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.
Interior Roof Lighting
The interior roof lighting and reading lamps, front (3/117) and rear (10/150), five lamps in total, are controlled via the upper electronic module (4/70) in that they are supplied with voltage directly from the control module when each switch is activated. The courtesy lighting is also activated when the doors are opened or when local lighting is activated.
Data is sent to the upper electronic module from the central electronic module (4/56) via the Control area network (CAN). This data indicates which doors or tailgate/trunk lid are opened or closed.
The request for keyhole lighting, courtesy lighting and cargo compartment lighting is sent from the upper electronic module to the central electronic module (4/56) and rear electrical module (4/58) via the Control area network (CAN).
Cargo compartment lighting in the V70 and the V70XC (10/25) is also supplied with voltage by the upper electronic module. The lamp is activated when the central electronic module indicates to the upper electronic module that the tailgate is open.
Sun visor lighting (10/114-115) is supplied with voltage by the upper electronic module using the voltage supply signal EXT. X. The lamp is activated when the flap covering the mirror in the sun visor is opened.
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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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