CAUTION / NOTICE / HINT
HINT:
PROCEDURE
1. | VEHICLE BROUGHT TO WORKSHOP |
|
2. | CUSTOMER PROBLEM ANALYSIS CHECK |
HINT:
What | Vehicle model, system name |
When | Date, time, occurrence frequency, whether the problem occurred recently or has been occurring for a long time |
Where | Whether the problem occurs at a specific location |
Under what conditions? | Whether the doors were locked or unlocked, whether the engine switch was on (IG), whether the engine has started |
How did it happen? | Problem symptoms |
|
3. | PRE-CHECK |
(a) Measure the battery voltage.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.
(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 COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check for CAN communication system DTCs.
Click here
Result | Proceed to |
---|---|
CAN DTCs are not output | A |
CAN DTCs are output | B |
B | ![]() | GO TO CAN COMMUNICATION SYSTEM |
|
5. | CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check for LIN communication system DTCs.
Click here
Result | Proceed to |
---|---|
LIN DTCs are not output | A |
LIN DTCs are output | B |
B | ![]() | GO TO LIN COMMUNICATION SYSTEM |
|
6. | CHECK FOR DTC (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)* |
(a) Clear the DTCs.
Click here
(b) Recheck for DTCs.
Body Electrical > Master Switch > Trouble Codes Result | Proceed to |
---|---|
DTC B2312 is not output | A |
DTC B2312 is output | B |
B | ![]() | GO TO POWER WINDOW CONTROL SYSTEM |
|
7. | CHECK FOR DTC (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))* |
(a) Clear the DTCs.
Click here
(b) Recheck for DTCs.
Body Electrical > Main Body > Trouble Codes Result | Proceed to |
---|---|
DTC B1243 is not output | A |
DTC B1243 is output | B |
B | ![]() | GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
8. | PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
Result | Proceed to |
---|---|
Fault is not listed in Problem Symptoms Table | A |
Fault is listed in Problem Symptoms Table | B |
B | ![]() | GO TO STEP 10 |
|
9. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Terminals of ECU
Click here
(b) Data List / Active Test
Click here
(c) Operation Check
Click here
(d) Inspection
|
10. | REPAIR OR REPLACE |
|
11. | CONFIRMATION TEST |
NEXT | ![]() | END |
Lexus RX (RX 350L, RX450h) 2016-2025 Owners Manual > Using the driving support
systems: LKA
(Lane-Keeping Assist)
Summary of functions
When driving on highways and freeways with white or yellow lines, this
function
alerts the driver when the vehicle might depart from its lane and provides
assistance
by operating the steering wheel to keep the vehicle in its lane. Furthermore,
the system also provides st ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Audio And Visual System (for 8 Inch Display): Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (CHECK USING TECHSTREAM) (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG) and wait for 90 seconds. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Navigation System / Trouble Codes. Body Electrical > Navigation Sys ...