Lexus ES: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- *: Use the Techstream
- Use the following procedure to troubleshoot the hybrid battery system.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
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| 2. | CUSTOMER PROBLEM ANALYSIS |
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| 3. | CONNECT TECHSTREAM TO THE DLC3* |
HINT:
If the display on the tester indicates a communication error, inspect the DLC3.
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| 4. | CHECK DTC AND FREEZE FRAME DATA* |
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HINT:
- Make sure to save freeze frame data because the data is necessary for performing simulation tests.
- For the hybrid control system, there are many DTCs, many of which can be stored due to a single malfunction. As a result, in some of the diagnosis procedures an instruction is provided to check for other DTCs and their corresponding INF codes. By following the diagnosis path based on the combination of output DTCs and INF codes, it is possible to narrow down the problem early and avoid unnecessary diagnosis.
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| 5. | CLEAR DTC AND FREEZE FRAME DATA* |
Click here
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| 6. | CONDUCT VISUAL INSPECTION |
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| 7. | CONFIRM PROBLEM SYMPTOMS |
HINT:
If the engine does not start, perform steps 9 and 11 first.
| Malfunction occurs. | .gif) | GO TO STEP 10 |
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| 8. | DUPLICATE CONDITIONS THAT PRODUCE SYMPTOMS |
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| 9. | CHECK FOR DTCS* |
Click here
| DTCs are not output. | | GO TO STEP 16 |
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| 10. | REFER TO DTC CHART |
HINT:
DTCs for the hybrid control system and hybrid battery system are displayed using the same menus on the Techstream. It is necessary to check the DTC charts for hybrid control system and hybrid battery system.
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Hybrid Control System - DTC chart
Click here
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Hybrid Battery System - DTC chart
Click here
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| 11. | CONDUCT CIRCUIT INSPECTION |
| Malfunction confirmed. | | GO TO STEP 13 |
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| 12. | CHECK FOR INTERMITTENT PROBLEMS |
Click here
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| 13. | IDENTIFY PROBLEM |
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| 14. | ADJUST AND/OR REPAIR |
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| 15. | CONDUCT CONFIRMATION TEST |
| NEXT | | END |
| 16. | CONDUCT BASIC INSPECTION |
| Malfunctioning parts confirmed. | | GO TO STEP 18 |
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| 17. | CHECK ECU POWER SOURCE CIRCUIT |
| NEXT | | GO TO STEP 11 |
| 18. | CONDUCT PARTS INSPECTION |
| NEXT | | GO TO STEP 13 |
READ NEXT:
Check For Intermittent Problems
CHECK FOR INTERMITTENT PROBLEMS CHECK FOR INTERMITTENT PROBLEMS (a) Perform a simulation test. (1) For the simulation test, reproduce the driving conditions that were present when the problem occurred
Utility
UTILITY NOTICE:
If the HV battery or an HV supply stack sub-assembly has been replaced, make sure to perform the following utilities in the following order: "Battery Status Info Update", "Prediagno
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE Hybrid Battery System Symptom Suspected Area Link "Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" is displayed on the multi-information d
SEE MORE:
Disassembly
DISASSEMBLY CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. REMOVE HEADLIGHT ECU SUB-ASSEMBLY Click here 2. REMOVE HEADLIGHT GASKET Click here 3. REMOVE HEADLIGHT RIM (a) Remove the screw.
ECM Communication Circuit (C1203)
DESCRIPTION DTC No. Detection Item INF Code DTC Detection Condition Trouble Area MIL Note C1203 ECM Communication Circuit 1161 Either of the following is detected:
Identification information sent from other ECUs does not match with the value stored when shipped from the f
