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IDLE AIR CONTROL OPERATION [AJ]

BME014000000T59

Corrections

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

Target speed

Load condition | P, N position | Except P, N position
--- | --- | ---
A/C operation | 700 | 700
During electrical load *1 | 685 | 685
Power steering operating | 750 | 750

  *1 :
When headlights, rear defroster, blower fan (level two or higher), cooling fan, and condenser fan are all operated.