Diagnostic Method

• Abnormality Judgment 

  If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

  Judgment Value 

  JUDGMENT VALUE
  
  

  Malfunction Criteria	Threshold Value
  Battery voltage	≥ 10.9 V
  Time of heater control duty at 70 % or more	≥ 36000 ms
  Front oxygen (A/F) sensor impedance.	> 500 Ω

  Time Needed for Diagnosis:  5000 ms

  Malfunction Indicator Light Illumination:  Illuminates as soon as a malfunction occurs.

• Normality Judgment 

Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.

Judgment Value 

Time Needed for Diagnosis:  Less than 1 second