Code No.U0100
Engine CAN timeout
caution |
- If the diagnosis
code No. U0100 is set, be sure to diagnose the CAN bus line.
- When replacing the ECU, always check that the communication circuit is normal.
|
DIAGNOSTIC FUNCTION
The combination meter sets diagnosis code No.U0100 when it cannot receive signals from
the engine-ECU.
JUDGEMENT CRITERIA
With the ignition switch is at ON position, the diagnosis code No. U1190 is not stored
and the diagnosis code No. U1195 is not stored, if the communication with engine-ECU cannot
be established for 2500 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 set to the engine-ECU.
Q.
Is the diagnosis code set?
Troubleshoot the engine (Refer to GROUP 13A -
Diagnosis Code Chart
.)
Go to Step 3.
STEP 3. Check the M.U.T.-III Diagnosis code for other systems
Check if the diagnosis code No. U0100 is set to ETACS-ECU.
Q.
Is the diagnosis code set?
Go to Step 4.
Go to Step 5.
STEP 4. Diagnosis code recheck
Check again if the diagnosis code is set to the combination meter.
|
(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 set.
|
Q.
Is the diagnosis code set?
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 set to the combination meter.
|
(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 set.
|
Q.
Is the diagnosis code set?
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
.)