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 ETACS-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 5.
STEP 2. M.U.T.-III diagnosis code
Check if diagnosis code No.U0141 is set in the camera-ECU.
Q.
Is the diagnosis code set?
Troubleshoot the diagnosis code No.U0141 (Refer to 
).
Go to Step 3.
STEP 3. M.U.T.-III other system diagnosis code
Check if diagnosis code No.U0100 is set in the ASC-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 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>, GROUP
13D - Engine-ECU <4N1> or GROUP 13E - Engine-ECU <4J1>.)
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 5. 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.)