LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volvo >> 2009 >> S80 Base >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Miscellaneous Electrical - Design And Function - 5 Of 5 >> Suspension Module (Sum) >> System Overview >> Signals
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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 illustration 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)
    GLL175020
    • the vehicle speed
    • actual brake mode (ABS, DSTC, EBA)
    • brake pressure
    • actual and required yaw rate
    • lateral acceleration.
    • Fig 2: Engine Control Module (ECM)
    GLL175104
    • required and actual engine torque
    • engine speed
    • Fig 3: Steering Wheel Angle Sensor Module (SAS) Installed Inside Steering Wheel Module (SWM)
    GLL179272
    • steering wheel angle and steering wheel angle speed.
    • Fig 4: Central Electronic Module (CEM)
    GLL175395
    • back-up g0ear status
    • global parameters
    • intensity of the lighting in the switch from the light switch module (LSM).
    • Fig 5: Climate Control Module (CCM)
    GLL178455
    • the intensity of the lighting in the switch via the twilight sensor.
    Fig 6: Driver Information Module (DIM)
    GLL174968
    • a text message indicating that Four-C (Continuously Controlled Chassis Concept) is not working.
    • Fig 7: Headlamp Control Module (HCM)
    GLL175022
    • from height sensor, used for headlamp range adjustment.
scientia non olet · About LEMON Manuals