V50 L5-2.4L VIN 39 B5244S7 (2005)
For communication problems with control units onthe high-speed network, check communication cables between diagnostic outlet #6/ #14 and
central electronic module (CEM) #B11/ #B12 for open circuit, short-circuit to ground and short-circuit to voltage according to references above.
For communication problems with control units onthe low-speed network, check communication cables between diagnostic outlet #3/#11 and
central electronic module (CEM) #B16/#B15 for open circuit, short-circuit to ground and short-circuit to voltage according to references above.
Also check the communication cables for the low and high-speed net between the central electronic module (CEM) and the other connected
control modules according to troubleshooting above.
Check that the control module's voltage feed and ground connection are trouble-free.
Caution! If none of the above checks help, try reading out diagnostic trouble codes in the central electronic module (CEM). Done via VIDA
vehicle communication. A prerequisite for being able to communicate with the control modules in the vehicle is that the central electronic
module (CEM) is active and can be communicated with. If communication is not possible with the central electronic module (CEM), check the
voltage feed and ground for the central electronic module (CEM).
VCT2000 and cable harness
Connect VCT2000 to the vehicle so that it is supplied with voltage. Test VCT2000 by selecting the system's self-test and VCT Test in the VIDA
main menu. If any malfunction is found according to the test, first replace the cable harness then the VCT2000, if the test still indicates a
If no malfunctions were found after troubleshooting according to above, try with a new cable harness and/or new VCT2000.
If no malfunctions were found after troubleshooting according to above, try performing a complete system reset of VIDA.
Checking wiring and terminals See: Testing and Inspection/Component Tests and General Diagnostics/Checking Wiring and Terminals
Continue - Fault-tracing information
Checking communication errors, car model V70 (00-), V70 XC (01-) / XC70, S60, S80 and XC90
Hint: Test the communication with another corresponding vehicle to decide if the malfunction is in the vehicle or in VIDA/VCT/cable harness. If the
communication works on another vehicle, the malfunction is in the vehicle.
Hint: For current information about each circuit and signals, see wiring diagram and signal description for each system.
Different speed on the CAN-communication can lead to problems
Volvo's vehicles have different speed of communication on the high-speed part of the CAN-network (HS-CAN), depending on model year.
Model year -2004 communicates with 250 kbit/s.
Model year 2005- communicates with 500 kbit/s.
Due to this, it is very important to specify correct vehicle profile before any communication is started with the vehicle's HS-CAN. This is normally done
by pressing on " Retrieve VIN" or by manually specifying vehicle parameters under "Vehicle profile".
If the wrong model year has been selected, it may lead to blocking of the CAN-net, diagnostic trouble codes being stored in several control modules or
missing response from control modules at continued communication. The following control modules may be affected by this problem: