CAUTION / NOTICE / HINT
HINT:
Click here
Click here
PROCEDURE
1. | VEHICLE BROUGHT TO WORKSHOP |
|
2. | CUSTOMER PROBLEM ANALYSIS |
HINT:
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 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* |
(a) Using the Techstream, Check for DTCs.
Chassis > Front Recognition Camera > Trouble Codes Result | Proceed to |
---|---|
DTCs are not output | A |
DTC C1AA800 is output | B |
DTC other than C1AA800 is output | C |
A | ![]() | GO TO STEP 7 |
B | ![]() | GO TO DTC CHART (C1AA8000) |
|
6. | RECONFIRM DTC OUTPUT* |
(a) Using the Techstream, Clear the DTCs.
Chassis > Front Recognition Camera > 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 Techstream, check for DTCs.
Chassis > Front Recognition Camera > Trouble Codes Result | Proceed to |
---|---|
DTCs are not output | A |
DTCs are output | B |
B | ![]() | GO TO DTC CHART |
|
7. | CHECK VEHICLE CONTROL HISTORY* |
(a) Using the Techstream, check for Vehicle Control History (RoB).
Chassis > Front Recognition Camera > 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) other than X2015 and X201C is output | |
Vehicle Control History (RoB) X2015 or X201C is output | B |
B | ![]() | GO TO VEHICLE CONTROL HISTORY (X2015 or X201C) |
|
8. | RECONFIRM VEHICLE CONTROL HISTORY* |
(a) Using the Techstream, clear the Vehicle Control History (RoB).
Chassis > Front Recognition Camera > Utility Tester Display |
---|
Vehicle Control History (RoB) |
(b) Using the Techstream, check for Vehicle Control History (RoB).
Chassis > Front Recognition Camera > 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 |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Air Conditioning System: Lost Communication with Rear Panel LIN (B14B3)
DESCRIPTION The No. 2 air conditioning control assembly communicates with the air conditioning amplifier assembly via LIN communication. If the LIN communication system is malfunctioning, the air conditioning amplifier assembly does not operate even if the No. 2 air conditioning control assembly is ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Windshield Deicer System: System Diagram
SYSTEM DIAGRAM Sender Receiver Signal Communication Method Radio Receiver Assembly Air Conditioning Amplifier Assembly Front wiper deicer switch signal CAN ...