CAN communication is a parallel circuit to interchange information among each units. CAN communication can share much information with units more faster and more efficiently by using specified language.
CAN-High line is twisted with CAN-Low line as a purpose in preventing from a noise.
The operating duty of EMC is maintained at 100 : 0 (2WD) for guaranteeing stabilized driving force, accuracy of the control during inside ABS, FTCS, ESP control.
DTC U0121 is set if 4WD ECM can’t receive any response signal from VDC.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Signal monitoring |
•
Poor Connection
•
Power supply to each module
•
Open or short in communication line of 4WD ECM
•
Open or short in communication line of VDC
•
Faulty 120Ω registror(IPM)
•
Faulty 4WD ECM
•
Faulty VDC |
Enable conditions |
•
IG ON | |
Threshold value |
•
No CAN message from VDC for more than 1sec. | |
Detecting time |
•
2sec. | |
Check Lamp |
•
Lamp ON |
