DTC P1507 (ISC_SHI): Idle Control System Malfunction (Fail-Safe)
- Connect SSM. Retrieve DTC(s). If DTC P0505 exists, diagnose DTC P0505 . DO NOT diagnose DTC P1507. If no other DTCs exist, go to next step.
- Start engine. Check for vacuum leaks. Repair as needed. If no leaks are found, replace IAC solenoid valve.