Twin Clutch-Sportronic Shift Transmission (TC-SST)

DTC U0141: ETACS Time-out Error

CAUTION
^ If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
^ Whenever the ECU is replaced, ensure that the CAN bus lines are normal.

DESCRIPTIONS OF MONITOR METHODS
The periodic communication data from the ETACS-ECU cannot be received.

PROBABLE CAUSES
^ The CAN bus line is defective.
^ Malfunction of the ETACS-ECU
^ Malfunction of TC-SST-ECU

DIAGNOSTIC PROCEDURE

Required Special Tools:
^ MB991958 Scan Tool (M.U.T-III Sub Assembly)
^ MB991824: Vehicle Communication Interface (V.C.I.)
^ MB991827 M.U.T-III USB Cable
^ MB991910 M.U.T-III Main Harness A

STEP 1. Scan tool CAN bus diagnostics
Using the scan tool, diagnose the CAN bus lines.
Q: Is the check result normal?
YES: Go to Step 2.
NO: Repair the CAN bus lines. After repairing the CAN bus line, go to Step 2.

STEP 2. Scan tool diagnostic trouble code
Check the ETACS diagnostic trouble code.
Q: Is the DTC set?
YES: Perform the relevant troubleshooting.
NO: Go to Step 3.

STEP 3. Check whether the DTC is reset.
After 15 seconds with the engine idle status, check that the DTC is reset.
Q: Is DTC No. U0141 set?
YES: Replace the mechatronic assembly.
NO: Intermittent malfunction.