

If the output voltage is out of the standard, check the wiring. And if the output voltage is 4.8 V, the ECU is nor- mal.

If the wiring is good, check the water temperature sensor resistance.

_• Remove the needle adapter set, and apply silicone

sealant to the seals of the connector for waterproofing.

Sealant - Kawasaki Bond (Silicone Sealant): 56019-120