LKAS is a device that maintains the vehicle within a lane by detecting the lane via a camera, calculating the vehicle position and the steering force required to keep the vehicle running in the center of the lane, and controlling the vehicle accordingly. The system consists of a LKAS unit, cluster, MDPS and power switch. The TCU signal is used to determine whether the reverse gear is selected, and, if it is selected, the LKAS control stops.
While communicating with the ABS/TCS/ESP modules via CAN, if an undefined vehicle speed signal is received from them, the LKAS module generates the fault code C121586 and turns on the Malfunction Indicator Lamp.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Detect a CAN communication signal | 1. Poor contact with a connector 2. Open or short-circuited CAN communication line 3. ABS/TCS/ESP Module |
Enable Conditions |
•
IG "ON" or Engine "ON" | |
Threshold Value |
•
If an invalid vehicle speed signal is received in the TCS5 message for more than 3 times | |
Diagnostic Time |
•
Immediately |
