Continuously Variable Transmission/Transaxle, CVT

DTC U1417: Wrong coding data received

DIAGNOSTIC FUNCTION

TCM checks that the coding information is normal.

JUDGMENT CRITERIA

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

PROBABLE CAUSES

- Malfunction of the CAN bus line
- ETACS-ECU coding information is abnormal
- ETACS-ECU failure or improper assembly
- Malfunction of TCM

DIAGNOSIS

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.

Use the scan tool MB991958 to diagnose the CAN bus lines.

Q. Is the check result normal?

YES Go to Step 2.

NO Repair the CAN bus lines. CAN Bus Diagnostics Chart.)

STEP 2. Use scan tool MB991958 to confirm a diagnostic trouble code of other systems.

Check if the ETACS-ECU sets a diagnostic trouble code.

Q. Is the diagnostic trouble code set?

YES Diagnose the ETACS-ECU. Electronic Time and Alarm Control System (ETACS))

NO Go to Step 3.

STEP 3. ETACS-ECU coding data check

Using scan tool MB991958, check if any abnormality is present in the coding data below which is stored in the ETACS-ECU.
Final drive

OK[ FWD vehicles]: Front Drive
OK[ AWD vehicles]: 4WD FF Base

Q. Is the check result normal?

YES Go to Step 4.

NO Repair the coding data. If repair is impossible, replace the ETACS-ECU.

STEP 4. Diagnostic trouble code recheck

Check again if the diagnostic trouble code is set to TCM.
(1)Erase the diagnostic trouble code.

(2)Turn the ignition switch from the "LOCK (OFF)" position to the "ON" position.

(3)Check if the diagnostic trouble code is set.

Q. Is the diagnostic trouble code set?

YES Replace the TCM.

NO Intermittent malfunction.