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 MANUALSVOLVO2004XC90 AWD L5-2.5L TURBO VIN 59 B5254T2REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSINFORMATION BUSDESCRIPTION AND OPERATIONMOST NETWORKCONTROL MODULES IN THE MOST NETWORK
2004 Volvo XC90 AWD L5-2.5L Turbo VIN 59 B5254T2
Control Modules In the Most Network
2004 Volvo XC90 AWD L5-2.5L Turbo VIN 59 B5254T2SECTION Control Modules In the Most Network
Control modules in the MOST network
MOST network
Location Of Components:
The MOST network can consist of up to eight control modules.
The infotainment control module (ICM) monitors the MOST network and manages communication. The infotainment control module (ICM) is monitored by the central electronic module (CEM) on the controller area network (CAN). In addition to the infotainment control module (ICM), there are two control modules which are standard on the MOST network. These are:
- the audio module (AUD)
- the antenna module (ATM).
The table below lists all the control modules which may be included in the MOST network.
Explanation
CAN= Controller Area Network, electrical network for communication
LS CAN= low speed side of the CAN
MOST= Media Oriented Systems Transport, fiber optic network for communication
Master control module= Control module which monitors the MOST network
Slave control module= Control module which supplies the MOST network functions
Option= accessory installed at the factory during the purchase of a new car
Accessory= after market installation
(x)= position number in the illustration
RENDER: 1.0x
NO RELATED
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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.