Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM1000000021JCJ
Model Year Start: 2022 Model: RAV4 Prod Date Range: [12/2021 - 10/2022]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM: PROBLEM SYMPTOMS TABLE; 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]

PROBLEM SYMPTOMS TABLE

NOTICE:

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:

  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.
  • The pre-collision system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.

Pre-Collision System

Symptom

Suspected Area

Link

"Pre-Collision System Unavailable" 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.

    2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM: VEHICLE CONTROL HISTORY

  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: 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: TARGET ADJUSTMENT(TRIANGLE TARGET)

    Flat Surface Target: 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: TARGET ADJUSTMENT(FLAT SURFACE TARGET)

    Driving Adjustment: 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: DRIVING ADJUSTMENT

  3. Turn the ignition switch off.
  4. Turn the ignition switch to ON.
  5. Check that "Pre-Collision System Unavailable" is not displayed on the multi-information display.

Cause:

  • A determination was made that millimeter wave radar sensor assembly vertical axis was misaligned.

"Pre-Collision System Unavailable Clean Sensor" is displayed

Vehicle control history:

  • X2026: Front Radar Sensor Dirt
  1. Check the vehicle control history of the front radar sensor system.

    2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM: VEHICLE CONTROL HISTORY

  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 Unavailable Clean 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: 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: TARGET ADJUSTMENT(TRIANGLE TARGET)

    Flat Surface Target: 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: TARGET ADJUSTMENT(FLAT SURFACE TARGET)

    Driving Adjustment: 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: DRIVING ADJUSTMENT

Cause:

  • The millimeter wave radar sensor assembly is dirty or obstructed by foreign matter.

"Pre-Collision System Unavailable" 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.

    2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM: VEHICLE CONTROL HISTORY

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

    2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM: DATA LIST / ACTIVE TEST

  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:

  • 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" 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.

    2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM: VEHICLE CONTROL HISTORY

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

    2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM: DATA LIST / ACTIVE TEST

  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.

    2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM: TERMINALS OF ECU

Cause:

  • 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" 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.

    2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM: VEHICLE CONTROL HISTORY

  2. Move the vehicle to a different location until "Pre-Collision System Unavailable" disappears from the multi-information display.

Cause:

  • 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)

2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ Vacuum Brake Booster): HOW TO PROCEED WITH TROUBLESHOOTING

Electronically controlled brake system (w/o Vacuum Brake Booster)

2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): HOW TO PROCEED WITH TROUBLESHOOTING

Pre-collision system cannot be canceled (PCS warning light does not illuminate)

Combination meter assembly (check if indicator illuminates using Active Test)

2021 - 2022 MY RAV4 RAV4 HV [08/2020 - 10/2022]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: DATA LIST / ACTIVE TEST

Meter / gauge system

2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

Steering pad switch assembly

2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; STEERING COLUMN: STEERING PAD SWITCH: REMOVAL

Combination meter assembly

2019 - 2022 MY RAV4 RAV4 HV [11/2018 - 10/2022]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL

  • *1: for HV Model
  • *2: for Gasoline Model