Twin Clutch-Sportronic Shift Transmission (TC-SST)
DTC U0100: Engine Time-out ErrorCAUTION
^ 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 engine control module cannot be received.
MONITOR EXECUTION
^ Continuous
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC, stored in memory for the item monitored below)
^ P0841: Clutch 1 pressure sensor system (Poor performance)
^ P0842: Clutch 1 pressure sensor system (Output low range out)
^ P0843: Clutch 1 pressure sensor system (Output high range out)
^ P0846: Clutch 2 pressure sensor system (Poor performance)
^ P0847: Clutch 2 pressure sensor system (Output low range out)
^ P0848: Clutch 2 pressure sensor system (Output high range out)
^ P185D: Clutch open not possible
^ U0001: Bus off
^ P1803: Shift lever system (CAN or LIN time-out error)
^ P1870: Engine torque signal abnormality
^ P1871: APS system (Signal abnormality)
^ P1872: Between shift lever and TC-SST system (Q-A function abnormality)
Sensor (The sensor below is determined to be normal)
^ Clutch 1 pressure sensor
^ Clutch 2 pressure sensor
^ APS
^ Shift lever-ECU
LOGIC FLOW CHARTS (Monitor Sequence)
DTC SET CONDITIONS
Check Conditions
^ Voltage of battery: 10 V or more.
^ Voltage of battery: 16.5 V or less.
^ Time after TC-SST-ECU start: 5 seconds or more.
JUDGMENT CRITERIA
^ CAN communication with ECM: Fail. (Immediately)
OBD-II DRIVE CYCLE PATTERN
Receive the signal from ECM.
PROBABLE CAUSES
^ The CAN bus line is defective.
^ ECM malfunction
^ 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 engine diagnostic trouble code. Diagnostic Trouble Code Descriptions
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. U0100 set?
YES: Replace the mechatronic assembly.
NO: Intermittent malfunction.