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Correction
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Purpose
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Condition
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Amount of correction
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A/C load correction
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Prevent drop in engine speed during A/C operation
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A/C operation
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A/C operation → correction
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P/S load correction
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Prevent drop in engine speed during P/S operation
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P/S operation
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P/S operation → correction
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Electrical load correction
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Prevent drop in engine speed during operation of electrical loads
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Idling or driving
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Electrical load increases → correction increases
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Fuel cut recovery decrease correction
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Reduce shock during fuel cut recovery
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In deceleration fuel cut zone, decrease by set amount
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In deceleration fuel cut zone → correction by set amount
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Accelerate warm up correction
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Accelerate activation of catalytic converter
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Idling when engine speed >1,000 rpm and atmospheric pressure > 72.0 kPa {540 mmHg, 21.3 inHg}, according to ECT
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ECT decreases → correction increases
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D range correction
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Prevent drop in engine speed during shift into D position
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Input of D range signal (TR switch)
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Difference between engine speed and turbine speed signal decreases → correction increases
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Dashpot correction
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Prevent drop in engine speed caused by insufficient air during deceleration
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Deceleration
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Engine speed increases → correction increases
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Starting correction
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Prevent drop in engine speed during starting
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Cranking or just after engine start
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ECT decreases → correction increases
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Warm restart correction
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Prevent drop in engine speed during warm restarting
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Cranking when ECT above 60 °C {140 °F}
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IAT above 50 °C {122 °F} → increases correction
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Closed loop correction A
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Make engine speed approach target engine speed
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Engine speed while idling (vehicle stopped) deviates from target engine speed (with engine speed above 300 rpm)
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Below target engine speed → increase correction
Above target engine speed → decreased correction
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Closed loop correction B
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When engine speed drops, make engine speed approach target engine speed in zone where closed loop correction A cannot compensate
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Engine speed below target engine speed during deceleration (with engine speed above 300 rpm) and when closed loop correction A not active
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Difference between engine speed and target engine speed increases → correction increases
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Learning correction
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Store change in air intake amount caused by differences in each engine and secular change and gives closed loop
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Idling when ECT above 70 °C {158 °F} and IAT below 75 °C {167 °F} (during closed loop correction A)
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During idling → average value of closed loop correction A
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