The table below summarizes the input signals to and output signals from the multimedia module (MMM). The signal types are divided into directly connected signals and MOST communication. The graphic below depicts the same information with the Volvo component designations.

Input Signals	Output Signals
Directly connected:	Directly connected:
Power supply Ground GPS signal from GPS antenna (16/47) TMC signal from antenna amplifier (16/16)	High level display front (HLDF) (16/46) (color and synchronization signals)
Via MOST communication:	Via MOST communication:
Infotainment control module (ICM) (3/281) (brake control module (BCM) and transmission control module send signals to infotainment control module (ICM) via CAN network).	Infotainment control module (ICM) (3/281) Integrated audio module (IAM) (16/1) Phone module (PHM) (16/60) with Volvo On Call (vehicle position)

Fig 1: Identifying Input Signals And Output Signals From Multimedia Module (MMM)

Courtesy of VOLVO CARS CORPORATION

When to See a Mechanic

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• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

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System Overview: Signals

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