Code No. U1417 Variant coding value invalid (includes faulty installation)

caution

If diagnosis code U1417 is set in ABS-ECU, always diagnose the CAN bus lines. If there is any fault in the CAN bus lines, an incorrect diagnosis code may be set. In this case, the set diagnosis code is not highly reliable.
Before replacing the ECU, ensure that the communication circuit is normal.
When the diagnosis code U1417 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.

DIAGNOSIS CODE SET CONDITIONS

ABS-ECU communicates with ETACS-ECU via CAN bus lines. This diagnosis code is set when there is difference between the vehicle information from the ETACS-ECU and the vehicle information stored in the ABS-ECU.

PROBABLE CAUSES

Malfunction of ETACS-ECU
ETACS-ECUs have been interchanged between two vehicles.
ABS-ECU malfunction
External noise interference
ABS-ECUs have been interchanged between two vehicles.

DIAGNOSTIC 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 3.

	Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnosis table ). On completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting CAN bus lines

Q. Is the diagnosis code No. U1417 set?

	Go to Step 3.

	The procedure is complete.

STEP 3. M.U.T.-III other system diagnosis code

Use M.U.T.-III to check whether the ETACS-ECU-related or engine ECU-related diagnosis code is set or not.

Q. Is any diagnosis code set?

	Troubleshoot for the relevant diagnosis code.

	Go to Step 4.

STEP 4. Check ETACS coding data

Refer to GROUP 00 - Coding List

Q. Is the check result normal?

	Go to Step 5.

	Replace ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ). Then go to Step 7.

STEP 5. Check part number of ABS-ECU

Check the part number of ABS-ECU.

Q. Is the check result normal?

	Go to Step 6.

	Replace the hydraulic unit (ABS-ECU) (Refer to ). Then go to Step 7.

STEP 6. Check whether the diagnosis code is reset.

Q. Is the diagnosis code No.U1417 set?

	Replace the hydraulic unit (ABS-ECU) (Refer to ). Then go to Step 7.

	The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 7. Check whether the diagnosis code is reset.

Q. Is the diagnosis code No.U1417 set?

	Return to Step 1.

	This diagnosis is complete.