Code No. U1190 No receive fault detect signal


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C, CAN Bus Diagnostics Table).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.

OPERATION

    A fault detection enabling/inhibiting signal is sent from the ETACS-ECU to the EPS-ECU.

TROUBLE JUDGEMENT
Check Conditions
    Ignition switch: ON position
Judgement Criterion
    When the microcomputer cannot receive any fault detection enabling/inhibiting signal from the ETACS-ECU, it determines that there is a problem in the system.
Fail Safe, Back Up Function
    The EPS-ECU stores diagnosis code No. U1190.

PROBABLE CAUSES

  • Malfunction of CAN bus line
  • Malfunction of the ETACS-ECU