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



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, CAN Bus Diagnostics Table ).
  • If diagnosis code No.U1417 is set in ASC-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 diagnosis code No.U1417 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 ).

OPERATION


ASC-ECU receives the vehicle information stored in the ETACS-ECU via CAN bus lines.

DIAGNOSIS CODE SET CONDITIONS


ASC-ECU communicates with ETACS-ECU via CAN bus lines. This diagnosis code is set when the vehicle information received from the ETACS-ECU is invalid.

PROBABLE CAUSES



  • Malfunction of ETACS-ECU
  • Malfunction of engine ECU
  • ETACS-ECUs have been interchanged between two vehicles.
  • Malfunction of ASC-ECU
  • External noise interference
  • ASC-ECUs have been interchanged between two vehicles.

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 3.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ). On completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting CAN bus lines


Q. Is diagnosis code No.U1417 set?

Go to Step 3.
This diagnosis is complete.

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


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

Q. Is the diagnosis code set?

Troubleshoot for the relevant diagnosis code, and then go to Step 9
Go to Step 4.

STEP 4. ETACS-ECU coding data check


Refer to GROUP 00 - Coding List .

Q. Is the check result normal?

Go to Step 5.
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ), and then go to Step 7.

STEP 5. Engine ECU coding data check


Refer to GROUP 00 - Coding List .

Q. Is the check result normal?

Go to Step 6.
NO (1600-petrol) : Replace the engine ECU (Refer to GROUP 13D - engine ECU ), and then go to Step 7.
NO (1800, 2000-petrol) : Replace the engine ECU (Refer to GROUP 13A - engine ECU ), and then go to Step 7.
NO (1800-diesel) : Replace the engine ECU (Refer to GROUP 13B - engine ECU ), and then go to Step 7.

STEP 6. Check the part number of ETACS-ECU


Check the part number of ETACS-ECU.

Q. Is the check result normal?

Go to Step 7.
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ), and then go to Step 7.

STEP 7. Check the part number of ASC-ECU


Check the part number of ASC-ECU.

Q. Is the check result normal?

Go to Step 8.
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ), and then go to Step 9.

STEP 8. Check whether the diagnosis code is reset.


Q. Is diagnosis code No.U1417 set?

Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ), and then go to Step 9.
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions ).

STEP 9. Check whether the diagnosis code is reset.


Q. Is diagnosis code No.U1417 set?

Return to Step 1.
This diagnosis is complete.