Ignition Switch Module, ISM (20): Connection

CONNECTION DESCRIPTION

Pin No.	Signal type	Description
2	Communication cable	Communication with CIM. Key transponder code to CIM. Key position to CIM. SCL locking pin in unlocked and secured position to CIM. Release SCL locking pin, command from CIM. Brightness value for key positions from CIM.
3	+X	Signal and supply to engine control module TCS control module/EPS control module
4	Ground	Power supply
5	+30	Power supply
6	+B	Wake-up signal to CIM.
10	Locking pin is in unlocked and secured position.	Hall sensor value. Signal from SCL.
11	Release locking pin.	Signal to SCL.
12	+15	Signal and supply to All P-bus control modules. Airbag Underhood electrical centre (UEC). Rear electrical centre (REC). Fuse box in instrument panel.

Fig 1: Ignition Switch Module - Communication Diagram

Courtesy of SAAB-SCANIA OF AMERICA, INC.