The following table summarizes input and output signals to and from the driver information module (DIM). The signal types are divided into directly connected signals and Controller area network (CAN) communication. The illustration below displays the same information with the Volvo component designations.

Input signals	Output signals
Directly connected:	Directly connected:
-	-
Via LIN communication:	Via LIN communication:
Steering wheel module (SWM) (3/130)	-
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
Brake control module (BCM) (4/16) Central electronic module (CEM) (4/56) Engine control module (ECM) (4/46) Phone module (PHM) (16/60) Supplemental Restraint System Module (SRS) (4/9) Transmission Control Module (TCM) (4/28) Driver door module (DDM) (3/126) Passenger door module (PDM) (3/127) Infotainment control module (ICM) (3/281) Parking Assistance Module (PAM) (4/86) Trailer module (TRM) (4/110)	-

Fig 1: Driver Information Module Communication Components

Courtesy of VOLVO CARS CORPORATION

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• 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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When to See a Mechanic

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