3-56 FUEL SYSTEM (DFI)
Water Temperature Sensor (Service Code 14)
Water Temperature Sensor Removal/Installation
Never drop the sensor, especially on a hard surface.
Such a shock to the sensor can damage it.
Drain the coolant (see Coolant Change in the Periodic
Remove the throttle body assy (see Throttle Body Assy
Water Temperature Sensor [A]
Apply silicone sealant to the threads of the water temper-
ature sensor and tighten it.
Sealant - Kawasaki Bond (Silicone Sealant): 56019-120
Torque - Water Temperature Sensor: 25 N·m (2.5 kgf·m, 18
Fill the engine with coolant and bleed the air from the cool-
ing system (see Coolant Change in the Periodic Mainte-
Water Temperature Sensor Output Voltage Inspection
Be sure the battery is fully charged.
Remove the ECU (see ECU Removal). Do not disconnect
Connect a digital voltmeter [A] to the ECU connectors [B],
with the needle adapter set.
Special Tool - Needle Adapter Set: 57001-1457
Water Temperature Sensor Output Voltage
Connections to ECU
Meter (+) → O lead (terminal 9)
Meter (–) → BR/BK lead (terminal 28)
Measure the sensor output voltage with the engine
stopped and the connector joined.
Turn the ignition switch ON.
Output Voltage at ECU
Standard: About 2.80 ∼ 2.97 V at 20°C (68°F)
The output voltage changes according to the coolant
temperature in the engine.