Component description for the electronic ignition lock control unit

Networking

On vehicles as of model year 2016 there are two variants of chassis CAN (CAN E).

Variant 1:

If the vehicle does not include one of the equipment codes mentioned in variant 2, only one chassis CAN is still present.

Version 2:

If the vehicle includes one of the following equipment codes, one chassis CAN 1 (CAN E1) and one chassis CAN 2 (CAN E2) are present:

 Code 218 (Backup camera)

 Code 234 (Blind Spot Assist)

 Code 459 (Steel suspension with adjustable damping)

 Code 475 (Tire pressure monitor)

 Code 476 (Lane Keeping Assist)

 CODE 513 (Traffic sign assist)

 Code 614 (Bi-xenon headlamps)

 CODE 615 (Bi-xenon headlamp with active curve light)

 CODE 618 (Bi-xenon headlamp)

 Code 621 (Intelligent Light System (left-hand traffic))

 CODE 622 (Intelligent Light System)

 Code 631 (Static LED headlamps for left-hand traffic system)

 Code 632 (Static LED headlamps for right-hand traffic system)

The following text differentiates between version 1 and version 2. Vehicles up to model year 2016 are assigned to variant 1.

P80.57-2234-04

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:

 Central gateway (interface CAN)

 Global variant coding

 Reading in of signals

 Evaluation of input factors

 Output of signals

 Power supply for transmitter key (A8/1)

Central gateway (interface CAN)

The electronic ignition lock control unit is the central interface for the vehicle electronics and is connected to the following bus systems:

 Interior CAN (CAN B)

 Diagnostic CAN (CAN D)

 Chassis CAN (variant 1)

 Chassis CAN 1 (variant 2)

 Chassis CAN 2 (variant 2)

 Front end CAN (CAN G) (up to 31.05.2015)

Global variant coding

The electronic ignition lock control unit transmits global information such as model series and national version to the interlinked control unit via various CAN buses. The control units perform part of their configuration process to match this information.

Reading in of signals

The input factors are read in via the following connections:

 Infrared

 Direct line

 Interior CAN

 Diagnostic CAN

 Chassis CAN (variant 1)

 Chassis CAN 1 (variant 2)

 Chassis CAN 2 (variant 2)

 Front end CAN (up to 31.05.2015)

Infrared

When the transmitter key is inserted, encrypted data is exchanged via infrared signals between the transmitter key and the electronic ignition lock control unit for identification of the transmitter key.

Direct line

The signals from the following components are read via direct lines:

 Electric steering lock control unit (N26/5) (transmission 711)

 Access authorization code of transmitter key via FM, AM and ZV antenna amplifier (A2/18) (except CODE 889 (KEYLESS-GO) and CODE 893 (KEYLESS-GO start function))

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).

Diagnostic CAN

The signals are read in from the electronic ignition lock control unit via diagnostic CAN. As central interface for the vehicle electrical system, the electronic ignition lock control unit allows data exchange between vehicle control units and external diagnosis equipment.

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

Chassis CAN (variant 1)

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

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

Chassis CAN 1 (variant 2)

The signals are read in by the electronic ignition lock control unit via the chassis CAN 1 (variant 2).

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

Chassis CAN 2 (variant 2)

The signals are read in by the electronic ignition lock control unit via the chassis CAN 2 (variant 2).

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

Front end CAN (up to 31.05.2015)

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

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.

Output of signals

The signals are issued over the following connections:

 Direct line

 Interior CAN

 Diagnostic CAN

 Chassis CAN (variant 1)

 Chassis CAN 1 (variant 2)

 Chassis CAN 2 (variant 2)

 Front end CAN (up to 31.05.2015)

Direct line

The following components are actuated via direct lines:

 Electric steering lock control unit (locking voltage)

 Electric steering lock control unit (serial data line)

 FM, AM and ZV antenna amplifier (except CODE 889 (KEYLESS-GO) and CODE 893 (KEYLESS-GO start function))

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).

Diagnostic CAN

The signals are sent from the electronic ignition lock control unit via diagnostic CAN. As central interface for the vehicle electrical system, the electronic ignition lock control unit allows data exchange between vehicle control units and external diagnosis equipment.

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

Chassis CAN (variant 1)

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

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

Chassis CAN 1 (variant 2)

The signals are sent by the electronic ignition lock control unit via the chassis CAN 1 (variant 2).

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

Chassis CAN 2 (variant 2)

The signals are sent by the electronic ignition lock control unit via the chassis CAN 2 (variant 2).

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

Front end CAN (up to 31.05.2015)

The signals are sent by the electronic ignition lock control unit via the front end CAN.

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. Encrypted data is exchanged via infrared signals between the transmitter key and the electronic ignition lock control unit for identification of the transmitter key.