Code No. U0100 Engine CAN timeout
caution |
- If diagnosis 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.
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TROUBLE JUDGEMENT
If signal from the engine-ECU cannot be received for 2500 milliseconds or more, the camera-ECU sets diagnosis code No. U0100.
note |
Thunder" mark is displayed on the vehicle icon when diagnosis code No.U0100 is set.
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PROBABLE CAUSES
- Malfunction of engine-ECU
- Malfunction of camera-ECU
- Malfunction of CAN bus
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
) and then go to Step 4.
STEP 2. M.U.T.-III other system diagnosis code
Check if diagnosis code No. U0100 is set in the combination meter.
Q.
Is the diagnosis code set?
Go to Step 3.
Go to Step 4.
STEP 3. Diagnosis code recheck
Check again if the diagnosis code is set in the camera-ECU.
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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 set.
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Q.
Is the diagnosis code set?
Replace the engine-ECU. (Refer to GROUP 13B - Engine-ECU
<6B3> or GROUP 13C - Engine-ECU
<4N1>.)
A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the camera-ECU and the engine-ECU. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction
.)
STEP 4. Diagnosis code recheck
Check again if the diagnosis code is set in the camera-ECU.
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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 set.
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Q.
Is the diagnosis code 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 engine-ECU. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction
.)