XC70 L5-2.5L Turbo VIN 59 B5254T2 (2003)
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:
Brake control module (BCM)/(ABS)
Engine control module (ECM)
Electronic Throttle Module (ETM)
Suspension Module (SUM)
Central electronic module (CEM)
Transmission control module (TCM)
Steering wheel angle sensor module (SAS)
Steering Wheel Module (SWM)
Electrical Power Steering Module (EPS)
If this happens, take the following action:
Turn off the ignition and remove the ignition key. Insert the key again in position II.
If the above does not work, remove the battery cable and connect it again after a minute to reset the control modules.
Select the correct vehicle profile in VIDA and erase the diagnostic trouble codes. Check that the symptoms have disappeared.
Check the voltage feed to diagnostic outlet #16. The voltage shall match battery voltage.
Check the cable for power ground and signal ground to diagnostic outlet #4 and #5.
Hint: When VCT2000 is connected to the diagnostic outlet (is supplied with voltage), the indicator diode shall be activated with a green light. Then the
indicator diode flashes quickly when communication takes place with a control module. In case of certain internal malfunctions on VCT2000 the
indicator diode is activated with a red light!
Check the communication cable (k-line) between diagnostic outlet #7 and central electronic module (CEM) #D6 and other connected control
modules for open circuit, short-circuit to ground and short-circuit to voltage.
Caution! In case of malfunction on this communication cable, communication cannot be established on either the low or high-speed
network. First when communication takes place on this cable, the low and high-speed cables between the diagnostic outlet and central
electronic module (CEM) are connected to the rest of the network in the vehicle. This is controlled via a relay in the central electronic
module (CEM). This relay is only found on vehicles of model year -2004.
For communication problems with control units onthe high-speed network, check communication cables between diagnostic outlet #6/ #14 and
central electronic module (CEM) #B7/ #B8 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) #B19/#B20 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 car 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/Checking
Wiring And Terminals