1C
Heated Oxygen Sensor (HO2S-1 and HO2S-2) Heater On-Vehicle Inspection
1) Disconnect sensor connector.
2) Using ohmmeter, measure resistance between terminals “VB” and “GND” of sensor connector.
If found faulty, replace oxygen sensor.
NOTE:
Temperature of sensor affects resistance value largely. Make sure that sensor heater is at correct temperature.
Resistance of oxygen sensor heater
HO2S-1: 5.0 – 6.4 Ω at 20 °C (68 °F)
HO2S-2: 11.7 – 14.3 Ω at 20 °C (68 °F)
Viewed from terminal side
1. Viewed from terminal side
3) Connect sensor connector securely.