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
The combination meter is sent to ASC-ECU via the CAN bus lines.

DIAGNOSIS CODE SET CONDITIONS

    If the fault detection control signal from the combination meter cannot be received for 5 seconds or more, diagnosis code No.U1190 is set.

PROBABLE CAUSES

  • Malfunction of the ETACS-ECU
  • Malfunction of ASC-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?
Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ). On completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting CAN bus lines

Q. Is the diagnosis code No.U1190 set?
Go to Step 3.
This diagnosis is complete.

STEP 3. M.U.T.-III ETACS-ECU diagnosis code
Check if any diagnosis code No.U1190 is set to the ETACS-ECU.

Q. Is the diagnosis code set?
Perform troubleshooting for ETACS-ECU (Refer to GROUP 54A - Troubleshooting/Diagnosis Code Chart ).
Go to Step 4.

STEP 4. M.U.T.-III other system diagnosis code
Check if diagnosis code is set to the ETACS-ECU.

Q. Is the diagnosis code set?
Go to Step 5.
Go to Step 6.

STEP 5. Check whether the diagnosis code is reset
Recheck if the diagnosis code is set.
(1)Erase the diagnosis code.
(2)Turn the electric motor switch from "LOCK" (OFF) position to "ON" position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code No.U1190 set?
Replace the ETACS-ECU.
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 6. Check whether the diagnosis code is reset
Recheck if the diagnosis code is set.
(1)Erase the diagnosis code.
(2)Turn the electric motor switch from "LOCK" (OFF) position to "ON" position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code No.U1190 set?
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).