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DTC C1707: Implausible Coding Data
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC 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 DTC No.C1707 is stored in AWC-ECU, the DTC may also be stored in ETACS-ECU. When the DTC is stored in ETACS-ECU, perform the diagnosis of the DTC for ETACS-ECU first.
 
 
OPERATION
AWC-ECU receives the vehicle information stored in ETACS-ECU via CAN bus lines.
 
 
DTC SET CONDITION
This DTC is stored when the abnormality below is detected:
  • The vehicle information received from ETACS-ECU is not correct.
 
 
PROBABLE CAUSES
  • Malfunction of the CAN bus line
  • ETACS-ECU malfunction
  • Malfunction of AWC-ECU
  • ETACS-ECU has been interchanged between two vehicles.

 
 
DIAGNOSTIC PROCEDURE
STEP 1. Scan tool (M.U.T.-III) CAN bus diagnostics.
Use scan tool (M.U.T.-III) to perform the CAN bus diagnosis.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Diagnosis, Can Bus Diagnostics Table ). Then go to Step 3.
 
STEP 2. Check whether the DTC is stored again.
Is DTC No.C1707 stored?
Go to Step 3.
This diagnosis is complete.
 
STEP 3. Scan tool (M.U.T.-III) other system DTC.
Check the ETACS DTC (Refer to GROUP 54A - Diagnosis, Diagnostic Trouble Code Chart ).
Is the DTC stored?
Perform the relevant troubleshooting.
Go to Step 4.
 
STEP 4. ETACS-ECU coding data check
Using the scan tool (M.U.T.-III), check if there is the engine-related, transaxle-related, ASC-related abnormality to the coding data stored in the ETACS-ECU (Refer to GROUP 00 - Coding List ).
Is the check result normal?
Go to Step 5.
Repair the coding data or replace ETACS-ECU. Then go to Step 7.
 
STEP 5. Check the part number of ETACS-ECU
Check the part number of ETACS-ECU.
Is the check result normal?
Go to Step 6.
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ), and then go to Step 6.
 
STEP 6. Check whether the DTC is stored again.
Is DTC No.C1707 stored?
Replace the AWC-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 DTC is stored again.
Is DTC No.C1707 stored?
Return to Step 1.
This diagnosis is complete.