Code No.U0126 SAS CAN timeout
caution |
- If diagnosis code No.U0126 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 steering wheel sensor cannot be received for 2500 milliseconds or more, the camera-ECU sets diagnosis code No.U0126.
note |
"Thunder" mark is displayed on the vehicle icon when diagnosis code No.U0126 is set.
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PROBABLE CAUSES
- Malfunction of steering wheel sensor (column switch assembly)
- 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.U0126 is set in the FCM-ECU.
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 steering wheel sensor. (column switch assembly, Refer to
.)
A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the camera-ECU and the steering wheel sensor. (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 steering wheel sensor. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction
.)