Code No. U1197: Coding data unavailable

Diagnostic function

CVT-ECU checks that the coding information is normal.


When the CVT-ECU cannot receive "programmed" signal.



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 2.
Repair the CAN bus lines. (Refer to GROUP 54C - Troubleshooting .)

STEP 2. Use M.U.T.-III to confirm a diagnosis code of other systems.

Check if a coding-related diagnosis code is set in the ETACS-ECU.

Q. Is the diagnosis code set?

Diagnose the ETACS-ECU. (Refer to GROUP 54A - Troubleshooting )
Go to Step 3.

STEP 3. Diagnosis code recheck

Check again if the diagnosis code is set to CVT-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace the CVT-ECU.
Intermittent malfunction.