Seat Belt Reminder

Fig 1: Seat Belt Reminder Control

Courtesy of VOLVO CARS CORPORATION

The seat belt reminder reminds the driver to put on the seat belt. There are three versions of the seat belt reminder:

European
American
other countries.

The difference between the two is described below. The signals which indicate the variant (European, American or other) are transmitted by the central electronic module (CEM) (4/56) via the control area network (CAN).

If the seat belt is not fastened, this is indicated to the driver, partly by two small symbols lighting up by the roof lamp. Partly by a sound from and a symbol lighting in the driver information module (DIM) (5/1).

European version (applies up to and incl. structure week 200650)

All the seats in the vehicle are monitored.

If the driver's seatbelt and/or front passenger seatbelt are not buckled when the ignition is turned on, the symbols will light up. An audible signal will also be heard from the Driver information module (DIM) when the vehicle speed is above 10 km/h. The audible signal's frequency is increased at speeds over 25 km/h, and at speeds over 40 km/h the volume is also increased. This continues until the seatbelt is buckled, speed is below 5 km/h, or reverse is engaged.

For the backseat there is status monitoring that generates various text messages depending on which belts are buckled. These messages are turned off 30 seconds after the vehicle has reached a speed above 10 km/h.

If a backseat belt is unbuckled a warning message is lit on the Driver information module (DIM) and in the overhead console and an audible signal will be heard if speed is above 10 km/h. The sound and light signal and text messages can be removed with the Read-button on the steering wheel stalk.

European version (applies from and incl. structure week 200651)

All the seats in the vehicle are monitored.

The audible signal can be turned off by buckling the seatbelt or selecting reverse.

When the highest volume of the audible signal has started, over 40 km/h, and the speed is then reduced to below 40 km/h, the highest volume will remain for 90 seconds. After these 90 seconds, the audible signal returns to becoming speed-dependent if the vehicle is driven with a speed below 40 km/h.

If a backseat belt is unbuckled a warning message is lit on the Driver information module (DIM) and in the overhead console and an audible signal will be heard if speed is above 10 km/h.

Sound and warning signals follow the same pattern as for the front seat.

Sound and light signals and text messages can be removed with the Read-button on the steering wheel stalk.

If any rear door is closed, a message is lit in the Driver information module (DIM). The message can be turned off with the Read-button on the stalk.

American version

Monitoring only occurs for the seat belt on the driver's seat in the vehicle.

When the ignition is switched on, the symbols light continuously for 6 seconds, or until the driver's seat belt is fastened. At the same time there will be a audible signal from the driver information module (DIM) for the same period of time. If the driver then undoes the seat belt, the audible signal will not resume if more than 6 seconds have passed since the ignition was switched on.

Other version

The front seats in the vehicle are monitored.

The symbol will light if the belt is not fastened when the ignition is switched on. There is an audible signal from the driver information module (DIM) when the vehicle speed exceeds 10 km/h. This continues for 6 seconds until either the seat belt is fastened or reverse gear is selected or the audible signal is switched off using the Read button on the control stalk. The audible signal's frequency increases at speeds exceeding 25 km/h and at speeds exceeding 40 km/h the volume also increases.