Toyota Yaris: Front Radar Sensor System / How To Proceed With Troubleshooting

Toyota Yaris XP210 (2020-2023) Reapir and Service Manual / Engine & Hybrid System / Cruise Control / Front Radar Sensor System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Before performing troubleshooting for the front radar sensor system, perform troubleshooting for the pre-collision system.

    Click here

  • *: Use the GTS.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

HINT:

  • In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
  • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
  • The following 5 items are important points for problem analysis:

    What

    Vehicle model, system name

    When

    Date, time, occurrence frequency

    Where

    Road conditions

    Under what conditions?

    Driving conditions, weather conditions

    How did it happen?

    Problem symptoms

NEXT

3.

PRE-CHECK

(a) Measure the auxiliary battery voltage.

HINT:

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

Standard Voltage:

11 to 14 V (Ignition switch off)

(b) Check the fuses and relays.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

NEXT

4.

CHECK CAN COMMUNICATION SYSTEM*

(a) Using the GTS, check that the CAN communication system is functioning normally.

Click here

OK:

CAN communication system is functioning normally.

NG

GO TO CAN COMMUNICATION SYSTEM

OK

5.

CHECK FOR DTCs*

(a) Check for DTCs.

Body Electrical > Front Radar Sensor > Trouble Codes

(b) Make a note of any DTCs that are output.

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO DTC CHART

A

6.

CHECK VEHICLE CONTROL HISTORY*

(a) Using the GTS, check for Vehicle Control History.

Body Electrical > Front Radar Sensor > Utility

Tester Display

Vehicle Control History (RoB)

(b) Record any output Vehicle Control History.

Result

Proceed to

Vehicle Control History codes are not output

A

Vehicle Control History code X2026 is output

B

Vehicle Control History codes other than X2026 are output

C

A

GO TO SYMPTOM SIMULATION

B

GO TO VEHICLE CONTROL HISTORY (X2026)

C

7.

RECONFIRM VEHICLE CONTROL HISTORY*

(a) Using the GTS, clear the Vehicle Control History.

Body Electrical > Front Radar Sensor > Utility

Tester Display

Vehicle Control History (RoB)

(b) Using the GTS, check for Vehicle Control History.

Body Electrical > Front Radar Sensor > Utility

Tester Display

Vehicle Control History (RoB)

Result

Proceed to

Vehicle Control History codes are not output

A

Vehicle Control History codes are output

B

A

GO TO SYMPTOM SIMULATION

B

GO TO VEHICLE CONTROL HISTORY

    System Diagram

    S..

    Utility

    UTILITY Front Beam Axis Adjustment HINT: Front Beam Axis Adjustment is used to calibrate the beam axis of millimeter wave radar sensor assembly. (a) Perform Front Beam Axis Adjustment according to the display on the GTS...

    Other information:

    Toyota Yaris XP210 (2020-2023) Reapir and Service Manual: Components


    C..

    Toyota Yaris XP210 (2020-2023) Reapir and Service Manual: Driver Side Door Entry Unlock Function does not Operate


    DESCRIPTION If the entry unlock function does not operate for the driver door only, but the entry lock function operates, the request code is being transmitted properly from the driver door. In this case, there may be a problem related to the unlock sensor (connection between the certification ECU (smart key ECU assembly) and front door outside handle assembly LH)...

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    Supplemental Restraint System (SRS) Precautions

    The front and side supplemental restraint systems (SRS) include different types of air bags. Please verify the different types of air bags which are equipped on your vehicle by locating the “SRS AIRBAG” location indicators. These indicators are visible in the area where the air bags are installed.

    The air bags are installed in the following locations:

    The steering wheel hub (driver air bag) The front passenger dashboard (front passenger air bag) The outboard sides of the front seatbacks (side air bags) The front and rear window pillars, and the roof edge along both sides (curtain air bags)

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