Electronic Steering Column Lock Control Unit - Volkswagen Passat 2006 Service Training

Electrical system design and function
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Onboard Power Supply

Electronic Steering Column Lock Control Unit

Control unit
The electronic steering column lock is supplied
with power by the convenience central control
unit J393. Locking and unlocking as well as
diagnosis is controlled with the convenience
system central control unit via a serial data bus
connection.
To take the increased safety requirements into
account, the electronic steering column lock
release needs to be authorised by three separate
control units.
Lock/unlock
The following conditions need to be met:
An authorised key needs to be recognised by
the immobilizer.
Data bus diagnostic interface J533
(speed = 0 km/h; revs = 0 rpm)
Steering column electronics control unit J527
(terminal 15 off; speed = 0 km/h)
The electronic steering column only unlocks when an authorised key is recognised by the
immobilizer.
Terminals 15 and 50 are only activated once the electronic steering column lock has been
released.
46
Convenience system central control unit J393
(terminal 15 off; CAN signals from J533 and
J527 OK)
Entry and start authorisation switch E415
(S contact off, terminal 15 off)
Electronic steering column lock control unit
J764
(checks whether both speed signals from J533
and J527 are OK)
S340_047

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