The limp home can be activated also by the ignition key. The ECM informs the driver by blinking the immobilizer indicator for the limp home condition. Then the user password can be input to ECM that can be done by special sequence of ignition on/off as below. 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.) start again. After ignition off the ECM is locked (If timer 8 sec. is elapsed). For next start the input of user password is requested again.