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. It produces vacuum pressure due to air discharged from the heater & cooling unit continuously taking compartment air in the aspirator.

Diagnostic Procedure Step 1 - 3:

Diagnostic Procedure Step 4:

DIAGNOSTIC 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.)

COMPONENT INSPECTION







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