If
the diagnosis code No. B2206 is set, 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 set.
JUDGMENT 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
Chassis number not written
Malfunction of the ETACS-ECU
Malfunction of engine-ECU
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, Troubleshooting ).
STEP 3. Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to the ETACS-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
.)
