Diagnostic Method

Calculate the Max. value (delfimax) and cumulative value (sumfl) of output voltage variation of fuel level sensor during 12.24 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: Output Voltage Blinking Patterns

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• Abnormality Judgment 

  Judge NG when the malfunction criteria below are completed.

• Judgment Value 
  Fig 2: Threshold Valve Table

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  Do not count the diagnosis counter up when the following conditions are completed during 12.3 seconds.

  Fig 3: Conditions Table

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  Time Needed for Diagnosis:  12.2 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: Threshold Valve Table

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