Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSVOLVO2009XC70 BASEREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSELECTRICAL MODULES AND COMPONENTS - DESIGN AND FUNCTION - 2 OF 5DRIVER INFORMATION MODULE (DIM) (2008)SYSTEM OVERVIEWSIGNALS

2009 Volvo XC70 Base

System Overview: Signals

2009 Volvo XC70 BaseSECTION Signals

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:
-	The relay driver in the central electronic module (CEM) for the steering column lock module (SCL) (only applies to the S80 2007).
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

RENDER: 1.0x

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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.