Toyota Yaris: 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 |
|
| 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
|
| 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.
|
| 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 |
|
| 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:
| B |
| No dynamic radar cruise control system warnings are displayed. | C |
| B |
 | GO TO STEP 8 |
| C |
 | GO TO STEP 11 |
|
| 6. | 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 |
|
| 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 |
|
| 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
| 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 |
|
| 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..
Road Test
ROAD TEST HINT:
The dynamic radar cruise control system has 2 cruise control modes: constant speed control mode and vehicle-to-vehicle distance control mode...
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Key Suspend Function
If a key is left in the vehicle, the functions of the key left in the vehicle are temporarily suspended to prevent theft of the vehicle.
To restore the functions, press the unlock button on the functions-suspended key in the vehicle.
