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Network Message Chart

ABS MODULE NETWORK INPUT MESSAGES

Broadcast Message Originating Module Message Purpose
Brake pedal applied PCM Used to inform the ABS module the driver has pressed the brake pedal. This message is also used by the ABS module to check the brake pressure sensor located inside the HCU.
Brake switch on/off PCM Used to inform the ABS module the driver has pressed the brake pedal. This message is also used by the ABS module to check the brake pressure sensor located inside the HCU.
Cruise control status PCM Used to inform the ABS module of the current status of the cruise control system; off, denied, standby or active.
Door ajar status BCM The ABS module resets the parameters used for the RSC® function when a door is opened.
Engine RPM PCM Used to inform the ABS module of the current engine RPM. The ABS module uses this information for traction control, ESC and RSC® functions.
Hood ajar status BCM The ABS module resets the parameters used for the RSC® function when the hood is opened.
Ignition key type BCM Used to inform the ABS module of the current MyKey® type; admin or restricted. If the traction control is configured to "always on" through the use of an admin key, a restricted key user cannot disable the traction control system.
Liftgate ajar status BCM The ABS module resets the parameters used for the RSC® function when the liftgate is opened.
Odometer master value BCM This message provides the ABS module with the current odometer value.
Parking brake actual BCM This message provides the ABS module with the current parking brake status; applied or not applied. This information is used for the hill start assist system.
Power mode BCM This message informs the ABS module of the current ignition mode; OFF, ACC, ON or START.
Power pack status PCM This message provides the ABS module with the current engine status; awake, ready, pre-starting, starting in process, running_running, running_standby, running_starting in progress, running_remote started and after run.
RCM serial number RCM The ABS module stores the RCM serial number and verifies the serial number when the vehicle is started or the ignition is set to run or accessory. Over time, the ABS module learns the offset of the sensors inside the RCM. When a new serial number is found, the ABS module resets the offset number learned for ESC and RSC® operation.
Selector lever (PRNDL) status TCM (internal to the PCM) The TCM is an internal part of the PCM. This message informs the ABS module when the transmission is in REVERSE gear, this is used for the hill start assist system, ESC and RSC® functions. The ESC and RSC® functions do not operate when the transmission is in REVERSE.
Stability control mode request BCM This message informs the ABS module the driver has disabled the traction control system.
Steering angle counter SASM The ABS module uses steering angle sensor information for ESC and RSC® system operation. This message provides the ABS with the current steering wheel angle count.
Steering angle status SASM The ABS module uses steering angle sensor information for ESC and RSC® system operation. This message indicates the steering wheel rotation angle (in degrees of rotation from center) and steering wheel rotation speed (in degrees per second).
Steering wheel direction of rotation SASM The ABS module uses steering angle sensor information for ESC and RSC® system operation. This message indicates which direction the steering wheel is turned from the center position.
Torsion bar torque PSCM The ABS module uses steering angle sensor information for ESC and RSC® system operation. This message provides the ABS with the current amount of force being used to turn the steering wheel (in Newton meters) and which direction it is being turned (clockwise or counter-clockwise).
Trailer lamp connection status BCM This message informs the ABS module that a trailer is connected to the vehicle. The ABS module uses this information for the trailer sway control function.
Transmission gear position TCM (internal to the PCM) The TCM is an internal part of the PCM. This message informs the ABS module of which gear the transmission is currently using, this is used for the hill start assist system, ESC and RSC® functions. The ESC and RSC® functions do not operate when the transmission is in REVERSE.
Transmission gear lever position TCM (internal to the PCM) The TCM is an internal part of the PCM. This message informs the ABS module of the driver selected transmission gear position, this is used for the hill start assist system, ESC and RSC® functions. The ESC and RSC® functions do not operate when the transmission is in REVERSE.
Transmission in REVERSE TCM (internal to the PCM) The TCM is an internal part of the PCM. This message informs the ABS module when the transmission is in REVERSE gear, this is used for the hill start assist system, ESC and RSC® functions. The ESC and RSC® functions do not operate when the transmission is in REVERSE.
Transmission torque data TCM (internal to the PCM) The TCM is an internal part of the PCM. This message informs the ABS module of the current transmission output in Newton meters. This information is used for traction control, ESC and RSC® functions.
Transport mode BCM The stability control systems react differently depending on the current car mode; normal, factory, transport or crash. This message informs the ABS module of the current car mode.
Vehicle configuration data BCM This message provides the ABS module with the current optional and configured items such as, tire size, axle ratio, manual or automatic transmission, keyless entry and VIN.
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