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HO2S Heater

  1. Disconnect HO2S connector with ignition mode of keyless push start system in "OFF".
  2. Using ohmmeter, measure resistance of HO2S connector (sensor side) between terminals "3" and "4" at sensor connector.

    If faulty condition is found, replace HO2S, see A/F SENSOR AND HO2S REMOVAL AND INSTALLATION .

    NOTE: Sensor temperature affects resistance value largely. Make sure that sensor heater is at specified temperature.

    HO2S heater resistance 

    5.0 - 6.4 Ω at 20°C (68°F) 

    Fig 1: Identifying HO2S Connector Terminals
    G06528137Courtesy of SUZUKI OF AMERICA CORP.
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