Code No.B2206 Chassis No. mismatch


caution
  • If diagnosis code No. B2206 is stored, always diagnose the CAN bus line.
  • Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
  • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in Immobilizer System - How to Register Key ID .)

DIAGNOSTIC FUNCTION


If the chassis number which is stored in the ETACS-ECU does not correspond to that which is stored in the engine-ECU, diagnosis code No.B2206 will be stored.

JUDGEMENT CRITERIA


If the chassis number which is stored in the ETACS-ECU does not correspond to that which is stored in the engine-ECU, the ETACS-ECU will determine that the system is defective.

PROBABLE CAUSES



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. Check the chassis numbers which have been stored in the engine-ECU.


Check whether the chassis numbers which have been stored in the engine-ECU correspond to the actual chassis number written on the vehicle document.

Q. Is the check result normal?

Go to Step 3.

Troubleshoot the engine-ECU (Refer to GROUP 13A - Diagnosis Code Chart <2000, 2400>, GROUP 13B - Troubleshooting <3000>).

STEP 3. Check whether the diagnosis code is stored again.


Check again if the diagnosis code is stored in the ETACS-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Check if diagnosis code is stored.

Q. Is the diagnosis code stored?

Replace with the coded ETACS-ECU.

The diagnosis is complete.