In-Vehicle Sensor Circuit

In-vehicle Sensor Circuit

COMPONENT DESCRIPTION




In-vehicle Sensor
The in-vehicle sensor is located on instrument lower panel. It converts variations in temperature of compartment air drawn from the aspirator into a resistance value. It is then input into the unified meter and A/C amp.







Aspirator
The aspirator is located on driver's side of heater & cooling unit. It produces vacuum pressure due to air discharged from the heater & cooling unit, continuously taking compartment air in the aspirator.

Diagnostic Procedure For In-Vehicle Sensor (Steps 1 - 2):

Diagnostic Procedure For In-Vehicle Sensor (Steps 3 - 4):

DIAGNOSTIC PROCEDURE FOR IN-VEHICLE SENSOR

SYMPTOM: In-vehicle sensor circuit is open or shorted.

COMPONENT INSPECTION







In-vehicle Sensor
After disconnecting in-vehicle sensor connector M42, measure resistance between terminals 1 and 2 at sensor harness side, using the table.
If NG, replace in-vehicle sensor.