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 tyre size information sent from the ETACS.

DIAGNOSIS CODE SET CONDITIONS

This diagnosis code is set when the tyre 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 diagnostics

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 any 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)Turn the ignition switch to the "ON" position.

(2)Turn the ignition switch to the "OFF" position.

(3)Check that the ABS warning lamp goes out when the ignition switch is turned to the "ON" position.

Q. Is the diagnosis code No.U1415 set?

	Replace the hydraulic unit (ABS-ECU) (Refer to ). 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)Turn the ignition switch to the "ON" position.

(2)Turn the ignition switch to the "OFF" position.

(3)Check that the ABS warning lamp goes out when the ignition switch is turned to the "ON" position.

Q. Is the diagnosis code No.U1415 set?

	Go to Step 5.

	The procedure is complete.

STEP 5. Check whether the diagnosis code is reset.

Q. Is the diagnosis code No.U1415 set?

	Return to Step 1.

	The procedure is complete.