Code No.U0100 Engine CAN timeout
caution |
- If diagnosis code No. U0100 is stored, be sure to diagnose the CAN bus line.
- Before replacing the ECU or combination meter, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
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DIAGNOSTIC FUNCTION
The combination meter stores diagnosis code No.U0100 when it cannot receive signals from the engine-ECU.
JUDGEMENT CRITERIA
With the ignition switch is at ON position, diagnosis code No. U1190 is not stored, if the communication with engine-ECU cannot be established for 5000 ms or more, the combination meter determines that a problem has occurred.
PROBABLE CAUSES
- Malfunction of CAN bus line
- Malfunction of engine-ECU
- Malfunction of combination meter
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).
STEP 2. M.U.T.-III other system diagnosis code
Check if diagnosis code is stored in the engine-ECU.
Q.
Is the diagnosis code stored?
Troubleshoot the engine (Refer to GROUP 13A - Diagnosis Code Chart <2000, 2400>, GROUP 13B -Troubleshooting <3000>)
Go to Step 3.
STEP 3. Check the M.U.T.-III Diagnosis code for other systems
Check if diagnosis code No. U0100 is stored in ETACS-ECU.
Q.
Is the diagnosis code stored?
Go to Step 4.
Go to Step 5.
STEP 4. Diagnosis code recheck
Check again if the diagnosis code is stored in the combination meter.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
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(3)Check if the diagnosis code is stored.
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Q.
Is the diagnosis code stored?
Replace the engine-ECU.
A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the combination meter and the engine-ECU. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)
STEP 5. Diagnosis code recheck
Check again if the diagnosis code is stored in the combination meter.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
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(3)Check if the diagnosis code is stored.
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Q.
Is the diagnosis code 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 engine-ECU. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)