Electronic Steering Lock E60, E61, E63, E64 From 09/2005 And E87, E90, E91

Installation location 

>E60, E61, E63, E64 from 09/2005

Fig 1: Locating Electronic Steering Lock Components: E60, E61, E63, E64 From 09/2005

Courtesy of BMW OF NORTH AMERICA, INC.

The electronic steering lock is located directly on the steering column. On vehicles with electric steering column adjustment, the electronic steering lock has a different installation location.

> E87, E90, E91

Fig 2: Locating Electronic Steering Lock Components: E87, E90, E91

Courtesy of BMW OF NORTH AMERICA, INC.

Construction 

The electronic steering lock comprises the following components:

Fig 3: Identifying Electronic Steering Lock Components

Courtesy of BMW OF NORTH AMERICA, INC.

How It Works 

During the unlocking procedure, an authentication procedure takes place between the Car Access System (CAS) and the electronic steering lock (ELV). The electronic steering lock is only able to start unlocking if the authentication process is completely with a positive outcome. For safety reasons, no current is applied to the electronic steering lock while the vehicle is being driven. The electronic steering lock is only supplied with power for the unlocking procedure or locking procedure.

To unlock the electronic steering lock: 

The unlocking procedure starts when terminal R is switched on. When a valid access authorization is detected, the CAS initiates the process of unlocking the electronic steering lock.

First, the CAS switches the electronic steering lock on. The vehicle's condition and the status of the electronic steering lock are then checked. Finally, the encoded signal is sent to release the lock. Once it has received the valid authorization, the electronic steering lock initiates the unlocking procedure. The electronic steering lock drive is actuated to "unlock".

The motor actuates a driver via a single-stage spur gear. The driver pulls the locking pins towards the unlocked position until the locking lever engages. The end position of the locking lever is detected by the Hall sensor. The motor stops when the electronic steering lock detects the "unlocked and deadlocked". This status is sent to the CAS via the K-CAN. The CAS interrupts the power supply. In the current-free state, the locking lever is locked automatically.

Start enable by Car Access System 

The start enable is issued by the CAS control unit. A start enable is only issued once the plausibility check has been carried out successfully. The CAS control unit must detect the "unlocked and deadlocked" status without errors. In order to start the engine, the CAS must have disconnected the electronic steering lock power supply.

Unlocking with Comfort Access 

On vehicles with Comfort Access, the remote control is also an ID transmitter. A valid ID transmitter must be detected inside the vehicle for the electronic steering lock to be unlocked.

To lock the electronic steering lock: 

When all conditions for locking have been met, the CAS initiates the locking procedure. The CAS switches the power supply to the electronic steering lock on and checks its status. When the status has successfully been validated, the CAS sends the lock enable signal to the electronic steering lock. The locking procedure is started. The motor actuates a driver via a single-stage spur gear. The driver pulls the locking bolt in to the lock position until the locking lever engages. The end position of the locking lever is registered by the Hall sensor. The motor stops when the electronic steering lock detects the "not unlocked and deadlocked".

This status is sent to the CAS via the K-CAN. The CAS interrupts the power supply. When no current is applied, the locking lever is automatically locked.

If the electronic steering lock has already been locked correctly, a locking procedure is not carried out. The electronic steering lock sends the current status to the CAS control unit again.

The ELV can only be locked if the vehicle is stationary 

The again can only be locked if the following signals indicate that the vehicle is stationary:

• Road speed signal on serial interface
• Signal about vehicle operating conditions on CAN bus

Both signals must indicate that the vehicle is stationary. This plausibility check only takes place for the locking procedure.

Locking with Comfort Access 

With Comfort Access, the vehicle is locked when the sensitive area on the outer door handle is touched. The electronic steering lock then also locks.

On vehicles with Comfort Access, the electronic steering lock locks if the engine has been started and the following conditions are satisfied:

• Terminal 15 OFF
• Central double-locking via outside door handle electronics

If the engine has been started, the electronic steering lock will lock after terminal R has been switched OFF and a door opened.