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

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	MTX
No load	After the sensor detects the steering angle^*1	Steering angle is less than 60 °	650-750	540-640	600-700
	After the sensor detects the steering angle^*1	Steering angle is above 60 °	650-750	600-700	650-750
	Before the sensor detects the steering angle^*1		650-750	600-700	650-750
A/C on		Low load^*2	650-750	600-700	650-750
A/C on		High load^*3	700-800
Electrical load is on.^*4		30-40 A	650-750	600-700	650-750
Electrical load is on.^*4		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
	After the sensor detects the steering angle^*1	Steering angle is above 180 °	700-800
	Before the sensor detects the steering angle^*1		700-800

^*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