DTC C1785: Fault Detection Signal Failure: Notes
CAUTION:
- If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be stored. Prior to this diagnosis, diagnose the CAN bus lines.
- Whenever the ECU is replaced, ensure that the communication circuit is normal.
- When the diagnostic trouble code No. C1785 is stored in ACC/FCM-ECU, the diagnostic trouble code may also be stored in ETACS-ECU. When the diagnostic trouble code is stored in ETACS-ECU, perform the diagnosis of the diagnostic trouble code for ETACS-ECU first.