System Overview: Signals

The table below summarizes the input signals to and output signals from the suspension module (SUM). The signals are divided into directly connected signals and CAN communication. The graphic below displays the same information with the Volvo component designations

Input signals	Output signals
Directly connected:	Directly connected:
Height sensor, suspension (7/118, 7/119, 7/120, 7/121): measures the vertical position of the suspension, individually for each wheel. Acceleration sensor, body : measures the body's vertical speed change. Switch : driving mode or can be selected.	Valve deployment, shock absorber (8/20, 8/21, 8/22, 8/23): solenoids in the shock absorbers. Switch (3/225): selected driving mode indicated.
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
Fig 1: Brake control module (BCM) (4/16): Courtesy of VOLVO CARS CORPORATION - the vehicle speed actual brake mode (ABS, DSTC, EBA) brake pressure actual and required yaw rate lateral acceleration. Fig 2: Engine control module (ECM) (4/46): Courtesy of VOLVO CARS CORPORATION - required and actual engine torque engine speed Fig 3: Steering wheel angle sensor module (SAS) installed inside the steering wheel module (SWM) (3/130): Courtesy of VOLVO CARS CORPORATION - steering wheel angle and steering wheel angle speed. Fig 4: Central electronic module (CEM) (4/56): Courtesy of VOLVO CARS CORPORATION - back-up gear status global parameters intensity of the lighting in the switch from the light switch module (LSM). Fig 5: Climate control module (CCM) (4/6): Courtesy of VOLVO CARS CORPORATION - the intensity of the lighting in the switch via the twilight sensor.	Fig 6: Driver information module (DIM) (5/1): Courtesy of VOLVO CARS CORPORATION - a text message indicating that Four-C (Continuously Controlled Chassis Concept) is not working. Fig 7: Headlamp Control Module (HCM) (4/118) (Applies up to and incl. structure week 201119 and only vehicles with Bi-Xenon lights): Courtesy of VOLVO CARS CORPORATION - from height sensor, used for headlamp range adjustment.