Code No. U1415 Variant coding not implemented



caution
  • 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, Trouble code diagnosis ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
  • When the diagnosis code No.U1415 is set in ASC-ECU, the diagnosis code may also be set in ETACS-ECU. When the diagnosis code is set in ETACS-ECU, carry out the diagnosis of the diagnosis code for ETACS-ECU first.
  • When the hydraulic unit (integrated with ASC-ECU) is replaced, always carry out the calibration of the steering wheel sensor, the G and yaw rate sensor and brake fluid pressure sensor (Refer to , and ).

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.
  • ASC-ECU malfunction

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 Diagnosis 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.B222C 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 ignition switch to the "OFF" position.
(3)Turn the ignition switch to the "ON" position.
(4)Check that the ABS warning lamp goes out.
note If the diagnosis code No.U1415 is not deleted, the ABS warning lamp keeps illuminating.

Q. Is the diagnosis code No.U1415 set?

Replace the hydraulic unit (ASC-ECU) (Refer to ), and then go to Step 4.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 4. Check whether the diagnosis code is reset.


(1)Erase the diagnosis code.
(2)Turn the ignition switch to the "OFF" position.
(3)Turn the ignition switch to the "ON" position.
(4)Check that the ABS warning lamp goes out when the ignition switch is turned to the "ON" position.
note If the diagnosis code No.U1415 is not deleted, the ABS warning lamp keeps illuminating.

Q. Is the diagnosis code No.U1415 set?

Go to Step 5.
This diagnosis is complete.

STEP 5. Check whether the diagnosis code is reset.


Q. Is the diagnosis code U1415 set?

Return to Step 1.
The procedure is complete.