Rear parking lamps/license plate lighting

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Fig 1: Identifying Rear Parking Lamps/License Plate Lighting Communication Links & Components

Courtesy of VOLVO CARS OF NORTH AMERICA.

The parking lamps (10/17-18) and license plate lighting (10/3) light when:

the knob in the light switch module (LSM) (3/111) is in the low beam position
the knob in the light switch module (LSM) is in the parking lamp position
low beam is lit via the low beam automatic function.

The lamp switch module (LSM) transmits data using serial communication to the central electronic module (CEM) (4/56) to activate the lamps.

The central electronic module (CEM) transmits the data via the controller area network (CAN) to the rear electronic module (REM) which activates the lamps.

The rear parking lamps and license plate lighting are powered via the rear electronic module (REM) (4/58).

In the event of a bulb fault for the rear parking lamps or license plate lighting, data is transmitted on the controller area network (CAN) from the rear electronic module (REM) to the driver information module (DIM) (5/1) and a text message is displayed.

There is a Limp Home function for the parking lamps so that they will work even if there is a fault in the controller area network (CAN) or in the serial communication between the light switch module (LSM) and the central electronic module (CEM).