Block Diagram
CAN abbreviations
Block Diagram (Continued)
Function Table
| Description | Source | Destination |
|---|---|---|
| AC compressor request Parking brake switch active | BCM | ECM ABS |
| Brake fluid level low | BCM | ABS |
| Low beam switch activated | BCM | AHL |
| AC requested torque | ECC/DIS | ECM |
| Ambient temperature value | DIS | ABS ECM |
| Trailer hitched to vehicle | REC | ABS |
| Automatic transmission shift request, automatic transmission winter mode switch active | SLM | TCM |
| ABS telltale on, traction control malfunction, traction control telltale on | ABS | IPC |
| Headlamp range control malfunction | AHL | IPC |
| AC compressor switched on, compressor torque, refrigerant pressure | ECM | ECC |
| Brake light switch active Clutch switch active (cruise control) | ECM | DIS PAS REC SDM SLM PAS |
| Vehicle speed signal | ECM | DIS IPC PAS BCM DDM DIS DSM IPC PAS PDM REC SDM SLM SRM UEC |
| Engine speed Fuel consumption Fuel level as percentage | ECM | DIS(ECC) DIS IPC |
| Engine coolant temperature | ECM | AHS DIS IPC |
| Engine trouble code display Engine oil change display "change soon" Engine oil change display "change now" Engine oil display, low level Engine oil display, low pressure Engine running status Alternator display on Engine control telltale active (not exhaust emissions-related) Engine control telltale activation duration (not exhaust emissions-related) Cruise control active Glow plug telltale active | ECM | DIS IPC |
| Engine running status | ECM | AHS IPC REC UEC |
| Engine speed | ECM | DIS IPC SDM |
| Electro-hydraulic power steering telltale Electro-hydraulic power steering, fluid level too low | EHPS | IPC DIS |
| Automatic transmission, current gear Automatic transmission, selector lever position Automatic transmission, "Tip UP/Tip DOWN" active | TCM | BCM DIS PDM, REC UEC IPC PAS SLM |
| Automatic transmission, trouble code Automatic transmission, winter mode telltale on | TCM | DIS IPC |
Functional Description
In the Vectra-C, the CIM functions as interface between the high-speed CAN bus (HSCAN) and the low-speed CAN bus (LSCAN).
It transmits messages from HSCAN bus-connected systems to LSCAN bus-connected systems and vice versa.