Before performing troubleshooting for the road sign assist system, make sure that the pre-collision system and lane control system are not malfunctioning.
Pre-collision system: Click hereVehicle Interior>PRE-COLLISION>PRE-COLLISION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING201902,202405,_58,_078886,_0382740,RM100000001G6X9,202405,999999,_58,_078886,_0382740,RM100000002NOVK,
Lane control system: Click hereEngine / Hybrid System>CRUISE CONTROL>LANE CONTROL SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING201902,999999,_51,_078884,_0383150,RM100000001G9IT,
Perform the following procedure to troubleshoot the road sign assist system.
*: Use the GTS.
| Proceed to |
|---|
| NEXT |
NEXT
Interview the customer and confirm the problem.
| Proceed to |
|---|
| NEXT |
NEXT
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.
| Proceed to |
|---|
| NEXT |
NEXT
Using the GTS, check if the CAN communication system is functioning normally.
CAN communication system is functioning normally.
Refer to CAN Bus Check in CAN Communication System.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Using the GTS, Check for DTCs.
Make a note of the output 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) is 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.
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 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