1. Confirm that the following condition is met:

   There is no foreign matter such as dirt on or around the millimeter wave radar sensor assembly.

   • A cover other than the dedicated millimeter wave radar sensor cover is not installed.
   • There is no dirt on the front emblem or millimeter wave radar sensor assembly.
   • An accessory, such as bull bars, a grille guard, etc., which interferes with millimeter radio waves is not installed.
   • There is no sticker or coating applied to the dedicated millimeter wave radar sensor cover.
   • There is no foreign matter between the radar and millimeter wave radar sensor assembly.
2. If any foreign matter is found around the millimeter wave radar sensor assembly, remove it.
3. Turn the ignition switch off.
4. Turn the ignition switch to ON.
5. Check that "Pre-Collision System Radar Sensor Blocked Unavailable Clean Radar Sensor" is no longer displayed on the multi-information display.
6. If "Pre-Collision System Radar Sensor Blocked Unavailable Clean Radar Sensor" is still displayed on the multi-information display, perform beam axis adjustment.

   HINT:

   Beam axis alignment of the millimeter wave radar sensor assembly can be performed using either Triangle Target, Flat Surface Target or Driving Adjustment.

   Triangle Target:

   Flat Surface Target:

   Driving Adjustment:

Cause:

• There is foreign matter such as dirt on or around the millimeter wave radar sensor assembly.

1. Using the Techstream, check "Millimeter-wave Circuit Temperature Protection" in the Data List for Front Radar Sensor.

   

2. If the value of "Millimeter-wave Circuit Temperature Protection" is ON, warm or cool the area around the millimeter wave radar sensor assembly.

Cause:

• The following millimeter wave radar sensor assembly conditions are met:
  • After being subjected to an extremely cold environment, the area around the millimeter wave radar sensor assembly is -30°C (-22°F) or less.
  • After being subjected to an extremely hot environment, the area around the millimeter wave radar sensor assembly is 70°C (158°F) or more.

1. If this Vehicle Control History code is output, clear the Vehicle Control History (RoB), drive the vehicle at 5 km/h (3 mph) or more and then check if this Vehicle Control History code is output again.
2. If output again, check if the voltage between terminals IGB and SGND of the millimeter wave radar sensor assembly is within the specified range.

   

3. Using the Techstream, check "IG Voltage Protection" in the Data List for Front Radar Sensor.

   

4. If the value of "IG Voltage Protection" is ON, check if the voltage between terminals IGB and SGND of the millimeter wave radar sensor assembly is within the specified range.

   

Cause:

• The following millimeter wave radar sensor assembly conditions are met:
  • The input voltage decreases to approximately 8 V or less directly after the engine is started.
  • The input voltage increases to approximately 16 V or more directly after the engine is started.