BCM Network Input Messages
Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
Turn signal switch status | GWM | Indicates the turn signal stalk position on the LH steering column multifunction switch (left/right lane change or turn signal on or off). The BCM activates the left/right turn signals based on this input. |
Turn signal lamp out status | GWM | Indicates that there is an outage of one of the rear turn signal lamps |
GWM Network Input Messages
Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
Turn signal switch status | SCCM | Indicates the turn signal stalk position on the LH steering column multifunction switch (left/right lane change or turn signal on or off). |
Turn indication request | BCM | A command to activate/deactivate the exterior mirror turn indicator. |
Turn signal lamp out status | Body Control Module (BCMB) | Indicates that there is an outage of one of the rear turn signal lamps |
DDM and PDM Network Input Messages
Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
Turn indication request | GWM | A command to the DDM or PDM to activate/deactivate the exterior mirror turn indicator. |
Turn Signals
The SCCM monitors the LH steering column multifunction switch position. When the LH steering column multifunction switch is in the LH or RH TURN position, the SCCM sends a message over the HS-CAN2 to the GWM then the GWM sends the message to the BCM over the HS-CAN1 indicating a request for the LH or RH turn signal.
When the BCM receives a request for a turn signal, the BCM supplies on/off voltage to the front and rear turn lamps and, if not equipped with a memory seat, the exterior mirrors.
For vehicles equipped with a memory seat, the BCM sends a turn indicator command message over the HS-CAN1 to the GWM then the GWM sends the message to the MS-CAN to the door modules for the exterior mirror turn lamps.
The timed on/off cycle for turn lamps is determined by the BCM and is set to flash approximately 70 times per minute if both the front and rear turn signal lamps operate correctly.
The rear turn lamps are Light Emitting Diodes (LEDs) in the rear lamp assemblies and have an outage circuit that tells the Body Control Module (BCMB) when the Light Emitting Diodes (LEDs) are inoperative. During normal operation, when voltage is applied to the rear turn Light Emitting Diodes (LEDs), the feedback circuit sends the same voltage back to the Body Control Module (BCMB) through the outage circuit. If the Light Emitting Diodes (LEDs) are inoperative the Body Control Module (BCMB) will not receive this voltage feedback through the outage
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.