Before performing troubleshooting for the dynamic radar cruise control system, perform troubleshooting for the pre-collision system.
*: Use the GTS.
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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 |
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Measure the battery voltage.
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.
Check the fuses and relays.
Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.
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Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: System Select / Health Check.
Check for DTCs.
Turn the ignition switch off.
| Result | Proceed to |
|---|---|
| System DTCs other than DTCs related to the dynamic radar cruise control system (Radar Cruise 1) and dynamic radar cruise control system (Radar Cruise 2) are not output | A |
| System DTCs other than DTCs related to the dynamic radar cruise control system (Radar Cruise 1) and dynamic radar cruise control system (Radar Cruise 2) are output | B |
A
B
Check if a warning message is displayed on the multi-information display in the combination meter assembly.
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 |
A
B
C
Using the GTS, check for CAN communication system DTCs.
| Result | Proceed to |
|---|---|
| CAN DTCs are not output | A |
| CAN DTCs are output | B |
A
B
Using the GTS, Check for DTCs.
| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
A
B
Using the GTS, Clear the DTCs.
Reproduce the vehicle conditions that were present when the DTCs that were noted were stored.
Refer to each corresponding DTC for details on the detection conditions.
Recheck for DTCs.
| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
A
B
Using the GTS, check for Vehicle Control History (RoB).
| Tester Display |
|---|
| Vehicle Control History (RoB) |
Make a note of the output Vehicle Control History (RoB).
| Result | Proceed to |
|---|---|
| Vehicle Control History (RoB) is not output | A |
| Vehicle Control History (RoB) X2006, X2013, X2015, X2022, X2026 or X2028 is output | B |
| Vehicle Control History (RoB) other than X2006, X2013, X2015, X2022, X2026 or X2028 is output | C |
A
B
C
Using the GTS, clear the Vehicle Control History (RoB).
| Tester Display |
|---|
| Vehicle Control History (RoB) |
Using the GTS, check for Vehicle Control History (RoB).
| Tester Display |
|---|
| Vehicle Control History (RoB) |
| Result | Proceed to |
|---|---|
| Vehicle Control History (RoB) is not output | A |
| Vehicle Control History (RoB) is output | B |
A
B
Refer to Problem Symptoms Table.
| Result | Proceed to |
|---|---|
| Fault is not listed in Problem Symptoms Table | A |
| Fault is listed in Problem Symptoms Table | B |
A
B
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.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Body Electrical / Front Radar Sensor / Utility / Front Beam Axis Misalignment Reading.
| Tester Display |
|---|
| Front Beam Axis Misalignment Reading |
Check the amount of misalignment.
| Vertical Direction | -5 to 5 deg. |
| Horizontal Direction | -0.6 to 0.6 deg. |
The millimeter wave radar sensor assembly automatically calibrates the beam axis while the vehicle is being driven. The specified values apply to the automatic calibration only and do not apply during manual beam axis calibration of the millimeter wave radar sensor assembly.
| Result | Proceed to |
|---|---|
| The beam axis values are within specification | A |
| The beam axis values are not within specification | B |
A
B