Control module power supply: Notes

WARNING: This page is about a different car, the 2001 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Control Module Power Supply

Courtesy of SAAB-SCANIA OF AMERICA, INC.

+30

Fig 2: Identifying Control Module Power Supply Circuit Diagram

Courtesy of SAAB-SCANIA OF AMERICA, INC.

The main relay, fuel pump relay and fuse 17 are supplied with +30 from maxi fuse 2. Control module pin 23 is supplied from fuse 28.

The control module uses +30 for its memory.

+15

Control module pin 43 is supplied with +15 from fuse 17. When +15 is applied to pin 43, the control module will be activated.