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, 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 FOR DTC (WIRELESS DOOR LOCK CONTROL SYSTEM)* |
(a) Clear the DTCs.
Click here
(b) Recheck for DTCs.
Body Electrical > Smart Access > Trouble Codes Result | Proceed to |
---|---|
DTCs are not output | A |
DTCs are output | B |
B | ![]() | GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
6. | 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 8 |
|
7. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Terminals of ECU
Click here
(b) Data List / Active Test
Click here
(c) Operation Check
Click here
(d) Inspection
|
8. | REPAIR OR REPLACE |
|
9. | CONFIRMATION TEST |
NEXT | ![]() | END |
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Lighting System (w/ Automatic Headlight Beam Level Control System): Parking Light/Daytime Running Light Circuit
DESCRIPTION Parking light function:
When the main body ECU (multiplex network body ECU) receives the light control switch position signal, it sends an illumination request signal to the No. 1 headlight ECU sub-assembly and illuminates the parking lights.
Daytime running light function:
When ...
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Power Steering System: Lost Communication with ECM / PCM "A" (U0100,U0129,U023A)
DESCRIPTION The power steering ECU assembly receives signals from the ECM, skid control ECU (brake actuator assembly) and forward recognition camera (w/ forward recognition camera system) via CAN communication. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate ...