Code No.C1707: Coding data abnormal


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be stored. Prior to this diagnosis, diagnose the CAN bus lines.
  • Whenever the ECU is replaced, ensure that the communication circuit is normal.
  • When the diagnosis code No.C1707 is stored in 4WD-ECU, the diagnosis code may also be stored in ETACS-ECU. When the diagnosis code is stored in ETACS-ECU, perform the diagnosis of the diagnosis code for ETACS-ECU first.
  • 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 GROUP 54A, Immobilizer System - How to Register Key ID .)

OPERATION


4WD-ECU receives the vehicle information stored in ETACS-ECU via CAN bus lines.

DIAGNOSIS CODE SET CONDITION


This diagnosis code will be stored when the vehicle identification sent by the ETACS-ECU is invalid.

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. Check whether the diagnosis code is stored again.

Q. Is diagnosis code No.C1707 stored?
Replace the 4WD-ECU. (Refer to .) Then go to Step 7.
Go to Step 3

STEP 3. M.U.T.-III other system diagnosis code.
Check the ETACS diagnosis code (Refer to GROUP 54A - Troubleshooting ).

Q. Is the diagnosis code stored?
Perform the relevant troubleshooting.
Go to Step 4

STEP 4. ETACS-ECU coding data check
Check the following coding data which are stored in the ETACS-ECU. (Refer to GROUP 00 - Coding Reference Table ).
Item
  • Handle side
  • Transmission
  • Engine type
  • A.S.C.

Q. Is the check result normal?
Go to Step 5
Repair the coding data or replace ETACS-ECU. (Refer to GROUP 54A - ETACS .) Then go to Step 7.

STEP 5. Check the part number of ETACS-ECU
Check the part number of ETACS-ECU.

Q. Is the check result normal?
Go to Step 6
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ), and then go to Step 7.

STEP 6. Check whether the diagnosis code is stored again.

Q. Is diagnosis code No.C1707 stored?
Replace the 4WD-ECU (Refer to ). Then go to Step 7 .
Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 7. Check whether the diagnosis code is stored again.

Q. Is diagnosis code No.C1707 stored?
Return to Step 1.
This diagnosis is complete.