Denso CRS - Page 69

Operation Section
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64
(3) Intake Air Temperature Sensor
• The intake air temperature sensor detects the temperature of the intake air after it has passed the turbocharger. The
sensor portion that detects the temperature contains a thermistor. The thermistor, which has an electrical resistance
that changes with temperature, is used to detect the intake air temperature.
(4) Mass Airflow Meter (with Built-In Intake Air Temperature Sensor)
• The mass air flow meter is installed behind the air cleaner and detects the intake air flow (mass flow). This sensor is
a hot-wire type. Since the electrical resistance of the hot wire varies with the temperature, this characteristic is utilized
to measure the intake air quantity. The mass airflow meter also has a built-in intake air temperature sensor (thermistor
type) and detects the intake air temperature (atmospheric temperature).
(5) Coolant Temperature Sensor
• The coolant temperature sensor is installed on the cylinder block and detects the coolant temperature. This sensor is
a thermistor type.
Thermistor
Q000881E
Resistance
Temperature
Resistance -
Temperature
Characteristic
E2 THAF VG E2G +B
Temperature
Temperature
Characteristic
C
(
F
)
Intake Air
Temperature
Sensor
Hot Wire
Q000882E
Resistance
Intake Air Temperature
Sensor Resistance
-
Q000883E
Coolant Temperature
Resistance Value
+5V
VTHW
A-GND
ECU
Thermistor
Coolant Temperature
Sensor Resistance
Water Temperature
Characteristic
-