Continuously Variable Transmission/Transaxle, CVT

DTC U1415: Coding not implemented

DIAGNOSTIC FUNCTION

TCM checks that the coding information is normal.

JUDGMENT CRITERIA

When the TCM coding has not been performed.

PROBABLE CAUSES

- Malfunction of CAN bus line
- Variant coding for ETACS-ECU has not been implemented.
- Malfunction of ETACS-ECU
- Malfunction of TCM

DIAGNOSIS

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

Use 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 a coding-related diagnostic trouble code is set in the ETACS-ECU.

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. 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.