Climate Control Exhaust Gas Sensor: Testing and Inspection

INSPECTION




1. INSPECT COOLER SENSOR (SMOG VENTILATION THERMISTOR)
a. Connect the positive (+) lead from the battery to the terminal 4 (IG) and the negative (-) lead to terminal 1 (GND).
b. Apply battery positive voltage between terminals 1 and 4 for more than 30 seconds.




c. Measure the resistance of the cooler.

If the result is not as specified, replace the cooler.

HINT: When the cooler is exposed to the exhaust gas, the resistance goes down.