If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
Whenever ECU is replaced, ensure that the CAN bus lines are normal.
OPERATION
ASC-ECU receives the vehicle information stored in the ETACS-ECU via CAN bus lines.
DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set when the variant coding for ETACS-ECU has not been implemented.
PROBABLE CAUSES
Variant coding for ETACS-ECU has not been implemented.
Malfunction of ASC-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnosis
Use M.U.T.-III to diagnose the CAN bus lines.
Q.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ). On completion, go to Step 4.
STEP 2. M.U.T.-III other system diagnosis code
Use M.U.T.-III to check that the diagnosis code No.B1760 is set in the ETACS-ECU.
Q.
Is the diagnosis code set?
Troubleshoot the relevant diagnosis code, and then go to Step 4.
Go to Step 3.
STEP 3. Check whether the diagnosis code is reset.
(1)Erase the diagnosis code.
(2)Turn the electric motor switch from "LOCK" (OFF) position to "ON" position.
Q.
Is the diagnosis code No.C1640 set?
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ), and then go to Step 4.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).
STEP 4. Check whether the diagnosis code is reset.
(1)Erase the diagnosis code.
(2)Turn the electric motor switch from "LOCK" (OFF) position to "ON" position.
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table 
). On completion, go to Step 4.