DTC Detection Logic
| DTC (On board display) |
Trouble diagnosis name | DTC detecting condition | Possible causes |
|---|---|---|---|
| U1521 (177) |
SONAR CHECKSUM ABNORMALITY | ADAS control unit detects an error signal that is received from sonar control unit via CAN communication | Sonar control unit |
NOTE:
If DTC "U1521" is detected along with DTC "U1000", first diagnose the DTC "U1000". Refer to DTC LOGIC .