Code No. C1707 Implausible coding data


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.
  • Whenever the ECU is replaced, ensure that the communication circuit is normal.

OPERATION


FCM/LDW/AHB-ECU receives the vehicle information stored in ETACS-ECU via CAN bus lines.

DIAGNOSIS CODE SET CONDITION


This diagnosis code is set when the abnormality below is detected:

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


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


Use M.U.T.-III to perform the CAN bus diagnosis.

Q. Is the check result normal?

Go to Step 2

Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ).

STEP 2. ETACS-ECU coding data check


Using the M.U.T.-III, check if there is the FCM type2, LDW Parameter status abnormality to the coding data stored in the ETACS-ECU (Refer to GROUP 00 - Coding Reference Table ).

Q. Is the check result normal?

Go to Step 3

Go to Step 4

STEP 3. Check whether the diagnosis code is set again.


Check again if the diagnosis code is set in the FCM/LDW/AHB-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Check if diagnosis code is set.

Q. Is the diagnosis code set?

Replace the FCM/LDW/AHB-ECU (Refer to ).

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction).

STEP 4. Check whether the diagnosis code is set again.


Check again if the diagnosis code is set in the FCM/LDW/AHB-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Check if diagnosis code is set.

Q. Is the diagnosis code set?

Repair the coding data or replace ETACS-ECU (Refer to GROUP 54A - ETACS-ECU).

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction).