Circuit Description

The idle speed control (ISC) assembly is a throttle body with an integrated motor that is used to control the engine speed at idle. The engine control module (ECM) commands the integrated ISC motor to adjust the throttle angle for idle speed control. The ECM uses a high control circuit and a low control circuit to command the ISC motor. The ECM detects the adaptation value exceeds the throttle position (TP) sensor or the idle speed control (ISC) position sensor values, this DTC sets.