Volvo Workshop Manuals
XC90 AWD L6-2.9L Turbo VIN 91 B6294T (2004)
Relays and Modules > Relays and Modules - Steering and Suspension > Relays and Modules - Steering > Steering Mounted Controls Communication Module > Component Information > Testing and Inspection > Reading and Clearing Diagnostic Trouble Codes > Page 1229
Checking communication errors
Selecting car model
Select car model to obtain relevant troubleshooting information.
Select one of the following model alternatives
1. S40 (04-)/V50.
1 - car model S40 (04-)/V50
2 - car model V70 (00-), V70 XC (01-)/XC70, S60, S80 and XC90
3 - car model V70 (-00), V70 XC and S70/C70
4 - Checking communication errors car model S40 (-04)/V40
Checking communication errors, car model S40 (04-)/V50
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
Hint: For current information about each circuit and signals, see wiring diagram and signal description for each system.
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
For communication problems with control units on the high-speed network, check communication cables between diagnostic outlet #6/#14 and
For communication problems with control units on the low-speed network, check communication cables between diagnostic outlet #3/#11 and
Also check the communication cables for the low and high-speed net between the central electronic module (CEM) and the other connected
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
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
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.
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