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.
2003 Volvo S80 T-6FACTORY OEM SERVICE PROCEDURE
Control Modules - Design And Function - 2 Of 3
- Lin - Local Interconnect Network (1999-2006)
- The Controller Area Network (Can) (2005-2006)
- The Controller Area Network (Can) (1999-2004)
- Accessory Electronic Module (AEM) (2001-2006)
- Central Electronic Module (CEM) (1999-2004)
- Central Electronic Module (CEM) (2005-2006)
- Rear Electronic Module (Rem) (1999-2004)
- Rear Electronic Module (Rem) (2005-2006)
- Upper Electronic Module (1999-2004)
- Upper Electronic Module (UEM) (2005-2006)
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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