The EPS CM (MDPS=Motor Driving Power Steering) gets signals such as engine RPM and vehicle speed from engine ECM through CAN communication line. And it operates it's MDPS system.
The EPS CM (MDPS=Motor Driving Power Steering) sets this DTC if it hasn't gotten engine RPM signals from engine ECM.
Item
Detecting Condition
Possible cause
DTC Strategy
CAN signal monitoring
Poor connection
Error in a relevant sensor or system
Enable conditions
IG KEY ON
Threshold value
When the EPS CM doesn't get engine RPM signals from engine ECM.
Fail safe
Motor : 254km/h controlled
Relay : ON
Fail lamp : ON
Restoration condition : EPS receives correct EMS signal from ECM (Return to Normal state)