External Controls - System Operation and Component Description: Notes
System Diagram
Gear Shift Module
| Item | Description |
|---|---|
| 1 | Drive Door Latch |
| 2 | GSM |
| 3 | Drive Door |
| 4 | GWM |
| 5 | BCM |
| 6 | Brake On/Off (BOO) Switch |
| 7 | Brake Pressure Switch (BPS) |
| 8 | PCM |
| 9 | TCM |
| 10 | IPC |
| 11 | RCM |
Network Message Chart
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Brake switch position | PCM | Input from brake switch necessary to change gears. TCC control, line pressure and transmission diagnostics. Indirectly affects shift pressure control. |
| Gear data | GSM | Message sent to PCM which gear is commanded. |
| Gear confirmation | PCM for gasoline. TCM for diesel. | Input to GSM confirming gear selection. |
| PRNDM mode | IPC | Used for PRNDM display. |
Network Message Chart
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Gear command | PCM for gasoline. TCM for diesel. | Input to change gears. |
| Key in ignition status | BCM | Input used to change gears. |
| Seat belt buckle data | RCM | Input from seat belt buckle to determine driver presence. |
| Vehicle speed | ABS | Used for automatic return to park function. |
| EPB request | GSM | Message sent to ABS module requesting EPB. |