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DTC U0100: Engine CAN timeout
 
 
caution
  • If diagnostic trouble code No. U0100 is set, be sure to diagnose the CAN bus line.
  • Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
 
 
TROUBLE JUDGMENT
If signal from the ECM cannot be received for 2,500 milliseconds or more, the camera-ECU sets DTC No. U0100.
note"Thunder" mark is displayed on the vehicle icon when DTC No. U0100 is set.
 
 
TROUBLESHOOTING HINTS
  • The ECM may be defective
  • The camera-ECU may be defective
  • The CAN bus may be defective
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-III), diagnose the CAN bus line.
Use the scan tool (M.U.T.-III) to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ) and then go to Step 5.
 
STEP 2. Using scan tool (M.U.T.-III), check the diagnostic trouble code.
Check if DTC No. U0141 is set in the camera-ECU.
Is the DTC set?
Troubleshoot DTC No. U0141 (Refer to ).
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-III), read the ASC system diagnostic trouble code.
Check if DTC No. U0100 is set in the ASC-ECU.
Is the DTC set?
Go to Step 4.
Go to Step 5.
 
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set in the camera-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if DTC is set.
Is the DTC set?
Replace the ECM.
A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the camera-ECU and the ECM. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)
 
STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set in the camera-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if DTC is set.
Is the DTC set?
Replace the camera-ECU. (Refer to )
A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the camera-ECU and the ECM. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)