Idle Speed Control

Idle speed is controlled by the SMEC through the Automatic Idle Speed (AIS) motor. The AIS is mounted on the throttle body assembly. The SMEC uses sensor input to determine optimum engine idle speed for any idle condition.

The AIS receives control signals from the SMEC to adjust the amount of air allowed through the air by-pass in the throttle body. This by-pass is enlarged or restricted, as an increase or decrease in engine idle speed is required, to meet various conditions. The SMEC uses sensor input to determine optimum engine idle speed for any idle condition.

The AIS receives control signals from the SMEC to adjust the amount of air allowed through the air by-pass in the throttle body. This by-pass is enlarged or restricted, as an increase or decrease in engine idle speed is required, to meet varying engine operating conditions. The SMEC also monitors A/C operation and transaxle lever position. When necessary, the SMEC issues commands to the AIS to increase idle speed under these load conditions.