Toyota Yaris: Dynamic Radar Cruise Control System / Problem Symptoms Table

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / Cruise Control / Dynamic Radar Cruise Control System / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

  • Before replacing the ECM, refer to Service Bulletin.
  • When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle and a DTC may be stored.
  • When the millimeter wave radar sensor assembly has been replaced with a new one, it is necessary to perform millimeter wave radar sensor assembly beam axis alignment and to clear the vehicle control history. Before performing the Driving Adjustment, make sure to read Before Starting Driving 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: Click here

    Flat Surface Target: Click here

    Driving Adjustment: Click here

  • When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle and a DTC may be stored.
  • When the forward recognition camera is replaced with a new one or the windshield glass is replaced or removed/installed, make sure to read Before Starting Adjustment, then perform optical axis alignment for the forward recognition camera and clear the vehicle control history for each system.

    HINT:

    Forward recognition camera axis alignment can be performed by using either One Time Recognition, Sequential Recognition or Driving Adjustment.

    One Time Recognition: Click here

    Sequential Recognition: Click here

    Driving Adjustment: Click here

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.
  • Determine the problem systems, then perform the respective inspection procedures.
  • By using the vehicle control history, various control parameter history can be checked.
Dynamic Radar Cruise Control System

Symptom

Suspected Area

Link

The dynamic radar cruise control system cannot be turned on using the cruise control main switch

CAN communication system

Steering pad switch circuit

Cruise main indicator light circuit

Millimeter wave radar sensor assembly

ECM

The dynamic radar cruise control mode cannot be changed between vehicle-to-vehicle distance control mode and constant speed control mode

CAN communication system

Steering pad switch circuit

ECM

The vehicle-to-vehicle distance cannot be changed

CAN communication system

Distance control switch circuit

Forward recognition camera

Vehicle speed setting cannot be performed (in constant speed control mode)

Fail-safe chart

CAN communication system

Steering pad switch circuit

Stop light switch circuit

Manual transaxle system

Vehicle stability control system

Millimeter wave radar sensor assembly

ECM

Vehicle speed setting cannot be performed (in vehicle-to-vehicle distance control mode)

Front Radar Sensor Temporary Unavailable (Optical Axis Misalignment) history

Fail-safe chart

Forward recognition camera is temporarily unavailable

Millimeter wave radar sensor assembly is dirty

Millimeter wave radar sensor assembly beam axis not adjusted

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

CAN communication system

Steering pad switch circuit

Neutral Position Switch Circuit

Manual transaxle system

Millimeter wave radar sensor assembly

Forward recognition camera

Vehicle stability control system

ECM

Control of vehicle speed by the dynamic radar cruise control system is canceled (in constant speed control mode)

Fail-safe chart

CAN communication system

Steering pad switch circuit

Stop light switch circuit

Manual transaxle system

Vehicle stability control system

ECM

Control of vehicle speed by the dynamic radar cruise control system is canceled (in vehicle-to-vehicle distance control mode)

Fail-safe chart

Forward recognition camera is temporarily unavailable

Millimeter wave radar sensor assembly is dirty

Millimeter wave radar sensor assembly beam axis not adjusted

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

CAN communication system

Steering pad switch circuit

Manual transaxle system

Millimeter wave radar sensor assembly

Forward recognition camera

Vehicle stability control system

ECM

Hunting/vehicle speed is not constant (in constant speed control mode)

CAN communication system

Vehicle stability control system

ECM

Hunting/vehicle speed is not constant (in vehicle-to-vehicle distance control mode)

Millimeter wave radar sensor assembly is dirty

Millimeter wave radar sensor assembly beam axis not adjusted

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

CAN communication system

Vehicle stability control system

Millimeter wave radar sensor assembly

ECM

Vehicle speed control by the dynamic radar cruise control system is not canceled when the CANCEL switch is pushed

Steering pad switch circuit

ECM

Moving the shift lever does not cancel control of vehicle speed by the dynamic radar cruise control system

ECM

Neutral Position Switch Circuit

Depressing the brake pedal does not cancel control of vehicle speed by the dynamic radar cruise control system

Stop light switch circuit

ECM

Depressing the clutch pedal does not cancel control of vehicle speed by the dynamic radar cruise control system

ECM

Even though the millimeter wave radar sensor assembly and forward recognition camera are not dirty, the warning message "Radar Cruise Control Unavailable See Owner's Manual" is displayed

Millimeter wave radar sensor assembly

Forward recognition camera

The vehicle approach warning buzzer does not sound

Meter / gauge system

Check millimeter wave radar sensor assembly installation position

Check installation of forward recognition camera

Forward recognition camera

Millimeter wave radar sensor assembly

Even though the vehicle approach warning buzzer is sounding, brake control is not performed to decelerate the vehicle

Vehicle stability control system

CAN communication system

Millimeter wave radar sensor assembly

ECM

Even though the SET function is operating, the cruise SET indicator does not illuminate

CAN communication system

Cruise SET indicator light circuit

ECM

The cruise control indicator remains illuminated

CAN communication system

Cruise main indicator light circuit

ECM

Indicators are not displayed on the multi-information display in the combination meter assembly

CAN communication system

ECM

A buzzer does not sound when control of vehicle speed by the dynamic radar cruise control is canceled

CAN communication system

ECM

    Operation Check

    OPERATION CHECK INPUT SIGNAL CHECK (a) Connect the GTS to the DLC3. (b) Check the steering pad switch assembly using the Data List function of the GTS (cruise control main switch, -SET switch, +RES switch and CANCEL switch)...

    Terminals Of Ecu

    TERMINALS OF ECU CHECK ECM HINT: The standard voltage, resistance and waveform between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals are also indicated...

    Other information:

    Toyota Yaris XP210 (2020-2022) Reapir and Service Manual: Replacement


    REPLACEMENT PROCEDURE 1. REPLACE RING PIN NOTICE: It is not necessary to remove the ring pins unless they are being replaced. (a) Remove the 10 ring pins. (b) Using a plastic hammer, install 10 new ring pins. *a 14 mm (0.551 in.) *b 12 mm (0...

    Toyota Yaris XP210 (2020-2022) Owner's Manual: Selecting the Airflow Mode


    D..

    Categories

    Break-In Period

    No special break-in is necessary, but a few precautions in the first 600 miles (1,000 km) may add to the performance, economy, and life of the vehicle.

    Do not race the engine. Do not maintain one constant speed, either slow or fast, for a long period of time. Do not drive constantly at full-throttle or high engine rpm for extended periods of time. Avoid unnecessary hard stops. Avoid full-throttle starts.

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