Toyota Yaris: 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 |
|
| 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 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 |
|
| 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 |
|
| 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) |
|
| 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...
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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)