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Operation condition
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Time period for A/C relay power stop
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Purpose
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At engine start
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Approx. 4 s
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Improve startability
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Drive from standing start
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Approx. 3 s
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Improve standing start ability
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During acceleration
(throttle valve opening angle 50% or more)
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Approx. 5 s
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Improve acceleration ability
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Engine coolant temperature approx. 113°C {235°F}
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Switches on and off every 10 s until engine coolant temperature is less than approx. 107°C {224°F}.
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Improve engine reliability
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Engine coolant temperature approx. 117°C {243°F}
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Until the engine coolant temperature drops to less than approx. 110°C {230°F}
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Improve engine reliability
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High engine speed
(engine speed 5,710 rpm or more)
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Until engine speed drops to 5,210 rpm or less
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Improve reliability of A/C compressor
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During P/S operation (idling)
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Until P/S stops
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Improve idling stability
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PCM internal temperature higher than specified value
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-
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PCM protection
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Evaporator temperature less than 4°C {39°F}*1
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Until evaporator temperature rises to 4°C {39°F} or more
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To prevent shut off of airflow through the evaporator passage by frozen water droplets
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