If the diagnosis code No.
B2206 is set, always diagnose the CAN bus line.
DIAGNOSTIC FUNCTION
If the registered chassis number is different from the chassis number transmitted on the
CAN bus lines, the ETACS-ECU sets the diagnosis code No. B2206.
JUDGMENT CRITERIA
If the chassis number registered to ETACS-ECU and the chassis number on CAN bus lines
do not match, the ETACS-ECU determines that a problem has occurred.
PROBABLE CAUSES
Chassis number not written
Malfunction of the ETACS-ECU
Malfunction of engine ECU
Malfunction of CAN bus line
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 diagnosis code is set to the engine-ECU.
Q.
Is the diagnosis code set?
Troubleshoot the engine (Refer to GROUP 13A - Troubleshooting ).
Go to Step 3.
STEP 3. Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to the ETACS-ECU.
(1)Write the chassis number to the ETACS-ECU.
(2)Erase the diagnosis code.
(3)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting 
). On
completion, go to Step 3.