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3-62 FUEL SYSTEM (DFI)
Inlet Air Temperature Sensor (Service Code 13)
If the output voltage is out of the specified, check the ECU
for its ground, and power supply (see ECU Power Supply
Inspection). If the ground and power supply are good,
replace the ECU (see ECU section).
If the output voltage is far out of the specified (e.g. when
the wiring is open, the voltage is about 4.6 V), check the
wiring (see wiring diagram in this section).
•
Remove the needle adapter set, and apply silicone
sealant to the seals of the ECU connector for waterproof-
ing.
Sealant - Kawasaki Bond (Silicone Sealant): 56019-120
If the wiring is good, check the sensor resistance.
Sensor Resistance Inspection
•
Remove the inlet air temperature sensor (see Re-
moval/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: 2.09 ∼ 2.81 kΩ at 20°C (68°F)
About 0.322 kΩ at 80°C (176°F) (reference
value)
If the measurement is out of the range, replace the sensor.
If the measurement is within the specified, replace the
ECU (see ECU section).
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