Component description for the electronic ignition lock control unit

P80.57-2198-04

Location

The electronic ignition lock control unit is located on the right, next to the steering column.

Task

The electronic ignition lock control unit has the following tasks:

 Reading in of signals

 Evaluation of input factors

 Controlling functions

 Actuation of components

 Power supply for transmitter key (A8/1)

 Interface to KEYLESS-GO control unit (N69/5) (with code (889) Keyless Go)

Reading in of signals

The input factors are read in via the following connections:

 Direct line

 Interior CAN (CAN B)

 Chassis CAN (CAN E) (up to 31.05.2013)

 Chassis CAN 1 (CAN E1) (as of 01.06.2013)

Direct line

The following signals are read in via a direct line:

 Terminal 30

 Circuit 30b (emergency battery supply)

 Status of left front door lock (A85)

Interior CAN

The signals are read in by the electronic ignition lock control unit via the interior CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Chassis CAN (up to 31.05.2013)

The signals are read in by the electronic ignition lock control unit via the chassis CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Chassis CAN 1 (as of 01.06.2013)

The signals are read in by the electronic ignition lock control unit via the chassis CAN 1.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Controlling functions

The electronic ignition lock control unit actuates the following functions:

 Central locking (ZV)

 Convenience feature (CF)

 Drive authorization system stage 3 (DAS 3) (up to 31.05.2013)

 Drive authorization system stage 4 (DAS 4) (as of 01.06.2013)

Actuation of components

The actuation of the components takes place via the following connections:

 Direct line

 Interior CAN

 Chassis CAN (up to 31.05.2013)

 Chassis CAN 1 (as of 01.06.2013)

Direct line

The electronic ignition lock control unit communicates via a bi-directional serial data line with the electric steering lock control unit (N26/5).

Interior CAN

The signals are transmitted to the electronic ignition lock control unit via the interior CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Chassis CAN (up to 31.05.2013)

The signals are transmitted to the electronic ignition lock control unit via the chassis CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Chassis CAN 1 (as of 01.06.2013)

The signals are transmitted to the electronic ignition lock control unit via the chassis CAN 1.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Power supply for transmitter key

When the transmitter key is inserted into the electronic ignition lock control unit, it switches on the inductive power transmission for power supply to the transmitter key.

Interface to KEYLESS-GO control unit (with code (889) KEYLESS-GO)

The electronic ignition lock control unit forms the interface to the KEYLESS-GO control unit via the interior CAN for the KEYLESS-GO access and KEYLESS-GO operation. The KEYLESS-GO start/stop button (S2/3) inserted into the key opening, is read in directly by the electronic ignition lock control unit.