Code No.C1752: ACC/FCM Radar Temperature out of Range


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 CAN bus lines are normal.

OPERATION



DIAGNOSIS CODE SET CONDITION




  • cruise control switch "ON" or FCM switch "ON"
  • Control is cancelled in order to protect the ACC/FCM-ECU.
  • The temperature which the ACC/FCM-ECU detects at the radar is below -30°C or over 95°C.

PROBABLE CAUSES



  • The ACC/FCM-ECU remains protected.
  • Severe driving condition (e.g. driving under high load)
  • Malfunction of ACC/FCM-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check the radar temperature (high or low).
(1)Turn the ignition switch to "LOCK" (OFF) position and then wait for a while so that the radar at the ACC/FCM-ECU remains at appropriate temperature.
(2)Erase the diagnosis code.
(3)Check if the diagnosis code is set.

Q. Is diagnosis code No.C1752 set?
Go to Step 2
This diagnosis is complete(Protection is deactivated)

STEP 2. M.U.T.-III data list
Check the following data list (Refer to ).

  • Item No.02: Radar temperature

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the ACC/FCM-ECU (Refer to ).