Toyota Yaris: Lane Tracing Assist System / How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the lane tracing assist system.
- *: 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 if the CAN communication system is functioning normally.
Click here
HINT:
Refer to CAN Bus Check in CAN Communication System.
OK:
CAN communication system is functioning normally.
| NG |
 | GO TO CAN COMMUNICATION SYSTEM |
|
| 5. | CHECK FOR DTCs* |
(a) Using the GTS, Check for DTCs.
Chassis > Lane Control > Trouble Codes(b) Make a note of the output DTCs.
| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
| B |
 | GO TO STEP 8 |
|
| 6. | CHECK VEHICLE CONTROL HISTORY* |
(a) Using the GTS, check for vehicle control history (RoB).
Chassis > Lane Control > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
(b) 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) is output | B |
| A |
 | GO TO SYMPTOM SIMULATION |
|
| 7. | RECONFIRM VEHICLE CONTROL HISTORY* |
(a) Using the GTS, clear the vehicle control history (RoB).
Chassis > Lane Control > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
(b) Using the GTS, check for vehicle control history (RoB).
Chassis > Lane Control > Utility| 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 |
 | GO TO SYMPTOM SIMULATION |
| B |
 | GO TO VEHICLE CONTROL HISTORY |
| 8. | RECONFIRM DTC OUTPUT* |
(a) Using the GTS, Clear the DTCs.
Chassis > Lane Control > 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) Using the GTS, check 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 STEP 6 |
| B |
 | GO TO DTC CHART |
System Diagram
S..
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Break-In Period
No special break-in is necessary, but a few precautions in the first 600 miles (1,000 km) may add to the performance, economy, and life of the vehicle.
Do not race the engine. Do not maintain one constant speed, either slow or fast, for a long period of time. Do not drive constantly at full-throttle or high engine rpm for extended periods of time. Avoid unnecessary hard stops. Avoid full-throttle starts.