Code No.B2356 ECU Internal Error (ROM)
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Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
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DIAGNOSTIC FUNCTION
If a trouble occurs in AFS-ECU, AFS warnings are displayed on the multi information display and code No. B2356 is stored.
JUDGMENT CRITERIA
AFS-ECU determines that the abnormality is present, if the data abnormality is found when the ignition switch is turned ON and then ROM is written.
PROBABLE CAUSE
Malfunction of the AFS-ECU
DIAGNOSIS PROCEDURE
Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to AFS-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)Check if diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace the AFS-ECU.
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction 
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