Before performing troubleshooting for the front radar sensor system, perform troubleshooting for the pre-collision system.
*: Use the GTS.
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| NEXT |
NEXT
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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NEXT
Measure the auxiliary battery voltage with the ignition switch off.
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary 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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NEXT
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
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Using the GTS, check for DTCs.
| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTC C1A1100 is output | B |
| DTCs other than C1A1100 are output | C |
A
B
C
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.
Using the GTS, check 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) codes are not output | A |
| Vehicle Control History (RoB) code X2026 or X2028 is output | B |
| Vehicle Control History (RoB) codes other than X2026 and X2028 are 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) codes are not output | A |
| Vehicle Control History (RoB) codes are output | B |
A
B