Courtesy Lighting / Key Lighting / Glove Compartment Lighting

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Fig 1: Courtesy Lighting / Key Lighting / Glove Compartment Lighting Communication Diagram

Courtesy of VOLVO CARS CORPORATION

The courtesy lighting (10/125-126), ignition switch (16/65) and glove compartment lighting (10/29) are controlled via the central electronic module (CEM) (4/56). All other interior lighting is controlled by the upper electronic module (UEM) (4/70). The central electronic module (CEM) powers the lamps which it controls directly.

The lamps are powered if a door is opened (3/74-77), or when the upper electronic module (UEM) transmits a request via the control area network (CAN). The upper electronic module (UEM) transmits a request when it has received an unlock command from one of the remote controls. If a door is opened, the central electronic module (CEM) sends a control area network (CAN) signal to the upper electronic module (UEM) to light the lighting it controls.

The glove compartment lighting (10/29) is supplied with power directly from the central electronic module (CEM) when the switch by the lamp is activated when the glove compartment is opened.