In-Vehicle Sensor Circuit

In-vehicle Sensor Circuit

COMPONENT DESCRIPTION




In-vehicle Sensor
The in-vehicle sensor is located on instrument driver 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 assembly. It produces vacuum pressure due to air discharged from the heater & cooling unit assembly, continuously taking compartment air in the aspirator.

DIAGNOSIS PROCEDURE FOR IN-VEHICLE SENSOR




SYMPTOM: In-vehicle sensor circuit is open or shorted. (22 or -22 is indicated on unified meter and A/C amp. as a result of performing self-diagnosis STEP-2.)

Step 1-2:

Step 2 (Continued)-4:

COMPONENT INSPECTION

In-vehicle Sensor
After disconnecting in-vehicle sensor connector M54, measure resistance between terminals 1 and 2 at sensor side. Refer to the table below.






If NG, replace in-vehicle sensor.