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DTC U0100: Engine CAN timeout
 
 
caution
  • If the DTC No. U0100 stored, be sure to diagnose the CAN bus line.
  • Before replacing the ECU or combination meter, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
DIAGNOSTIC FUNCTION
The combination meter sets DTC No.U0100 when it cannot receive signals from the engine control module (ECM).
 
 
JUDGMENT CRITERIA
With the ignition switch is at ON position, DTC No. U1190 is not stored, if the communication with ECM cannot be established for 5000 ms or more, the combination meter determines that a problem has occurred.
 
 
TROUBLESHOOTING HINTS
  • The CAN bus line may be defective.
  • The ECM may be defective.
  • The combination meter may be defective.
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-III), diagnose the CAN bus line
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III). Refer to "How to connect the Scan Tool (M.U.T.-III) ."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the CAN bus line found to be normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C, Diagnosis ).
 
STEP 2. Using scan tool (M.U.T.-III), read the ECM diagnostic trouble code
Check if DTC is stored in the ECM.
Is the DTC stored?
Troubleshoot the engine (Refer to GROUP 13A - DTC Chart <2.4 L ENGINE>, GROUP 13B - DTC Chart <3.0 L ENGINE>)
Go to Step 3
 
STEP 3. Using scan tool (M.U.T.-III), read the ETACS diagnostic trouble code.
Check if the DTC No. U0100 stored in ETACS-ECU.
Is the DTC stored?
Go to Step 4
Go to Step 5
 
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is stored in the combination meter.
(1) Erase the DTC.
(2) Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3) Check if the DTC is stored.
Is the DTC stored?
Replace the ECM.
A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the combination meter 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 stored in the combination meter.
(1) Erase the DTC.
(2) Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3) Check if the DTC is stored.
Is the DTC stored?
Replace the combination meter.
A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the combination meter and the ECM. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)