[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
17 -ENGINE AND EMISSION CONTROL > ADAPTIVE CRUISE CONTROL SYSTEM (ACC) > DIAGNOSIS CODE PROCEDURES > CODE NO. C1707: IMPLAUSIBLE CODING DATA
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.
  • When diagnosis code No.C1707 is set in ACC/FCM-ECU, the diagnosis code may also be set in ETACS-ECU. When the diagnosis code is set 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 .)
  • When the ACC/FCM-ECU is replaced, calibrate the radar (refer to ).
 
 
OPERATION
ACC/FCM-ECU receives the coding data stored in ETACS-ECU via CAN bus lines.
 
 
DIAGNOSIS CODE SET CONDITION
Check Conditions
  • More than 2 seconds have passed since the ignition switch was turned to "ON" position.
  • ACC/FCM-ECU power voltage is more than 9 V and is less than 18 V.
Judgement Criterion
  • The coding data received from ETACS-ECU is not correct for 2.5 seconds.
noteA diagnosis code is not set as a historic fault.
 
 
PROBABLE CAUSES
  • Malfunction of the CAN bus line
  • ETACS-ECU coding fault
  • Malfunction of ETACS-ECU
  • ETACS-ECU has been interchanged between two vehicles.
  • Malfunction of ACC/FCM-ECU

 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE CAN bus diagnostics.
Use M.U.T.-IIISE to perform the CAN bus diagnosis.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting, Can Bus Diagnostics Table ).
 
STEP 2. ETACS-ECU coding data check
Using the M.U.T.-IIISE, check if there is the FCM type, ACC type abnormality to the coding data stored in the ETACS-ECU.
OK:
  • FCM type: Type 1
  • ACC type: Type 3
Is the check result normal?
Go to Step 3.
Repair the coding data or replace ETACS-ECU.
 
STEP 3. Check whether the diagnosis code is set again.
Is diagnosis code No.C1707 set?
Replace the ACC/FCM-ECU (Refer to ).
It can be assumed that this malfunction is intermittent (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunction ).