Lexus ES: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the tire pressure warning system.
- Make sure that the wireless door lock control system has exited diagnostic mode before performing the following procedure.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
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| 2. | CUSTOMER PROBLEM ANALYSIS |
(a) Interview the customer to confirm the problem.
HINT:
It is important to collect as much specific information as possible from the customer to allow for a quick repair.
|
| 3. | ADJUST TIRE PRESSURE* |
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
(f) Set all tire pressures to the specified value.
NOTICE:
Refer to the link as the procedure for adjusting the tire pressures differs depending on the temperature of the tires.
Click here .gif)
(g) Display "ID Tire Inflation Pressure" in the Data List and check that the tire pressure values match the adjusted pressure amount.
HINT:
It may take a few minutes until the values are displayed.
(h) Perform initialization.
Click here
HINT:
The tire pressure warning system illuminates the tire pressure warning light to warn the driver when any of the following condition is met:
- The tire pressure drops to approximately 75% or less of the tire pressure set when system initialization was performed using the steering pad switch assembly.
| Result | Proceed to |
|---|---|
| Tire pressure warning light remains on | A |
| Tire pressure warning light goes off | B |
| B | .gif) | GO TO STEP 11 |
|
| 4. | CHECK ECU CONNECTED TO CAN BUS* |
(a) Check the ECUs connected to the CAN bus.
Click here
| Result | Proceed to |
|---|---|
| No malfunction appears | A |
| Malfunction appears | B |
| B | | GO TO CAN COMMUNICATION SYSTEM |
|
| 5. | CHECK FOR DTC (CAN COMMUNICATION SYSTEM)* |
(a) Check for DTCs.
Click here
| Result | Proceed to |
|---|---|
| CAN system DTCs are not output | A |
| CAN system DTCs are output | B |
| B | | GO TO CAN COMMUNICATION SYSTEM |
|
| 6. | CHECK FOR DTC* |
(a) Check for DTCs.
Click here
| Result | Proceed to |
|---|---|
| DTCs are output | A |
| DTCs are not output | B |
| B | | GO TO STEP 8 |
|
| 7. | DTC CHART |
(a) Refer to Diagnostic Trouble Code Chart.
Click here
| NEXT | | GO TO STEP 10 |
| 8. | PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
|
| 9. | CIRCUIT INSPECTION* |
(a) Refer to Electronic Circuit Inspection Procedure.
Click here
|
| 10. | REPAIR OR REPLACE |
(a) Repair or replace parts based on the diagnosis result.
|
| 11. | CONFIRMATION TEST* |
(a) Check the Data List to confirm that the tire inflation pressure has been received.
Click here
(b) Perform initialization.
Click here
(c) Confirm that the initialization has been completed.
| NEXT | | END |
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OPERATION CHECK CHECK TIRE PRESSURE WARNING SYSTEM FUNCTION (a) Using the Data List, check that the current tire pressure is normal. Click here (1) Slowly reduce the tire pressure of the front or re
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INITIALIZATION NOTICE:
Initialization can be confirmed through the tire pressure warning light.
If the engine switch is turned off during initialization, the tire pressure warning ECU and receive
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