Code No. C2263:
Yaw Rate Offset Threshold Exceed
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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 hydraulic unit assembly (integrated with ASTC-ECU) is replaced, always
carry out the calibration of the steering wheel sensor and the G sensor (Refer to GROUP 35C - On-vehicle
Service).
- When the ACC/FCM-ECU is replaced, calibrate the radar (refer to ).
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OPERATION
ACC/FCM-ECU communicates with the ASTC-ECU via the CAN bus lines.
DIAGNOSIS CODE SET CONDITION
This diagnosis code is set when the abnormality below is detected:
- The yaw rate sensor output value deviates from the actual value.
PROBABLE CAUSES
- Malfunction of the CAN bus line
- ASTC system fault (yaw rate sensor fault)
- 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 perform the CAN bus diagnosis.
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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. Use M.U.T.-III to confirm a diagnosis code of other systems.
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Check if the diagnosis code is set in the ASTC-ECU (Refer to GROUP 35C - Troubleshooting <ASTC-ECU>,
Diagnosis Function).
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Q.
Is the diagnosis code set?
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Troubleshoot the ASTC-ECU diagnosis code (Refer to GROUP 35C - Troubleshooting <ASTC-ECU>, Diagnosis
Code Chart ).
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Go to Step 3.
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STEP 3. M.U.T.-III data list of other systems.
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Check the ASTC-ECU data list (Refer to GROUP 35C - Troubleshooting <ASTC-ECU>,
Data List Reference Table).
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- Item No. 08: Yaw rate sensor
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Q.
Is the check result normal?
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Go to Step 4.
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Replace the hydraulic unit assembly (integrated with yaw rate sensor) (Refer to
GROUP 35C - Hydraulic Unit).
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STEP 4. 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. C2263 set?
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Replace the ACC/FCM-ECU (Refer to ).
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent
Malfunction).
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