Code No.C1707 Implausible coding data


caution
  • Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
  • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in Immobilizer System - How to Register Key ID .)

DIAGNOSTIC FUNCTION



JUDGEMENT CRITERIA




  • "LDW equipment status": Not Present
  • "LDW Parameter status": Not parameter
  • "LDW production setup status": Not Present

PROBABLE CAUSES



  • Malfunction of the CAN bus line.
  • Malfunction of the ETACS-ECU (you have substituted another ECU from a different vehicle, or the coding data is incorrect).
  • Malfunction of the LDW-ECU

DIAGNOSIS PROCEDURE


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



Q. Is the check result normal?





STEP 2. M.U.T.-III other system diagnosis code



Q. Is the diagnosis code set?





STEP 3. Check the coding data in the ETACS-ECU.


(1)Use M.U.T.-III to read out the coding data in ETACS-ECU. (Refer to GROUP 00 - Precautions before Service - Coding Reference Table .)
(2)Check the followings:

  • "LDW equipment status" is set to a correct value ("Type B").
  • "LDW Parameter status" is set to a correct value ("Type 5" or "Type 6").
  • "LDW production setup status" is set to a correct value ("Type B").

Q. Is the check result normal?





STEP 4. Check whether the diagnosis code is reset.



(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?