Lexus ES: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use these procedures to troubleshoot the grille shutter 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
|
| 3. | PRE-CHECK |
(a) Measure the auxiliary battery voltage with the power switch off.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary 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. | INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check for CAN communication system DTCs.
Click here .gif)
| Result | Proceed to |
|---|---|
| CAN DTCs are not output | A |
| CAN DTCs are output | B |
| B | .gif) | GO TO CAN COMMUNICATION SYSTEM |
|
| 5. | CHECK FOR DTC* (SFI SYSTEM) |
(a) Check for DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
| B | | GO TO SFI SYSTEM |
|
| 6. | CHECK FOR DTC* (GRILLE SHUTTER SYSTEM) |
(a) Check for DTCs.
Body Electrical > Grille Shutter > 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 STEP 9 |
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| 8. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Terminals of ECU
Click here
(b) Data List / Active Test
Click here
|
| 9. | REPAIR OR REPLACE |
|
| 10. | CHECK FOR DTC* (GRILLE SHUTTER SYSTEM) |
(a) Check for DTCs.
Body Electrical > Grille Shutter > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
| A | | END |
| B | | GO TO DIAGNOSTIC TROUBLE CODE CHART |
READ NEXT:
Initialization
INITIALIZATION CHANGE GRILLE SHUTTER CONTROL MODE AND/OR PERFORM INITIALIZATION (a) In the following situations, it is necessary to change the grille shutter control mode and/or initialize the grille
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE:
Before performing troubleshooting, change the grille shutter control mode to maintenance mode.
Click here
If the swing grille actuator assembly has been replaced
Terminals Of Ecu
TERMINALS OF ECU CHECK SWING GRILLE ACTUATOR ASSEMBLY (a) Disconnect the z23 swing grille actuator assembly connector. (b) Measure the voltage and resistance according to the value(s) in the table be
SEE MORE:
ECU Power Source Circuit
DESCRIPTION This circuit is the power source circuit to operate the parking assist ECU. The parking assist ECU controls the panoramic view monitor system. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuse for circuits related to this system before performing the following inspection p
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Before performing troubleshooting for the dynamic radar cruise control system, perform troubleshooting for the pre-collision system.
Click here
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. PRE-CHECK
