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Operation condition
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A/C relay non-energization period
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Purpose
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At engine start
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Approx. 4 s
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Improved startability
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At drive-away
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Approx. 3 s
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Improved drive-away performance
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During acceleration (throttle valve opening angle 50% or more)
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Approx. 5 s
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Improved acceleration performance
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When engine coolant temperature is 113°C {235°F}.
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Repeatedly turns on and off every 10 s until the engine coolant temperature is less than approx. 107°C {225°F}
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Improved engine reliability
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Engine coolant temperature is 117°C {243°F} or more.
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Until engine coolant temperature is less than 110°C {230°F}.
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Improved engine reliability
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At high engine speed
(engine speed 5,710 or more)
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Until engine speed decreases to less than 5,210 rpm
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Improved A/C compressor reliability
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When temperature in PCM is fixed or more
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-
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PCM protection
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When evaporator temperature sensor is less than 4°C {39°F}
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Until evaporator temperature sensor is 4°C {39°F} or more
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To prevent blocking the air passing through evaporator due to freezing of dripping water.
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