Engine Sound Control Unit, Component Description - GF54.21-P-0019FH
Model 238
Up To Model Year 2021
With Code B63 (Engine sound via speakers)
except code 810 (Premium sound system)
except code 811 (High-End sound system)
Shown On Model 238.3
Location
The engine sound control unit is located at the rear right above the wheel arch.
Tasks
As a result of advancements in vehicle insulation, the sound of the engine and exhaust system can no longer be perceived optimally in the vehicle interior, which may have a detrimental affect on the driving experience. In order to optimize the sound of the engine and exhaust system in the vehicle interior, the engine sound control unit enhances the acoustic panorama in the vehicle interior by simulating sound components through the speaker system.
The engine sound control unit receives the following signals:
- Control signals (e.g. engine speed, engine load and vehicle speed) over drive train CAN (CAN C1) from ME-SFI [ME] control unit (N3/10)
- Analog signals via a direct line from the head unit (A26/17)
- CAN signal via the telematics CAN (CAN A) from the head unit to safeguard subnetwork operation
The engine sound control unit superimposes synthesized sound signals on the input signals from the head unit and sends the composite signals via direct lines to the following speakers:
- Left front door midrange speaker (H4/1)
- Right front door midrange speaker (H4/2)
- Left side paneling midrange speaker (H4/3)
- Right side paneling midrange speaker (H4/4)
- Left front door tweeter (H4/33)
- Right front door tweeter (H4/34)
- Left front footwell woofer (right-hand drive vehicles) (H4/42)
- Right front footwell woofer (left-hand drive vehicles) (H4/43)
| Wiring diagram of engine sound control unit | PE54.21-P-2148-97DCA |