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Problem Symptoms Table [10/2022 - ]

NOTE:

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

HINT: 

PRE-COLLISION SYSTEM

Symptom Suspected Area Link
"Pre-Collision System Radar In Self Calibration Unavailable See Owner's Manual" is displayed Vehicle control history: 
  • X2024: Front Radar Sensor Temporary Unavailable (Vertical Direction Optical Axis Misalignment)
  1. Check the vehicle control history of the front radar sensor system.

    Refer to VEHICLE CONTROL HISTORY [10/2022 - ]

  2. Perform millimeter wave radar sensor assembly beam axis alignment.

    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: Refer to TARGET ADJUSTMENT(TRIANGLE TARGET) [12/2021 - ]

    Flat Surface Target: Refer to TARGET ADJUSTMENT(FLAT SURFACE TARGET) [12/2021 - ]

    Driving Adjustment: Refer to DRIVING ADJUSTMENT [12/2021 - ]

  3. Turn the ignition switch off.
  4. Turn the ignition switch to ON.
  5. Check that "Pre-Collision System Radar In Self Calibration Unavailable See Owner's Manual" is not displayed on the multi-information display.
Cause:
  1. A determination was made that millimeter wave radar sensor assembly vertical axis was misaligned.
"Pre-Collision System Radar Sensor Blocked Unavailable Clean Radar Sensor" is displayed Vehicle control history: 
  • X2026: Front Radar Sensor Dirt
  1. Check the vehicle control history of the front radar sensor system.

    Refer to VEHICLE CONTROL HISTORY [10/2022 - ]

  2. Check whether the millimeter wave radar sensor assembly and surrounding area is dirty or obstructed by foreign matter
    • A non-genuine millimeter wave sensor cover is installed
    • There is dirt on the radar, the radar sensor cover or the surrounding area
    • An accessory, such as bull bars, a grille guard, etc., which interferes with millimeter radio waves is installed
    • The sensor cover or its surrounding area has been painted or has a sticker attached
    • There is foreign matter between the radar and radar sensor cover
  3. Clean away any dirt or foreign matter that is adhering to the area around the millimeter wave radar sensor assembly.
  4. Turn the ignition switch off.
  5. Start the hybrid system and drive the vehicle for 5 minutes or more.*1
  6. Start the engine and drive the vehicle for 5 minutes or more.*2
  7. Check whether "Pre-Collision System Radar Sensor Blocked Unavailable Clean Radar Sensor" is displayed on the multi-information display.
  8. If the message is still displayed, perform beam axis alignment of the millimeter wave radar sensor assembly.

    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: Refer to TARGET ADJUSTMENT(TRIANGLE TARGET) [12/2021 - ]

    Flat Surface Target: Refer to TARGET ADJUSTMENT(FLAT SURFACE TARGET) [12/2021 - ]

    Driving Adjustment: Refer to DRIVING ADJUSTMENT [12/2021 - ]

Cause:
  1. The millimeter wave radar sensor assembly is dirty or obstructed by foreign matter.
"Pre-Collision System Out of Temperature Range Unavailable See Owner's Manual" is displayed Vehicle control history: 
  • X2027: Front Radar Sensor Outside Guaranteed Operating Temperature
  1. Check the vehicle control history of the front radar sensor system.

    Refer to VEHICLE CONTROL HISTORY [10/2022 - ]

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

    Refer to DATA LIST / ACTIVE TEST [12/2021 - ]

  3. If the value of "Millimeter-wave Circuit Temperature Protection" is ON, warm or cool the area around the millimeter wave radar sensor assembly.
Cause:
  1. 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.
"Pre-Collision System Unavailable See Owner's Manual" is displayed Vehicle control history: 
  • X2028: Front Radar Sensor Outside Guaranteed Operating Voltage
  1. Check the vehicle control history of the front radar sensor system.

    Refer to VEHICLE CONTROL HISTORY [10/2022 - ]

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

    Refer to DATA LIST / ACTIVE TEST [12/2021 - ]

  3. 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.

    Refer to TERMINALS OF ECU [12/2021 - ]

Cause:
  1. The following millimeter wave radar sensor assembly conditions are met:
    • The input voltage decreases to approximately 8 V or less directly after the hybrid system is starts.*1
    • The input voltage increases to approximately 16 V or more directly after the hybrid system is starts.*1
    • The input voltage decreases to approximately 8 V or less directly after the engine is starts.*2
    • The input voltage increases to approximately 16 V or more directly after the engine is starts.*2
"Pre-Collision System Unavailable See Owner's Manual" is displayed Vehicle control history: 
  • X202B: Front Radar Sensor Temporary Unavailable (Radio Wave Interference)
  1. Check the vehicle control history of the front radar sensor system.

    Refer to VEHICLE CONTROL HISTORY [10/2022 - ]

  2. Move the vehicle to a different location until "Pre-Collision System Unavailable" disappears from the multi-information display.
Cause:
  1. Determination was made for temporary suspension of system operation due to millimeter wave radar sensor assembly detecting interference from other nearby radar emitters.
"VSC Turned OFF Pre-Collision Brake System Unavailable" is displayed Check whether VSC is off -
Electronically controlled brake system (w/ Vacuum Brake Booster) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]
Electronically controlled brake system (w/o Vacuum Brake Booster) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ]
Pre-collision system cannot be canceled (PCS warning light does not illuminate) Combination meter assembly (check if indicator illuminates using Active Test) Refer to DATA LIST / ACTIVE TEST [10/2022 - ]
Meter / gauge system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]
Steering pad switch assembly Refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]
Combination meter assembly Refer to REMOVAL [10/2022 - ]
  1. *1: for HV Model
  2. *2: for Gasoline Model
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