Code No. C1751:
ACC/FCM ECU Failure
Code No. C2296: CAN Buffer Error
Code No. C2297: CAN Transmit
Error
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- If there is any problem in the
CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the
CAN bus lines (Refer to GROUP 54C -
Troubleshooting
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- Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
- When the ACC/FCM-ECU is replaced, calibrate the radar (refer to ).
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OPERATION
ACC/FCM-ECU monitors the malfunction in the ECU.
DIAGNOSIS CODE SET CONDITION
This diagnosis code is set when the abnormality below is detected:
- A malfunction is detected inside the ACC/FCM-ECU.
PROBABLE CAUSES
- Malfunction of the CAN bus line
- Malfunction of the ACC/FCM-ECU
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STEP 1. M.U.T.-III CAN bus diagnostics.
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Use M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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 Go to Step 2.
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 Repair the CAN bus lines (Refer to GROUP 54C -
Troubleshooting ).
On completion, go to Step 2.
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STEP 2. Check whether the diagnosis code is set again.
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Check again if the diagnosis code is set in the ACC/FCM-ECU.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(4)Press the ACC ON/OFF switch to turn the ACC system to ON.
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(5)On completion, check that the diagnosis code is set again.
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Q.
Is diagnosis code No. C1751, C2296 or C2297 set?
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Replace the ACC/FCM-ECU (Refer to ).
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This diagnosis is complete.
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