Characteristic curve of intake air
temperature sensor NTC resistor
Characteristic curve of
temperature sensor
Stepping motor ofidle speed actuator
- Intake air temperature sensor (4G18-3600090)
Intake air temperature sensor is a resistor with negative tem-
perature coefficient (NTC), resistance varies with intake air
temperature, and this sensor sends a voltage indicating change
of intake air temperature to controller.
Simple measuring method:
(Removing the joint) place digital universal meter at ohm gear,
and connect 2 terminals respectively to 1# pin and 2# pin of
sensor, and rated resistance at 5%, and
other corresponding resistance values could be measured ac-
cording to the characteristic curve in above drawing. Analog
method could also be applied in measurement. Use an elec-
tric blower to blow air into the sensor (pay attention not to
keep them too near), and observe the change of resistance,
which should decrease at the moment.
- Stepping motor (4G18-3600070)
Schematic diagram and pins
Engine control system·- EFI system
Use digital universal meter to measure:
Resistance-temperature characteristics of temperature sensor
11
Temperature range( Resistance at A and C
Resistance at B
