Code No.U0100: Engine CAN Timeout



caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis 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.

OPERATION




DIAGNOSIS CODE SET CONDITION




  • The signal sent from the engine-ECU cannot be received for a certain period.

PROBABLE CAUSES



  • Malfunction of the CAN bus line
  • Malfunction of power supply circuit system (engine-ECU)
  • Malfunction of ECU (engine-ECU)
  • Malfunction of 4WD-ECU

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics.


Use M.U.T.-III to perform the CAN bus diagnosis.

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. M.U.T.-III other system diagnosis code.


Check the engine diagnosis code (Refer to GROUP 13A -Troubleshooting <4B1>, GROUP 13C -Troubleshooting <4J1>, GROUP 13D -Troubleshooting <4N1>).

Q. Is the diagnosis code set?

Perform the relevant troubleshooting.
Go to Step 3.

STEP 3. Check whether the diagnosis code is reset.


Q. Is diagnosis code No.U0100 set?

Replace the 4WD-ECU (Refer to ). Then go to Step 4.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 4. Check whether the diagnosis code is reset.


Q. Is diagnosis code No.U0100 set?

Return to Step 1.
This diagnosis is complete.