Code No.C1753: ACC/FCM Radar Blockage Detected
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- 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.
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OPERATION
The ACC/FCM-ECU monitors whether the radar is contaminated or its beam is blocked by foreign material.
DIAGNOSIS CODE SET CONDITION
This diagnosis code is set when the abnormality below is detected:
- cruise control switch "ON" or FCM switch "ON"
- The ACC/FCM-ECU' radar detection performance is deteriorated or its detection is interfered
PROBABLE CAUSES
- The radar is contaminated by dirt or foreign material, etc.
- Improperly installed ACC/FCM-ECU
- Malfunction of ACC/FCM-ECU
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STEP 1. Check the radar for dirt or foreign material.
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(1)Wipe off the dirt or foreign material from the ACC/FCM-ECU's radar.
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(2)Erase the diagnosis code.
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(3)Drive the vehicle for approx. five minutes.
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(4)Check if the diagnosis code is set.
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Q.
Is diagnosis code No.C1753 set?
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 Go to Step 2
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 This diagnosis is complete(Protection is deactivated)
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STEP 2. Check whether the ACCS/FCM-ECU is installed properly.
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Check whether the ACC/FCM-ECU is installed correctly (Refer to  ).
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Q.
Is the check result normal?
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Go to Step 3
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Reinstall the ACC/FCM-ECU correctly (Refer to ).
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STEP 3. Check whether the diagnosis code is reset.
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Q.
Is diagnosis code No.C1753 set?
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Replace the ACC/FCM-ECU (Refer to ).
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
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