Fault criteria, fuel system
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Fault criteria, fuel system
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If closed loop or adaptation reaches a limit, a fault is considered to be present in the fuel system.
Fault criteria for closed loop are fulfilled when conditions for diagnosis are fulfilled and closed loop has been at its limit for longer than 20 seconds.
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Conditions for diagnosis of closed loop
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•
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Global adaptation performed during the driving cycle
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Conditions for diagnosis of adaptation:
ignition switch in ON position
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1.
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Closed loop > 25% for 20 sec.
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2.
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Fault criteria for closed loop fulfilled
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3.
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Closed loop < -25% for 20 sec.
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1.
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Global adaptation > 100%
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2.
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Fault criteria for adaptation fulfilled
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3.
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Global adaptation < - 100%
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