Diagnostic Method

Calculate the Max. value (delflmax) and cumulative value (sumfl) of output voltage variation of fuel level sensor during 10.2 seconds. Judge it normal when both max. and cumulative values are not over the threshold value. Otherwise, when either of them is over the threshold value, count the diagnosis counter up. And judge NG if the counter indicated 4 counts.

Fig 1: Fuel Lever Sensor Diagnostic Timer Graph

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• Abnormality Judgment 

Judge NG when the malfunction criteria below are completed.

• Judgment Value 
  Fig 2: Abnormality Judgment Value Table

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Do not count the diagnosis counter up when the following conditions are completed during 10.2 seconds.

Fig 3: Minimum & Maximum Tank Pressure & Voltage Table

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Time Needed for Diagnosis:  10.2 seconds x 4 times

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

• Normality Judgment 

Judge OK and clear the NG when the malfunction criteria below are completed.

• Judgment Value 

Fig 4: Normality Judgment Value Table

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