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Diagnostic Method

Judge as NG when Low side or High side becomes NG.

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

JUDGMENT VALUE CHART

Malfunction Criteria Threshold Value
Low   
Output voltage < 1.49 V (AT model)
  < 1.47 V (MT model)
Engine speed ≥ 2500 RPM (AT model)
  ≥ 2000 RPM (MT model)
Throttle opening angle ≥ 12 °
Intake manifold pressure ≥ 66.7 kPa (500 mmHg, 19.7 inHg)
High (1)   
Output voltage ≥ 2.66 V
Engine speed 600 RPM - 900 RPM
Throttle opening angle < 4.4 ° (AT model)
  < 3.6 ° (MT model)
Intake manifold pressure ≥ 40 kPa (300 mmHg, 11.8 inHg)
High (2)   
Output voltage ≥ 1.55 V (AT model)
  ≥ 1.45 V (MT model)
Engine speed 600 RPM - 900 RPM
Throttle opening angle < 4.4 ° (AT model)
  < 3.6 ° (MT model)
Intake manifold pressure ≥ 40 kPa (300 mmHg, 11.8 inHg)
Fuel system diagnosis Rich side malfunction

Time Needed for Diagnosis: 

Low: 5000 ms

High: 10000 ms

Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.

Judge as OK and clear the NG when both Low side and High side become OK.

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 CHART

Malfunction Criteria Threshold Value
Low   
Output voltage ≥ 1.49 V (AT model)
  ≥ 1.47 V (MT model)
Engine speed ≥ 2500 RPM (AT model)
  ≥ 2000 RPM (MT model)
Throttle opening angle ≥ 12 °
Intake manifold pressure ≥ 66.7 kPa (500 mmHg, 19.7 inHg)
High   
Output voltage < 2.66 V
Engine speed 600 RPM - 900 RPM
Throttle opening angle < 4.4 ° (AT model)
  < 3.6 ° (MT model)
Intake manifold pressure < 40 kPa (300 mmHg, 11.8 inHg)
Fuel system diagnosis Rich side normal

Time Needed for Diagnosis: 

Low: Less than 1 second

High: Less than 1 second