Diagnostic Method

Check the engine coolant temperature (A/D value) when the radiator fan is ON since the radiator fan output turns from OFF to ON with all of the malfunction conditions below completed.

Fig 1: Enable Condition Table (2 Of 2)

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Judge NG when the cumulative time until completing the malfunction criteria below becomes more than the time (5 minutes) needed for diagnosis. Also Judge OK when the malfunction criteria below is not completed. And then clear NG.

Judgment Value 

Fig 2: Threshold Value Table

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Fig 3: Engine Coolant Temperature Graph

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1. Time Needed for Diagnosis:  5 minutes
2. Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.