Toyota Yaris: Front Radar Sensor System / Vehicle Control History

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Engine & Hybrid System / Cruise Control / Front Radar Sensor System / Vehicle Control History

VEHICLE CONTROL HISTORY

NOTICE:

Vehicle control history may be recorded due to the replacement or repair of related parts.

CHECK VEHICLE CONTROL HISTORY (FRONT RADAR SENSOR SYSTEM)

(a) According to the display on the GTS, check the vehicle control history.

Body Electrical > Front Radar Sensor > Utility

Tester Display

Vehicle Control History (RoB)
Vehicle Control History (RoB)

Multi-information Display

Code

Tester Display

Description

Diagnostic Note

Pre-Collision System Malfunction Visit Your Dealer

X2023

Front Radar Sensor Optical Axis Not Adjusted

History of millimeter wave radar sensor assembly beam axis not being adjusted.
  1. Using the GTS, check "Optical Axis Not Adjusted Status" in the Data List for Front Radar Sensor.

  2. If the value of "Optical Axis Not Adjusted Status" is Not Complete, 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: Click here

    Flat Surface Target: Click here

    Driving Adjustment: Click here

Pre-Collision System Radar In Self Calibration Unavailable See Owner's Manual

X2024

Front Radar Sensor Temporary Unavailable (Vertical Direction Optical Axis Misalignment)

History of millimeter wave radar sensor assembly beam axis misalignment (vertical).
  1. 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: Click here

    Flat Surface Target: Click here

    Driving Adjustment: Click here

  2. Turn the ignition switch off.
  3. Turn the ignition switch to ON.
  4. Check that "Pre-Collision System Radar In Self Calibration Unavailable See Owner's Manual" 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 Radar Sensor Blocked Unavailable Clean Radar Sensor

X2026

Front Radar Sensor Dirt

History of system operation being temporarily suspended due to millimeter wave radar sensor assembly not being able to detect objects.
  1. 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
  2. Clean away any dirt or foreign matter that is adhering to the area around the millimeter wave radar sensor assembly.
  3. Turn the ignition switch off.
  4. Start the engine and drive the vehicle for 5 minutes or more.
  5. Check whether "Pre-Collision System Radar Sensor Blocked Unavailable Clean Radar Sensor" is displayed on the multi-information display.
  6. 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: Click here

    Flat Surface Target: Click here

    Driving Adjustment: Click here

Cause:
  • 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

X2027

Front Radar Sensor Outside Guaranteed Operating Temperature

History of system operation being temporarily suspended due to the millimeter wave radar sensor assembly being excessively hot or cold.
  1. Using the GTS, 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.

Pre-Collision System Unavailable See Owner's Manual

X2028

Front Radar Sensor Outside Guaranteed Operating Voltage

History of system operation being temporarily suspended due to millimeter wave radar sensor assembly power source voltage being excessively high or low.
  1. Using the GTS, check "IG Voltage Protection" in the Data List for Front Radar Sensor.

  2. 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.

  3. As power for the millimeter wave radar sensor assembly is supplied by the start and stop system, confirm that the start and stop system is not malfunctioning.

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 starts.
    • The input voltage increases to approximately 16 V or more directly after the engine is starts.

Pre-Collision System Unavailable See Owner's Manual

X202B

Front Radar Sensor Temporary Unavailable (Radio Wave Interference)

Stored when determination made for temporary suspension of system operation due to millimeter wave radar sensor assembly detecting interference from other nearby radar emitters.

Move the vehicle to a different location until "Pre-Collision System Unavailable See Owner's Manual" 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.

HINT:

If the system does not return to normal even after moving the vehicle to a different location, there may be a problem with the steering center position. Inspect the steering system components for incorrect installation, deformation, or damage, and perform calibration or replace components as necessary.

Pre-Collision System Malfunction Visit Your Dealer

XF01B

ECU Security Key Not Registered

ECU security key has not been registered

CLEAR VEHICLE CONTROL HISTORY (FRONT RADAR SENSOR SYSTEM)

(a) According to the display on the GTS, clear the Vehicle Control History (RoB).

Body Electrical > Front Radar Sensor > Utility

Tester Display

Vehicle Control History (RoB)

NOTICE:

By performing this procedure, all stored Vehicle Control History will be cleared.

CHECK VEHICLE CONTROL HISTORY (AIRBAG SYSTEM)

HINT:

A part of the control history can be confirmed using the Vehicle Control History.

Click here

    Front Radar Sensor Optical Axis Misalignment Malfunction (C1A1100)

    DESCRIPTION The millimeter wave radar sensor assembly performs self-diagnosis to check for misalignment of its beam axis. If misalignment is detected, the millimeter wave radar sensor assembly stores DTC C1A1100...

    Microwave Integrated Circuit (VCO Circuit) in Front Radar Sensor Internal Electronic Failure (C1A8749-C1A8987,C1A8C08)

    DESCRIPTION When an internal malfunction is detected in the millimeter wave radar sensor assembly, a DTC is stored. DTC No. Detection Item DTC Detection Condition Trouble Area C1A8749 Microwave Integrated Circuit (VCO Circuit) in Front Radar Sensor Internal Electronic Failure When the ignition switch is ON, the millimeter wave radar sensor assembly detects a malfunction in the microwave integrated circuit (VCO circuit)...

    Other information:

    Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Cooling System


    On-vehicle InspectionON-VEHICLE INSPECTION CAUTION / NOTICE / HINT CAUTION: Do not remove the radiator cap sub-assembly while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns...

    Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: System Diagram


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    Categories

    Turning the Engine Off

    Stop the vehicle completely. Manual transaxle: Shift into neutral and set the parking brake.

    Automatic transaxle: Shift the selector lever to the P position and set the parking brake.

    Press the push button start to turn off the engine. The ignition position is off.

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