Lexus ES: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the wiper and washer system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
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| 2. | CUSTOMER PROBLEM ANALYSIS |
HINT:
- 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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| 3. | READ OUT AND SAVE OPERATION HISTORY |
NOTICE:
- If the vehicle or vehicle controls are operated (for example, during initial inspection when the vehicle is brought in for repair) before operation history has been read out and saved, the operation history information could be lost.
- The function "Read operation history" uses the current system time setting inside the Techstream and the time counter inside the controlling ECU to calculate the timings shown in the operation history. For this reason, before reading out the operation history, first make sure that the Techstream system clock is accurately set to the current time.
(a) Read out and save operation history using the Techstream.
Click here .gif)
| Tester Display |
|---|
| Operation History |
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| 4. | 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.
|
| 5. | 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 | .gif) | GO TO CAN COMMUNICATION SYSTEM |
|
| 6. | CHECK FOR DTC* |
(a) Check for DTCs.
Body Electrical > Wiper > Trouble Codes Body Electrical > Main Body > Trouble Codes Body Electrical > Rain and/or Humidity Sensor > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
| B | | GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
| 7. | 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 PROBLEM SYMPTOMS TABLE |
|
| 8. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Operation Check.
Click here
(b) Customize Parameters
Click here
(c) Terminals of ECU
Click here
(d) Fail-safe Chart
Click here
(e) Data List / Active Test
Click here
(f) Inspection
(g) On-vehicle inspection
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| 9. | ADJUST, REPAIR OR REPLACE |
|
| 10. | CONFIRMATION TEST |
| NEXT | | END |
READ NEXT:
Operation Check
OPERATION CHECK CHECK DOOR OPEN LINKED WIPER SUSPEND FUNCTION (w/ Auto Wiper System) (a) Continuously apply water to the windshield glass in front of the rain sensor. (b) Turn the engine switch on (IG
Customize Parameters
CUSTOMIZE PARAMETERS NOTICE:
When the customer requests a change in a function, first make sure that the function can be customized.
Be sure to make a note of the current settings before customiz
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: Before replacing the main body ECU (multiplex network body ECU), refer to Registration. Click here HINT:
Use the table below to help determine the cause of proble
SEE MORE:
Hybrid Vehicle Control ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Hybrid Vehicle Control ECU Communication Stop Mode Any of the following conditions are met:
Communication stop for "Hybrid Vehicle Control" is indicated on the "Communication Bus Check" screen of the Techstream.
Click here
Communica
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
*: Use the Techstream
Use the following procedure to troubleshoot the motor generator control system.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS
NEXT 3. CONNECT TECHSTREAM
