HO2S Heater Resistance Inspection

Disconnect the HO2S (front or rear) connector.
Measure the resistance between the following HO2S terminals.
- HO2S (Front, RH) and HO2S (Rear, RH)
  - Terminal C and D
- HO2S (Front, LH) and HO2S (Rear, LH)
  - Terminal C and D
- If not as specified, replace the HO2S.
- If the HO2S heater is okay, but PID value or any of PCM terminal 94, 93, 95, 96 voltage are out of specification, perform Circuit Open/Short Inspection .
Specification

Front (RH, LH): 5.0-6.8 ohms

Rear (RH, LH): 14.1-18.9 ohms