Starter interlock

It is only possible to start the engine in selector-lever position "P" or "N".

> E83

The EWS (electronic immobilizer) evaluates the following signal from the EGS (Electronic Transmission Control) for the start:

Selector-lever position "P" or "N" as signal via the direct line

Fig 1: Electronic Immobilizer (EWS) - Circuit Diagram
Courtesy of BMW OF NORTH AMERICA, INC.

Index	Explanation
1	EGS control module integrated in the mechatronics module
2	Instrument cluster (KOMBI)
3	Electronic immobilizer (EWS)
4	Digital Engine Electronics (DME)
5	Display of the selector-lever position with gearshift diagram in the selector-lever cover
6	Bowden cable for withdrawal lock of the ignition lock
7	Ignition lock with withdrawal lock (interlock)
8	Selector lever
9	Bowden cable for gear position switch with transmission position sensor and parking lock
PT-CAN	Powertrain CAN

> E81, E87, E90, E91, E92, E93

The CAS (Car Access System) evaluates the following signals from the EGS (Electronic Transmission Control) for the start:

As a general principle, the CAN message is used. If this is faulty or invalid, a switch is made to the signal from the direct line.

Fig 2: Car Access System - Circuit Diagram

Courtesy of BMW OF NORTH AMERICA, INC.

Index	Explanation
1	EGS control module integrated in the mechatronics module
2	Car Access System (CAS)
3	START-STOP button
4	Insert compartment with withdrawal lock (interlock)
5	Remote control
6	Instrument cluster (KOMBI)
7	Junction box electronics (JBE)
8	DME (Digital Engine Electronics) or DDE (Digital Diesel Electronics)
9	Steering wheel with rocker switches
10	Display of the selector-lever position with gearshift diagram in the selector-lever cover
11	Selector lever
12	Bowden cable for gear position switch with transmission position sensor and parking lock
K CAN	Body CAN
Terminal 15 WUP	Wake-up line (terminal 15 wake up)
PT-CAN	Powertrain CAN