Classification Title VCM User Manual Owner Nicklas Andersson Document number 5610_40037 Date 2020-09-08 Revision 1.4 Page 1(9) VCM User Manual Classification Title VCM User Manual Owner Nicklas Andersson Document number 5610_40037 Date 2020-09-08 Revision 1.4 Page 2(9) Content 3.2 3.1 2 3 3.2.1 1.1 1.2 1.3 1 General ...................................................................................................................................................... 3 Revision history ................................................................................................................................. 3 Abbreviations .................................................................................................................................... 3 References ......................................................................................................................................... 3 Introduction ............................................................................................................................................... 4 Technical Description ................................................................................................................................ 5 Connectors ......................................................................................................................................... 5 DLC Ethernet connector ............................................................................................................ 5 3.1.1 USB/IHU Ethernet connector .................................................................................................... 5 3.1.2 3.1.3 Main connector .......................................................................................................................... 5 3.1.4 WLAN antenna .......................................................................................................................... 5 GNSS antenna............................................................................................................................ 5 3.1.5 Power supply ..................................................................................................................................... 5 Supported bands ........................................................................................................................ 6 3.3 WLAN ............................................................................................................................................... 6 3.3.1 Supported bands ........................................................................................................................ 6 Functional Description .............................................................................................................................. 7 Diagnostics ........................................................................................................................................ 7 DoIP connection ........................................................................................................................ 7 4.1.1 4.1.2 CAN connection ........................................................................................................................ 7 4.1.3 WLAN ....................................................................................................................................... 7 4.2 WLAN access point ........................................................................................................................... 7 Data gateway ..................................................................................................................................... 7 4.3 4.4 Positioning information ..................................................................................................................... 7 Installation and maintenance ..................................................................................................................... 8 Installation ......................................................................................................................................... 8 5.1 5.2 Maintenance ...................................................................................................................................... 8 6 Regulatory Certifications ........................................................................................................................... 9 USA (FCC) ........................................................................................................................................ 9 OEM Requirements ................................................................................................................... 9 4.1 6.1 5 4 6.1.1 Classification Title VCM User Manual Owner Nicklas Andersson Document number 5610_40037 Date 2020-09-08 Revision 1.4 Page 3(9) 1 General 1.1 Revision history Revision 1.0 1.1 1.2 1.3 1.4 Author Nicklas Andersson Salah Alazawi Salah Alazawi Nicklas Andersson Nicklas Andersson Date 2017-08-31 2017-10-09 2019-09-12 2020-07-03 2020-09-08 Description First version Updated for FCC Corrected FCC information Updated power values 5GHz WLAN Removed information for Canada variant. 5.1 Added information about antenna and cable length. 1.2 Abbreviations Abbreviation Meaning DoIP ECU GNSS OBD SRS WLAN Diagnostics over IP Electrical Control Unit Global Navigation Satellite System On-Board Diagnostics Supplemental Restraint System Wireless Local Area Network 1.3 References Reference Title Doc. number Revision 2 Classification Title VCM User Manual Owner Nicklas Andersson Document number 5610_40037 Date 2020-09-08 Revision 1.4 Page 4(9) Introduction The VCM is a connectivity ECU that is factory fitted in cars from Volvo Car Corporation (VCC). It handles the diagnostic routing between the vehicle and the external test equipment for diagnostic connections via CAN*, Ethernet/WLAN and Remotely via available Internet connections. The VCM can also be used as a Wi-Fi hotspot for people inside the vehicle as well as a W-Fi client to connect to available hotspots (for instance, a hotspot provided from a passengers laptop or cell phone), and it provides raw GNSS position for use by other ECUs in the vehicle, such as the Navigation system. The VCM is capable of routing data to/from available Internet sources in the vehicle, for instance the Wi-Fi station in the VCM, a Bluetooth handy connected to another ECU in the vehicle, or a vehicle modem, also located in another ECU in the vehicle.
* Legislated OBD diagnostics (11-bit CAN) are not routed via the VCM. Classification Title VCM User Manual Owner Nicklas Andersson Document number 5610_40037 Date 2020-09-08 Revision 1.4 Page 5(9) 3 3.1 Technical Description Connectors Connector No 1 2 3 4 5 Function DLC Ethernet USB/IHU Ethernet Main Connector WLAN antenna GNSS antenna 3.1.1 DLC Ethernet connector The DLC Ethernet connector is used for Ethernet communication with external diagnostics equipment. 3.1.2 USB/IHU Ethernet connector The IHU Ethernet connector is used for Ethernet communication with the head unit in the car. 3.1.3 Main connector The main connector is used to connect power, FlexRay and CAN communication, external SIM card holder, microphone and speaker, SOS, roadside assistance and exit buttons, and connection to the SRS control unit. 3.1.4 WLAN antenna The pastel orange Fakra connector is used to connect an external WLAN antenna. 3.1.5 GNSS antenna The blue Fakra is the input for the GNSS antenna. 3.2 Power supply Operating voltage range: 8-16 VDC. Nominal 13.8V. Maximum current consumption 1.5A @ 8V. Classification Title VCM User Manual Owner Nicklas Andersson Document number 5610_40037 Date 2020-09-08 Revision 1.4 Page 6(9) 3.2.1 Supported bands Technology GPS GLONASS Bands L1 L1 FDMA 3.3 WLAN The WLAN antenna is connected to the orange Fakra connector. The product supports dual-band 802.11b/g/n at 2.4GHz and 802.11a/n at 5GHz. Supported channels are listed below. When the product is installed in a vehicle the useable channels are limited to what is allowed in the current country. 3.3.1 Supported bands 3.3.1.1 802.11b Parameter Channels Data rates Output power 1-13 1, 2, 5.5, 11 Mbps
+18 dBm 3.3.1.2 802.11g Parameter Channels Data rates Output power 1-13 6, 9, 12, 18, 24, 36, 48, 54 Mbps
+15 dBm 3.3.1.3 802.11n Parameter Channels Data rates Output power 3.3.1.4 802.11a 2.4GHz: 1-13 5GHz: 36-165 MCS0-MCS7 2.4GHz: +15 dBm 5GHz: channesl 36-140: +13dBm, channels 149-165 +11 dBm Parameter Channels Data rates Output power 36-165 6, 9, 12, 18, 24, 36, 48, 54 Mbps 5GHz: channels 36-140: +13dBm, channesl 149-165: +11 dBm Classification Title VCM User Manual Owner Nicklas Andersson Document number 5610_40037 Date 2020-09-08 Revision 1.4 Page 7(9) 4 Functional Description 4.1 Diagnostics 4.1.1 DoIP connection The DoIP interface in the vehicle is located in the OBD connector. When a test equipment is connected on the OBD Ethernet port, the VCM presents itself on the network using a Vehicle Announcement Message, as specified in ISO 13400-2. Based on the content of this message, an external tester tool can connect to the VCM and create a diagnostic session. 4.1.2 CAN connection The diagnostics over CAN interface is also located in the OBD connector. To communicate with the VCM and the ECUs behind the VCM in the vehicle topology, the diagnostic requests shall be sent with 29-bit addressing. The same CAN interface is used for legislated ODB diagnostics. For such purposes, 11-bit addressing is used. Such CAN traffic does not affect the VCM. 4.1.3 WLAN Diagnostics functionality is also available via WLAN. The unit ca be set in a mode where it acts like a WLAN station and attaches to a hotspot in the workshop. 4.2 WLAN access point VCM can act as a WLAN access point for passengers in the car. User interface needs to be implemented in an external unit, e.g. in a head unit with display. The WLAN access point functionality is controlled via IHU Ethernet interface. Data gateway VCM acts as a data gateway for the WLAN access point and other ECUs in the vehicle. It can e.g. provide internet connectivity for the head unit. The data gateway is controlled via the IHU Ethernet interface. Positioning information The product automatically outputs GNSS raw position data on the CAN bus. The GNSS data is used by other ECUs in the vehicle, for instance the Navigation system. 4.3 4.4 Classification Title VCM User Manual Owner Nicklas Andersson Document number 5610_40037 Date 2020-09-08 Revision 1.4 Page 8(9) Installation and maintenance Installation The VCM is factory fitted in Volvo vehicles. It is not possible to buy this product separately. The product is certified to be used with an external roof mounted antenna. Volvo part number 31346764 Minimum cable length is 2.5m. Maintenance The status of the VCM can be read via diagnostic connections using special workshop tools. In addition, other ECUs monitor the communication from the VCM and in case of missing/invalid communication, the Central Electronic Module in the vehicle is alerted, and will display a warning to the driver. Maintenance and replacement of the VCM can only be performed by Volvo certified workshops. 5 5.1 5.2 Classification Title VCM User Manual Owner Nicklas Andersson Document number 5610_40037 Date 2020-09-08 Revision 1.4 Page 9(9) Regulatory Certifications USA (FCC) This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired operation. 6.1.1 OEM Requirements Following text should be printed in the user manual for vehicles in US:
Type Approval USA FCC ID: 2AGKKVCM This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired operation. WARNING: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 6 6.1