Kia Rio: Limp Home Function - Immobilizer System - Body Electrical System - Kia Rio UB 2012-2019 Service ManualKia Rio: Limp Home Function

1.
Limp Home By Tester
If the ECM detects the fault of the Immobilizer or transponder, the ECM will allow limp home function of the immobilizer. Limp home is only possible if the user password (4 digits) has been given to the ECM before. This password can be selected by the vehicle owner and is programmed at the service station.
The user password can be sent to the ECM via the special tester menu.
Only if the ECM is in status "learnt" and the user password status is "learnt" and the user password is correct, the ECM will be unlocked for a period of time (30 sec.). The engine can only be started during this time. After the time has elapsed, engine start is not possible.
If the wrong user password is sent, the ECM will reject the request of limp home for one hour. Disconnecting the battery or any other action cannot reduce this time. After connecting the battery to the ECM, the timer starts again for one hour.





2.
Limp Home By Ignition Key
The limp home can be activated also by the ignition key. The user password can be input to the ECM by a special sequence of ignition on/off.
Only if the ECM is in status "learnt" and the user password status is "learnt" and the user password is correct, the ECM will be unlocked for a period of time (30 sec.).
The engine can be started during this time. After the time has elapsed, engine start is not possible. After a new password has been input, the timer (30 sec.) will start again.
After ignition off, the ECM is locked if the timer has elapsed 8 seconds. For the next start, the input of the user password is requested again.

Immobilizer Control Unit Removal


Teaching Procedures
1. Key Teaching Procedure Key teaching must be done after replacing a defective ECM or when providing additional keys to the vehicle owner. The procedure st ...

Immobilizer Control Unit Removal
1. Disconnect the negative (-) battery terminal. 2. Remove the crash pad lower panel. (Refer to the BD group - "Crash pad") ...

See also:

On-vehicle Inspection
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Specifications
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CVVT (Continuously Variable Valve Timing) System: Description
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