Code No. U1415 Variant coding not completed



caution When the diagnosis code U1415 is set in ABS-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.

OPERATION



  • ABS-ECU receives the vehicle information stored in the ETACS-ECU via CAN bus lines.
  • The ABS-ECU stores the tire size information sent from the ETACS.

DIAGNOSIS CODE SET CONDITIONS


This diagnosis code is set when the tire size information is not coded to the ABS-ECU.

PROBABLE CAUSES



  • Variant coding for ETACS-ECU has not been implemented.
  • Malfunction of ABS-ECU.

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnosis


Use scan tool 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 scan tool to check that the diagnosis code B222C is set in the ETACS-ECU.

Q. Is any DTC 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.


Q. Is the diagnosis code U1415 set?

Replace the ABS-ECU. Go to Step 4.
If the trouble symptom is resolved, an intermittent malfunction such as poorly engaged connector(s) or wiring harness is suspected (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 4. Check whether the diagnosis code is reset.


Q. Is the diagnosis code U1415 set?

Return to Step 1.
The procedure is complete.