sounduser Posted Sunday at 05:27 PM Report Share Posted Sunday at 05:27 PM Why do some st lines have a hole in the bottom of The steering wheel. But some don't? It doesn't seem to be anything to do with age..... Quote Link to comment Share on other sites More sharing options...
Haz Posted Sunday at 06:38 PM Report Share Posted Sunday at 06:38 PM The closed-spoke steering wheels contain the motor for Adaptive Steering, as described in the 2019 Edge Workshop Manual... Adaptive Steering - Overview The adaptive steering system provides steering assist to the driver by dynamically changing the steering ratio between the steering wheel and the road wheels, thereby reducing the number of steering wheel turns required to turn the road wheels. This is accomplished through the use of a motor, worm gear and toothed hub. All adaptive steering system components are inside the steering wheel, behind the driver air bag. Additional technical detail on Adaptive Steering, from the Workshop Manual... Placing your device cursor over underlined acronyms may yield full-words descriptions of the acronyms. Adaptive Steering - System Operation and Component Description System Operation System Diagram Network Input Message Chart SECM Network Input Messages Broadcast Message Originating Module Message Purpose ABS active ABS module Used to inform the SECM an ABS event is taking place. Active front steering request ABS module Used to request steering angle changes for stability control events. EPAS fail PSCM Used to inform the SECM of an EPAS or PSCM failure. Lane keeping system status IPMA Informs the SECM of the current lane keeping system status. Odometer master value IPC This message is sent to the GWM and then to the SECM . Provides the SECM with the current odometer value in kilometers. Power pack status PCM This message is sent to the GWM and then to the SECM . Used to inform the SECM of powertrain status; OFF-torque not available, ON-torque not available, Start in Progress-torque not available, ON-torque available. Restraint impact event status RCM Informs the SECM of airbag deployment and fuel system cutoff due to a vehicle impact event. Stability control event in progress ABS module Used to inform the SECM a stability control event is taking place. Steering wheel angle ABS module Provides the SECM with steering wheel angle information for clear vision compensation. Steering wheel heat request IPC This message is sent to the GWM and then to the SECM . Informs the SECM the driver has requested the heated steering wheel to be activated. Transport mode BCM This message is sent to the GWM and then to the SECM . Used to confirm the vehicle is in normal operation mode, factory mode or transport mode. Turn signal status SCCM Informs the SECM of the current turn signal status; LEFT, RIGHT or OFF. Vehicle braking command ABS module Used to inform the SECM of vehicle braking. Vehicle configuration information BCM This message is sent to the GWM and then to the SECM . Provides the SECM with the current vehicle configuration (central car configuration). Vehicle speed PCM This message is sent to the GWM and then to the SECM . Used to inform the SECM of the current vehicle speed. Vehicle yaw data ABS module Provides the SECM with vehicle yaw data for clear vision compensation. Adaptive Steering System The SECM controls the functions of the adaptive steering system and communicates with other modules through the SASM over the HS-CAN2 . The SECM and the SASM communicate over a private CAN . To activate, the SECM requires battery voltage, ignition voltage and must communicate with other modules over the HS-CAN2 . The SECM must also receive the power pack status message from the PCM in order to activate. The SECM uses a motor to turn a toothed hub connected to the steering shaft to add or subtract incremental turns to the driver steering shaft input. At low speeds the same steering input from the driver delivers more front wheel angle, providing more low-speed agility. Low speed maneuvers require significantly less steering wheel rotation. At high speeds, straight line driving precision is increased, providing the driver with an improved highway driving experience and feel during moderate-to-high-speed cornering. As the driver turns the steering wheel, the SASM detects the speed and direction of the steering wheel rotation and transmits this information to the SECM over a private CAN . The SECM responds by activating the motor in the appropriate direction and speed to assist in turning the front wheels and reducing the necessary number of steering wheel turns required by the driver. The SECM is self-monitoring and is capable of setting and storing Diagnostic Trouble Codes (DTCs). Depending on the nature of the DTC , the SECM may engage the adaptive steering lock and may send a request to the IPC to illuminate the adaptive steering system warning indicator and display a message in the message center alerting the driver of a potential adaptive steering system concern. The warning message is sent over the HS-CAN2 to the GWM where it is converted to a HS-CAN3 message and forwarded on to the IPC over the HS-CAN3 . Adaptive Steering Lock The adaptive steering system is designed with a locking device. While the lock is engaged, the steering system is set to a fixed (1:1) steering ratio. A sound may be heard when the vehicle is started or shut off as the lock is disengaged or engaged and a slight movement of the steering wheel may be noticed while the locking action is taking place. If the vehicle loses electrical power or the SECM detects a fault while driving, the lock is engaged. Extreme operating conditions may also cause the SECM to engage the lock. This strategy prevents overheating and permanent damage to the adaptive steering system. Typical steering and driving maneuvers allow the system to cool and return to normal operation. While the lock is engaged, it is possible the steering wheel may not be straight when the vehicle is driving straight ahead and the driver may notice the steering wheel angle or "clear vision" may be off-set. The locking solenoid also engages when the ignition is set to ON and the driver door is closed, this prevents the steering wheel from turning unnecessarily while the system is off and affecting steering wheel clear vision. The locking solenoid disengages once the engine is started. Heated Steering Wheel The SECM is also the controlling ECU for the heated steering wheel system. For additional information on heated steering wheel functionality, Refer to: Steering Wheel and Column Electrical Components - System Operation and Component Description (211-05 Steering Wheel and Column Electrical Components, Description and Operation). Component Description Adaptive Steering Locking Solenoid The locking solenoid is a normally engaged (locked) solenoid which requires a voltage input to disengage (unlock). This provides a fail-safe in case of SECM or adaptive steering system failure. Adaptive Steering Motor The adaptive steering motor is a reversible, variable speed motor with an attached worm gear. The motor is internal to the steering wheel and is serviced with the steering wheel. SECM The SECM is the ECU for the adaptive steering system. The module monitors all sensor inputs and HS-CAN2 messages relating to the adaptive steering system and directly controls the output of the adaptive steering motor. The SECM is internal to the steering wheel and is serviced with the steering wheel. Conventional Edge steering wheel... Good luck! 3 Quote Link to comment Share on other sites More sharing options...
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