System Overview

System overview

Driver's responsibility

Warning! For further information about laser safety, see: Design Design.

Note! It is always the responsibility of the driver to ensure that there is a sufficient distance to the vehicle ahead and that the speed is adjusted to the current traffic conditions.

Control module

Location Of Components:

Closing velocity module (CVM) is a standard control module on XC60, S60 (11-) and V60 as well as for model year 2012 also on S80 (07-), S80L, V70 (08-), and XC70 (08-). The control module is included in the support function City Safety and has the main function of preventing or reducing damage from collisions at low speed.
When the engine is started, the support function City Safety is always activated and it is active within the speed range of 4 - 30 km/h.
On XC60 the driver can turn off the function during a current driving cycle via the menu in the trip computer.
On S60 (11-) and V60 as well as XC60 from 201046, the driver can turn off the function during the existing driving cycle via the menu in Infotainment control module (ICM).
Also on S80 (07-), S80L, V70 (08-), and XC70 (08-), the driver can turn off the function during the existing driving cycle via the menu in Infotainment control module (ICM).

Note! The laser sensor in the Closing velocity module (CVM) is also active in ignition position II.

The Closing velocity module (CVM) uses lasers to detect whether the vehicle is on a collision course with a vehicle ahead.

The Closing velocity module (CVM) can request different functions depending on the actual situation:
- preloading the brake system
- automatic braking
- torque limiting in engine
- brake assistance EBA.
Closing velocity module (CVM) communicates with other control modules through the CAN-net. The control module is connected to the high-speed side of the CAN-net.
For XC60 Closing velocity module (CVM) also communicates on an internal CAN-net with Supplemental restraint system module (SRS)
For S60 (11-) and V60 the Closing velocity module (CVM) also communicates via the sensor network with Supplemental restraint system module (SRS)
The Closing velocity module (CVM) checks performed activations, input and output signals as well as functions through built-in diagnostics.
A diagnostic trouble code (DTC) is stored when, after validation, the control module detects a fault. In certain cases the faulty signal is also replaced with a substitute value or certain functions are limited.
The Closing velocity module (CVM) is powered, by battery voltage (Ubat), via a fuse in the Central electronic module (CEM). Power is supplied in ignition positions II and III. Grounding is via cables that are grounded at the left-hand A-pillar.
The Closing velocity module (CVM) is positioned inside the front window, next to the rear view mirror.

Signals
The table below summarizes the input signals and output signals to and from the Closing velocity module (CVM). The signal type is divided into directly connected signals, CAN-, sensor-CAN-, and internal CAN communication. The illustration below reproduces the same information and Volvo component designations.