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

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 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 scan tool 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 part number of ETACS-ECU
Check the part number of ETACS-ECU.
OK: 8637A213

Q. Is the check result normal?
Go to Step 5.
Replace ETACS-ECU.

STEP 5. Check part number of ABS-ECU
Check the part number of ABS-ECU.
OK: 4670A050

Q. Is the check result normal?
Go to Step 6.
Replace the ABS-ECU.

STEP 6. Check whether the diagnosis code is reset.

Q. Is the diagnosis code No. U1417 set?
Replace the ABS-ECU.
The procedure is complete.