Lexus ES: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
*: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
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| 2. | CUSTOMER PROBLEM ANALYSIS |
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| 3. | CONNECT TECHSTREAM TO DLC3* |
HINT:
If the display indicates a communication malfunction, inspect the DLC3.
When any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.
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| 4. | CHECK DTC AND FREEZE FRAME DATA* |
(a) Check for DTCs.
Powertrain > Engine > Trouble Codes(b) Check for freeze frame data.
Click here .gif)
HINT:
Record or print DTCs and freeze frame data if necessary.
|
| 5. | CLEAR DTC AND FREEZE FRAME DATA* |
(a) Clear the DTCs and freeze frame data.
Powertrain > Engine > Clear DTCs
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| 6. | CONDUCT VISUAL INSPECTION |
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| 7. | SELECT CHECK MODE DIAGNOSIS* |
(a) Switch the ECM from normal mode to check mode.
Powertrain > Engine > Utility| Tester Display |
|---|
| Check Mode |
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| 8. | CONFIRM PROBLEM SYMPTOMS |
(a) Confirm problem symptoms.
HINT:
If the engine does not start, first perform the "Check DTC" procedure and "Conduct Basic Inspection" procedure below.
| Result | Proceed to |
|---|---|
| Malfunction does not occur | A |
| Malfunction occurs | B |
| B | .gif) | GO TO STEP 10 |
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| 9. | SIMULATE SYMPTOMS |
HINT:
Refer to Symptom Simulation.
Click here
|
| 10. | CHECK DTC* |
(a) Check for DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are output | A |
| DTCs are not output | B |
| B | | GO TO STEP 12 |
|
| 11. | REFER TO DTC CHART |
HINT:
Refer to Diagnostic Trouble Code Chart.
Click here
|
| 12. | CONDUCT BASIC INSPECTION |
(a) Conduct basic inspection.
Click here
| Result | Proceed to |
|---|---|
| Malfunctioning parts not confirmed | A |
| Malfunctioning parts confirmed | B |
| B | | GO TO STEP 17 |
|
| 13. | REFER TO PROBLEM SYMPTOMS TABLE |
HINT:
Refer to Problem Symptoms Table.
Click here
| Result | Proceed to |
|---|---|
| Malfunctioning circuit confirmed | A |
| Malfunctioning parts confirmed | B |
| B | | GO TO STEP 17 |
|
| 14. | CHECK ECM POWER SOURCE CIRCUIT |
(a) Check the ECM power source circuit.
Click here
|
| 15. | CONDUCT CIRCUIT INSPECTION |
| Result | Proceed to |
|---|---|
| Malfunction not confirmed | A |
| Malfunction confirmed | B |
| B | | GO TO STEP 18 |
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| 16. | CHECK FOR INTERMITTENT PROBLEMS |
(a) Check for intermittent problems.
Click here
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| 17. | CONDUCT PARTS INSPECTION |
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| 18. | IDENTIFY PROBLEM |
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| 19. | ADJUST AND/OR REPAIR |
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| 20. | CONDUCT CONFIRMATION TEST |
| NEXT | | END |
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If CAN communication system and lane control system DTCs are not output and any of the following problem symptoms exist, perform troubleshooting by checking the appropriate suspected areas in the order they are listed.
Use the table below to help determine the cause
