Limp Home Function - I

LIMP HOME FUNCTION




1. LIMP HOME BY TESTER
The ECM provides a "limp home" function, for the immobilizer, which allows starting the engine in cases where the ECM detects a SMARTRA or transponder fault. Limp home mode is only possible if the user password (4 digits) has been programmed into the ECM prior to the fault. This 4 digit password can be selected by the vehicle owner and programmed into the ECM by the dealer service representative. The user password is sent to the ECM via the special tester menu.

Starting the engine. (Read completely prior to attempting vehicle start).
The ECM must be in "learnt" status and the user password must be correct to start the vehicle.

A. If the "learnt" password is correct the ECM will be unlocked, and the engine started for a period of 30 seconds. Once the 30 seconds has elapsed the vehicle WILL NOT start.
B. If the password, sent to the ECM, is incorrect, the "limp home" request will be rejected for a period of 1 hour.

NOTE:
The The one-hour timer limitation cannot be reduced by any user actions.
For instance if the battery is disconnected and reconnected during this period, the one-hour timer will restart.

2. LIMP HOME BY IGNITION KEY
The "limp home" mode can also be activated using the ignition key. The user password can be input to the ECM by using a special ignition sequence (ON/OFF).

If the "learnt" password is correct the ECM will be unlocked, and the engine started for a period of 30 seconds. Once the 30 seconds has elapsed the vehicle WILL NOT start.

NOTE:
After a new password has been input, the timer (30 sec.) will start again.

If the ignition is turned OFF for a period of 8 seconds, the ECM will once again be locked. To restart the vehicle after the 8 second period the user password will once again be required.

NOTE:
KIA recommends setting the User Password when the car is initially sold. Auto-theft can easily occur since a secure user password has not been set allowing the vehicle limp to the wrong home.