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DTC U0100: CAN Time-out Error (Engine)
 
 
 
 
DIAGNOSTIC FUNCTION
TCM receives periodic communication data from the ECM via CAN bus lines.
 
 
DESCRIPTIONS OF MONITOR METHODS
  • TCM cannot receive the periodic communication data from the ECM.
 
 
MONITOR EXECUTION
  • When 1.05 seconds have elapsed after TCM started
 
 
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
LOGIC FLOW CHARTS (Monitor Sequence)
 
 
DTC SET CONDITIONS
Check Conditions
  • Time after TCM start: more than 1.05 seconds.
  • Voltage of battery: 9 volts or more
  • Voltage of battery: 16 volts or less
Judgment Criteria
  • CAN communication with ECM: fail. (500 millisecond)
 
 
OBD-II DRIVE CYCLE PATTERN
Ignition switch: ON (start the engine and keep it for 10 seconds or more)
 
 
PROBABLE CAUSES
  • Malfunction of the CAN bus
  • Engine ECU malfunction
  • Malfunction of TCM
 
 
DIAGNOSIS
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
Use scan tool MB991958 to perform the CAN bus diagnosis.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting, Diagnostic Trouble Code Chart ).
 
STEP 2. M.U.T.-III diagnostic trouble code
Check if the engine-related diagnostic trouble code is stored.
Is the engine-related diagnostic trouble code stored?
Carry out the appropriate troubleshooting.
Go to Step 3.
 
STEP 3. Symptom recheck after erasing diagnostic trouble code
Is the check result normal?
Intermittent malfunction
Replace TCM.