Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Bus and Diagnostics Communication



System Overview, Bus And Diagnostics Communication, Petrol

System overview, function

LHD







System overview, components







1. Trionic, engine management system (ECM)
2. TCM (Transmission Control Module), control module for automatic gearbox (502)
3. TC/ABS (Traction Control) (382)
4. P-bus (Powertrain bus)
5. MIU (Main Instrument Unit) (540)
6. I-bus (Instrument bus)
7. SID (Saab Information Display) (541)
8. TWICE (Theft Warning Integrated Central Electronics) (632)
9. ACC (Automatic Climate Control) (216)
10. Audio system, main unit (353)
11. CDC (CD changer) (355)
12. PSM (Power Seat Memory) (357Dk)
13. PMM (Power Mirror Memory), door mirror memory (611)
14. DICE (Dashboard Integrated Central Electronics) (628)
15. Steering wheel tilt sensor (657)
16. Airbag (SRS) (331)
17. ESP (Stabilizer system) (671)
18. SPA (Saab Parking Assistance) (630)
19. Switch, navigation/telephone (693)
20. Signal converter, I-bus (694)