Heater Core Temperature Sensor
Removal
Disconnect the connector, remove the clamp and the
heater core temperature sensor.
CLAMP
HEATER CORE
TEMPERATURE
SENSOR
Compare the resistance reading between the terminals
of the heater core temperature sensor with specifica-
tions shown in the following graph: It should be within
specification.
NOTE: Dip the sensor in ice water, and measure the
resistance. Then pour hot water on the sensor, and
check for change in resistance.
CAUTION: The sensor uses a thermistor which
can be damaged if high current is applied to it
during testing. Therefore, use a circuit tester
that puts out a measuring current of 1 mA or
less.
Test
Removal
Disconnect the connector, remove the clamp and the
heater core temperature sensor.
CLAMP
HEATER CORE
TEMPERATURE
SENSOR
Compare the resistance reading between the terminals
of the heater core temperature sensor with specifica-
tions shown in the following graph: It should be within
specification.
NOTE: Dip the sensor in ice water, and measure the
resistance. Then pour hot water on the sensor, and
check for change in resistance.
CAUTION: The sensor uses a thermistor which
can be damaged if high current is applied to it
during testing. Therefore, use a circuit tester
that puts out a measuring current of 1 mA or
less.
Test