General Information

Component Location





General Description

When the TP sensor's signal indicates closed throttle position and the engine is idling, the ECM adjusts the idle speed control actuator so that the engine runs at the correct idling speed, regardless of coolant temperature, load and etc. When the additional load applied in the engine, the air flow through the idle speed control actuator is increased momentarily to raise the idling speed.

DTC Description

The temperature of catalyst has an effect on emissions. Also, the PCM estimates the temperature of catalyst by intake air mass. By the way, the intake air mass is controlled by ISCA during idling. So, if the Integral of intake air mass is below the threshold value, the PCM judges that ISCA doesn't work properly.

DTC Detecting Condition





Signal Waveform