Enhanced Testing

P1505 - Idle Charge Actuator Signal Low of Coil #1






Function
The Idle Air Control(IAC) valve is installed on the intake manifold. The IAC valve controls the intake airflow that is bypassed around the throttle plate to keep constant engine speed when the throttle valve is closed. The function of the IAC valve is to maintain idle speed according to various engine loads and conditions, and also to provide additional air during starting. The IAC valve consists of an opening coil, a closing coil, and a permanent magnet. Based on information from various sensors, the ECM controls both coils by grounding their control circuits. According to the control signals from the ECM, the valve rotor rotates to control the by pass airflow into the engine.

DTC Description
ECM sets DTC P1505 if the ECM detects that the IAC(OPEN) control line is open or short to ground.


Detecting Condition and Specifications





Wiring Schematic