DTC Description
DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-High line, CAN-Low line) allowing a high rate of information transmission with less wiring. Each control unit communicate data but selectively reads required data only.
DTC DETECTION LOGIC
| DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detected condition | |
|---|---|---|---|
| U1000 | CAN COMM CIRCUIT (CAN communication circuit) | Diagnosis condition | When power switch is ON. |
| Signal (terminal) | CAN communication signal | ||
| Threshold | EPS control unit is not transmitting/receiving CAN communication signal for 2 seconds or more. | ||
| Diagnosis delay time | 2 seconds or more | ||
POSSIBLE CAUSE
- Harness or connector (CAN communication line)
- EPS control unit
FAIL-SAFE
Constant steering state