Diagnostic Trouble Codes (DTCs)

Diagnostic Trouble Codes (DTCs) indicate that IPC has detected a malfunction in a circuit or other system. IPC is programmed with routines for internal checks that it follows only when prescribed test conditions exist. When these conditions exist, IPC checks certain circuits or systems for a malfunction. These checks are called failure conditions. When a failure condition is present, a DTC is set. Some DTCs alert the driver through a Driver Information Center (DIC) message. Other DTCs do not trigger a driver warning. DTCs are not stored in the IPC EEPROM and are not retained after battery is disconnected.