Heated Oxygen Sensor (Sensor-1 and Sensor-2) Inspection

Reference: HEATED OXYGEN SENSOR (SENSOR-1 AND SENSOR-2) REMOVAL AND INSTALLATION 

1. Disconnect sensor connector (1).
2. Using ohmmeter, measure resistance between terminals "V_B " and "GND" of sensor connector.

   If found faulty, replace oxygen sensor.

   Resistance of oxygen sensor heater 

   Sensor-1: 2 - 6 ohm at 20 °C, 68 °F 

   Sensor-2: 4 - 10 ohm at 20 °C, 68 °F 

3. Connect sensor connector securely.
   Fig 1: Checking Resistance Between Terminals VB And GND Of Sensor Connector

   Courtesy of SUZUKI OF AMERICA CORP.