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Climate Control Exhaust Gas Sensor: Testing and Inspection





AIR CONDITIONING: SMOG VENTILATION SENSOR: 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.

Standard resistance:





(c) IF the result is not as specified, replace the cooler.

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