Code No.B2206 Chassis No. mismatch
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- If diagnosis code No.B2206 is set in the ETACS-ECU, diagnose the CAN main bus line.
- Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
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JUDGEMENT CRITERIA
If the chassis number registered to ETACS-ECU and the chassis number on CAN bus lines do not match, the ETACS-ECU stores diagnosis code No. B2206.
PROBABLE CAUSES
- Malfunction of CAN bus line
- Malfunction of engine-ECU
- The ETACS-ECU, which was used on another vehicle, is installed on this vehicle.
- The ETACS-ECU improperly coding or incorrect chassis number
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 
). On completion, go to Step 3.
STEP 2. M.U.T.-III other system diagnosis code
Check if a chassis number-related diagnosis code is stored in the engine-ECU.
Q.
Is the diagnosis code stored?
Troubleshoot the engine-ECU (Refer to GROUP 13A, Troubleshooting ).
Go to Step 3.
STEP 3. Check whether the diagnosis code is stored again.
Replace the ETACS-ECU with a properly coded one. Then check if a diagnosis code is stored again.
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(1)Replace the ETACS-ECU with a properly coded one.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(4)Check if diagnosis code is stored.
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Q.
Is the diagnosis code stored?
Return to Step 1.
The diagnosis is complete.