Code No.U1190: The Network System Diagnosis Code Output Permitted Signal Can Not Be Received


TROUBLE JUDGMENT


Check Condition
  • Ignition switch is in "ON" position
Judgment Criterion
  • The diagnosis enable signal from the ETACS-ECU about the abnormal CAN is not received at all for 5 seconds or more after the ignition switch is on.
COMMENT ON TROUBLE SYMPTOM
  • The ETACS-ECU sends the permitted / not permitted signals for detecting the diagnosis code (U-code) to each ECU connected with the CAN bus line. When the engine-ECU cannot receive the permitted / not permitted signals for detecting the diagnosis code (U-code) for 5seconds, the diagnosis code No. U1190 is stored.

PROBABLE CAUSES



  • Failed ETACS-ECU
  • Failed CAN bus
  • Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics

  • Using M.U.T.-III perform the CAN bus lines diagnosis.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting Can Bus Diagnostics Table ), and then go to Step 3.

STEP 2. M.U.T.-III diagnosis code.

  • Reconfirm whether the diagnosis codes are output from engine-ECU.

  1. Erase the diagnosis codes being set.
  2. Ignition switch: "LOCK" (OFF) to "ON".
  3. Confirm whether the diagnosis codes are set.

Q. Are the diagnosis codes set?
Replace the ETACS-ECU, and then go to Step 3.
Check end.

STEP 3. M.U.T.-III diagnosis code.

  • Reconfirm whether the diagnosis codes are output from engine-ECU.

  1. Erase the diagnosis codes being set.
  2. Ignition switch: "LOCK" (OFF) to "ON".
  3. Confirm whether the diagnosis codes are set.

Q. Are the diagnosis codes set?
Go to Step 1.
Check end.