#
IDLE AIR CONTROL (IAC) [WITH WU-TWC]

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## Outline

• The function of the IAC is essentially carried over from that of the previous Mazda2 (DY) without WU-TWC models except for the following:

  - Fuel economy has been improved due to the lowerd target idle speed and reduction of fuel consumption during idling.
  - To lower the target idle speed, a steering angle sensor has been adopted, and the target idle speed is set according to the steering angle (0 °-60 °-180 °-) and the P/S load.

## Target Engine Speed

Condition | Idle speed (rpm)
--- | ---
ATX | MTX
P, N position | Except P, N position
No load | After the sensor detects the steering angle*1 | Steering angle is less than 60 ° | 650-750 | 540-640 | 600-700
Steering angle is above 60 ° | 650-750 | 600-700 | 650-750
Before the sensor detects the steering angle*1
A/C on | Low load*2 | 650-750 | 600-700 | 650-750
High load*3 | 700-800
Electrical load is on.*4 | 30-40 A | 650-750 | 600-700 | 650-750
above 40 A | 700-800
P/S on | After the sensor detects the steering angle*1 | Steering angle is less than 180 ° | 650-750 | 600-700 | 650-750
Steering angle is above 180 ° | 700-800
Before the sensor detects the steering angle*1

  *1 :
The steering angle will be cleared if the ignition switch is turned off. The sensor detects the steering angle after the ignition switch is turned to the ON position and the vehicle is driven straight at a vehicle speed of 20 km/h {12 mph} or more.
  *2 :
Refrigerant pressure switch (middle pressure) is off.
  *3 :
Refrigerant pressure switch (middle pressure) is on.
  *4 :
Generator generating current value