Toyota Yaris: Dynamic Radar Cruise Control System / How To Proceed With Troubleshooting

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / Cruise Control / Dynamic Radar Cruise Control System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Before performing troubleshooting for the dynamic radar cruise control 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 FOR DTCs (HEALTH CHECK)*

(a) Using the GTS, perform a health check.

Result

Proceed to

System DTCs other than DTCs related to the dynamic radar cruise control system (Radar Cruise1) and dynamic radar cruise control system (Radar Cruise2) are not output.

A

System DTCs other than DTCs related to the dynamic radar cruise control system (Radar Cruise1) and dynamic radar cruise control system (Radar Cruise2) are output.

B

B

GO TO DTC CHART

A

5.

CHECK MULTI-INFORMATION DISPLAY

(a) Check if a warning message is displayed on the multi-information display in the combination meter assembly.

HINT:

If more than one message is displayed, perform each inspection in the order of A, B and C.

Result

Proceed to

"Cruise Control Malfunction Visit Your Dealer" is displayed.

A

One of the following warning messages is displayed:

  • "Radar Cruise Control Unavailable See Owner's Manual"
  • "Radar Cruise Control Unavailable"

B

No dynamic radar cruise control system warnings are displayed.

C

B

GO TO STEP 8

C

GO TO STEP 11

A

6.

CHECK CAN COMMUNICATION SYSTEM*

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

Click here

CAN Bus Check

OK:

CAN communication system is functioning normally.

NG

GO TO CAN COMMUNICATION SYSTEM

OK

7.

CHECK FOR DTCs*

(a) Check for DTCs.

Powertrain > Radar Cruise1 > Trouble Codes Powertrain > Radar Cruise2 > 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 STEP 9

A

8.

CHECK VEHICLE CONTROL HISTORY*

(a) Using the GTS, check for vehicle control history.

Powertrain > Radar Cruise2 > Utility

Tester Display

Vehicle Control History (RoB)

(b) Record any vehicle control history that is output.

Result

Proceed to

Vehicle control history is not output

A

Vehicle control history X2013, X2015, X2022, X2026 or X2028 is output

B

Vehicle control history other than X2013, X2015, X2022, X2026 or X2028 is output

C

A

GO TO SYMPTOM SIMULATION

B

GO TO VEHICLE CONTROL HISTORY

C

GO TO STEP 10

9.

RECONFIRM DTCs*

(a) Clear the DTCs.

Powertrain > Radar Cruise1 > Clear DTCs Powertrain > Radar Cruise2 > Clear DTCs

(b) Reproduce the vehicle conditions that were present when the DTCs that were noted were stored.

HINT:

Refer to each corresponding DTC for details on the detection conditions.

Click here

(c) Recheck for DTCs.

(1) Attempt to duplicate the malfunction and check if the DTCs are output again.

Click here

Powertrain > Radar Cruise1 > Trouble Codes Powertrain > Radar Cruise2 > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B

A

GO TO SYMPTOM SIMULATION

B

GO TO DTC CHART

10.

RECONFIRM VEHICLE CONTROL HISTORY*

(a) Using the GTS, clear the vehicle control history.

Powertrain > Radar Cruise2 > Utility

Tester Display

Vehicle Control History (RoB)

(b) Recheck for vehicle control history.

Powertrain > Radar Cruise2 > Utility

Tester Display

Vehicle Control History (RoB)

Result

Proceed to

Vehicle control history is not output

A

Vehicle control history is output

B

A

GO TO SYMPTOM SIMULATION

B

GO TO VEHICLE CONTROL HISTORY

11.

PROBLEM SYMPTOMS TABLE

HINT:

Refer to Problem Symptoms Table.

Click here

Result

Proceed to

Fault is not listed in Problem Symptoms Table

A

Fault is listed in Problem Symptoms Table

B

B

GO TO PROBLEM SYMPTOMS TABLE

A

12.

INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY (BEAM AXIS MISALIGNMENT READING)*

NOTICE:

Before checking for millimeter wave radar sensor beam axis misalignment, make sure that the radiator grille and front bumper are correctly installed and have not been damaged or modified.

(a) Adjust the reflector height.

Triangle Target: Click here

Flat Surface Target: Click here

(b) Place the reflector.

Triangle Target: Click here

Flat Surface Target: Click here

(c) Using the GTS, check the amount of misalignment.

Body Electrical > Front Radar Sensor > Utility

Tester Display

Front Beam Axis Misalignment Reading

(d) Check the amount of misalignment.

Standard:

Vertical Direction

-5 to 5 deg.

Horizontal Direction

-0.6 to 0.6 deg.

Result

Proceed to

The beam axis values are within specification

A

The beam axis values are not within specification

B

A

GO TO SYMPTOM SIMULATION

B

ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY

    System Diagram

    S..

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