Code No. U1417: Implausible coding data

Diagnostic function

CVT-ECU checks that the coding information is normal.


The ETACS-ECU coding information about whether the 4WD-ECU is mounted or not is incorrect.



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 the ETACS-ECU sets a diagnosis code.

Q. Is the diagnosis code set?

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

STEP 3. ETACS-ECU coding data check

Using M.U.T.-III, check if any abnormality is present in the coding data below which is stored in the ETACS-ECU.
Final drive
    OK <2WD vehicles>: Front Drive
    OK <4WD vehicles>: 4WD FF Base

Q. Is the check result normal?

Go to Step 4.
Repair the coding data. If repair is impossible, replace the ETACS-ECU.

STEP 4. 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.