Code No. C2264: Estimated tyre size 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.
- 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
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- When the FCM-ECU is replaced, calibrate the radar (refer to ).
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DIAGNOSIS CODE SET CONDITION
This diagnosis code is set when the abnormality below is detected:
- The tyre size or inflation pressure(s) is not within the standard value.
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A diagnosis code is not set as a historic fault.
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PROBABLE CAUSES
- The CAN bus line is defective.
- ASTC system fault (vehicle speed sensor fault)
- Mounting of wheels and tyres other than with genuine specified size
- Malfunction of the 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 ).
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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 Diagnosis Code Chart ).
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Q.
Is the diagnosis code set?
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Troubleshoot the ASTC-ECU diagnosis code (Refer to Diagnosis Code Chart ).
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Go to Step 3.
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STEP 3. Check the wheels and the tyres.
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Carry out the following check.
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- Size check of wheels and tyres
- Tyre wear and deterioration statuses
- Check the tyre pressure.
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For the tyre pressure, refer to the tyre pressure label attached to the lower section of driver’s side door striker.
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Q.
Is the check result normal?
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Go to Step 4.
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Correct the wheels and tyres in good condition. Then go to Step 4.
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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 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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(3)Road test the vehicle at 30 km/h or more for at least two minutes on the road where reflectors are located nearby.
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(4)On completion, check that the diagnosis code is set again.
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Q.
Is diagnosis code No. C2264 set?
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Replace the FCM-ECU (Refer to ).
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
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