Steering column lock: Description

WARNING: This page is about a different car, the 2005 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

The ignition is turned to OFF to lock the steering column. The column integration module (ICM) will then check that the speed is lower than 5 km/h. Beside the speed having to be below 5 km/h, the gear selector on cars with automatic transmission must be in position P. Once these conditions have been met, CIM will send signals to the ignition switch (ISM) to release the key, whereby the key can be turned to LOCK and then removed. It is at this point that the steering column will lock.

After inserting the key, the steering column lock (SCL) will be unlocked if the transponder is approved. If the car has been parked so that the steering column is straining hard on the lock bolt, it may not be possible to unlock the SCL. CIM will then send a message on the bus so that the infotainment system control panel (ICM) can instruct the driver via SID to remove the key, turn the steering wheel and insert the key again.