DTC C1753: ACC/FCM Radar Blockage Detected: Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. Check the radar for dirt or foreign material.
1. Wipe off the dirt or foreign material from the ACC/FCM-ECU's radar.
  CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
2. Connect scan tool (M.U.T.-III). Refer to "HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) ."
3. Turn the ignition switch to the "ON" position.
4. Erase the diagnostic trouble code.
5. Drive the vehicle for approx. five minutes.
6. Check if the diagnostic trouble code is stored.
7. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is diagnostic trouble code No. C1753 stored?
1. YES: Go to Step 2
2. NO: This diagnosis is complete (Protection is deactivated).
STEP 2. Check whether the ACC/FCM-ECU is installed properly.
Check whether the ACC/FCM-ECU is installed correctly (Refer to ACC/FCM-ECU ).

Q: Is the check result normal?
1. YES: Go to Step 3
2. NO: Reinstall the ACC/FCM-ECU correctly (Refer to ACC/FCM-ECU ).
STEP 3. Check whether the diagnostic trouble code is stored again.
Q: Is diagnostic trouble code No. C1753 stored?
1. YES: Replace the ACC/FCM-ECU (Refer to ACC/FCM-ECU ).
2. NO: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).