Failsafe Functions (Backup For Limp Home)

In case of a discharged battery of the SMART KEY FOB or disturbed transmission the following functions are available:

• Unlocking/locking of doors or trunk (or tailgate depending of the vehicle configuration) : use of mechanical key.
• Release of the steering column : The SMART KEY FOB has to contain the transponder functionality. To release the steering column and to start the engine the driver has to insert the SMART KEY FOB into the MSL and then the driver has to push the MSL Knob. When the SMK ECU detects the active MSL Knob Push Switch and the active Key-In contact, it sends a command to the MSL to start a transponder authentication. The MSL communicates via the transponder antenna with the transponder. When the transponder code is correct the MSL releases the ignition switch.
• Engine Start: To start the engine the driver turns the rotary knob to 'IGN' (ignition) position. The EMS sends an immobilizer challenge to the SMK ECU which responds with a 'go' or a 'no go'. The EMS gives the definite release to start the engine.