Network Message Chart
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Audio mute | C-CM | Data used to command audio mute during possible collision event so that the warning chime can be heard. |
NETWORK INPUT MESSAGES - ACM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| HUD data | HUD module | Used for HUD active, available and fault status. |
NETWORK INPUT MESSAGES - C-CM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Forward collision warning HUD flash command | C-CM | Flashes the HUD LED array when commanded. |
| Ignition satus | BCM | Used for ignition switch position input. |
MODULE NETWORK INPUT MESSAGES - HUD
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Adaptive cruise control_brake deceleration request | C-CM | Data used to command warning chime during possible collision event. |
NETWORK INPUT MESSAGES - IPC
Cruise Control Module (C-CM)
The C-CM contains a radar sensor unit that determines the distance and relative speed of the vehicle that is in the path of travel.
Head Up Display (HUD) Module
The HUD contains the red LEDs that warn the driver of a possible collision event when commanded by the C-CM .
There are certain situations when the warning LEDs cannot be seen, such as strong sunlight or when wearing sunglasses. The HUD module has a temperature sensor circuit that is integral to the module that senses the temperature of the LEDs internal to the module. When a high passenger compartment temperature such as strong sunlight is sensed by the temperature sensor, the warning LEDs can be temporarily disengaged. If this occurs, only the audible warning chime is used. Warnings may not appear if the distance to the vehicle ahead is very small or if the steering wheel and pedal movements are large, for example, due to a very active driving style.
The Forward Collision Warning System Is Inoperative
Refer to OEM Wiring Diagrams - VEHICLE EMERGENCY MESSAGING SYSTEM for schematic and connector information.