P80.57-A003-79
1 | Electrical steering column lock control unit |
Overview
This document contains information on:
General
Function requirements
Function
General
The electric steering column lock control unit determines the locking status of the steering column and activates unlocking or locking of the steering column.
Function requirements
Electronic ignition lock control unit active
Ignition OFF (circuit 15C)
Wheel pulse counter = 0
Function
The electrical steering column lock control unit processes the information from the electronic ignition lock control unit and has two supply lines, both from the Supplemental Restraint System control unit and from the central controller unit.
The electrical steering column lock control unit performs the following functions:
Calculation of the hash value for checking the validity of the transmitter key
If the hash value is incorrect and the unlocking position is not reached or detected, a fault message is sent to the electronic ignition lock control unit
Position monitoring of locking bolt via two switching contacts
Switching on integrated motor via alternating relay for locking and unlocking locking bolt
Arresting steering column with locking bolt
The electrical steering column lock can only move the locking bolt in the lock direction if both supply lines are active. The electronic ignition lock control unit must request that the corresponding line is switched to active..