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DTC U0100: Engine 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 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?

	Go to Step 2.

	Repair the CAN bus lines. (Refer to GROUP 54C - Troubleshooting .) After repairing the CAN bus line, go to Step 2.

STEP 2. Scan tool diagnostic trouble code

Check the engine diagnostic trouble code. (Refer to GROUP 13B - Troubleshooting

.)

Q. Is the DTC set?

	Perform the relevant troubleshooting.

	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?

	Replace the transaxle assembly. (Refer to .)

	Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction .)