Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GZ0T
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM (for HV Model): VEHICLE CONTROL HISTORY; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

VEHICLE CONTROL HISTORY

NOTICE:

When checking the Vehicle Control History, make sure to record the output codes. Then, clear the Vehicle Control History (RoB) and check it again.

CHECK VEHICLE CONTROL HISTORY (FRONT RADAR SENSOR SYSTEM)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Front Radar Sensor / Utility / Vehicle Control History (RoB).

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.

If this Vehicle Control History code is stored, clear the Vehicle Control History (RoB) after performing front beam axis adjustment, and then check that this code is not output again.

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT

-

X2024

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

History of millimeter wave radar sensor assembly beam axis misalignment (vertical).

Stored when the vehicle is being driven and the vertical beam axis is calibrated.

-

X2025

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

History of millimeter wave radar sensor assembly beam axis misalignment (horizontal).

Stored when the vehicle is being driven and the horizontal beam axis is calibrated.

Pre-Collision System Unavailable Clean 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. 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 radar sensor cover.
    • There is no foreign matter between the radar and radar sensor cover.
  2. If any foreign matter is found around the millimeter wave radar sensor assembly, remove it.
  3. Turn the power switch off.
  4. Turn the power switch on (IG).
  5. Check that "Pre-Collision System Unavailable Clean Sensor" is no longer displayed on the multi-information display.
  6. If "Pre-Collision System Unavailable Clean Sensor" is still displayed on the multi-information display, perform beam axis adjustment.

    2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT

Cause:

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

Pre-Collision System Unavailable

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

    2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM (for HV Model): DATA LIST / ACTIVE TEST

  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

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. 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.

    2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM (for HV Model): TERMINALS OF ECU

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

    2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM (for HV Model): DATA LIST / ACTIVE TEST

  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.

    2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM (for HV Model): 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 starts.
    • The input voltage decreases to approximately 16 V or more directly after the hybrid system starts.

CLEAR VEHICLE CONTROL HISTORY (FRONT RADAR SENSOR SYSTEM)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Front Radar Sensor / Utility / Vehicle Control History (RoB).

Body Electrical > Front Radar Sensor > Utility

Tester Display

Vehicle Control History (RoB)

(e) According to the display on the Techstream, clear the 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 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for HV Model): VEHICLE CONTROL HISTORY