DTC 507 (ISC_H) - Idle Control System Rpm Higher Than Expected

NOTE: Refer to illustration for connector and terminal identification. See Figure -Figure .

Perform tests and repairs for DTC P0505, clear codes and retest.
Turn ignition to ON. Start engine and allow to idle. Check intake manifold, idle air control solenoid valve and throttle body for loose installation and gasket for cracks, by-pass hose for loose connection or cracking and vacuum hoses for disconnection or cracking. Repair as necessary. If no damage is noted, replace idle air control solenoid valve.