Lexus ES: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
*: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
| 2. | CUSTOMER PROBLEM ANALYSIS |
(a) Interview the customer and confirm the problem.
Click here .gif)
|
| 3. | CHECK DTC AND FREEZE FRAME DATA* |
(a) Check and record DTCs and Freeze Frame Data.
for DTC Check / Clear: Click here
for Freeze Frame Data: Click here
(b) Clear the DTCs and Freeze Frame Data.
for DTC Check / Clear: Click here
for Freeze Frame Data: Click here
(c) Reconfirm the DTCs.
(1) Reconfirm the DTCs based on the recorded DTCs and Freeze Frame Data.
for DTC Check / Clear: Click here
for Freeze Frame Data: Click here
HINT:
-
When CAN communication system DTCs are output, repair the CAN communication system first.
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If DTC U010087, U012587 and/or U012687 are among the CAN communication DTCs that are output, first use the Data List to check for a momentary open circuit.
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If the Techstream cannot communicate with the skid control ECU (brake actuator assembly), inspect the CAN communication system.
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If there is no response from the skid control ECU (brake actuator assembly), inspect the IG1 circuit and +BS circuit of the skid control ECU (brake actuator assembly).
Click here
| Result | Proceed to |
|---|---|
| DTCs are not output. (Problem symptom occurs.) | A |
| DTCs are output. | B |
| DTCs are not output. (Problem symptom does not occur.) | C |
| B |  | GO TO STEP 10 |
| C | | USE SIMULATION METHOD TO CHECK |
|
| 4. | PROBLEM SYMPTOMS TABLE |
(a) Check if the problem symptoms are listed in the problem symptoms table.
Click here
| Result | Proceed to |
|---|---|
| The problem symptoms are not listed in the problem symptoms table. | A |
| The problem symptoms are listed in the problem symptoms table. | B |
| B | | GO TO STEP 9 |
|
| 5. | PERFORM TROUBLESHOOTING BASED ON PROBLEM SYMPTOM* |
(a) DATA LIST / ACTIVE TEST
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(b) ON-VEHICLE INSPECTION
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(c) TERMINALS OF ECU
Click here
|
| 6. | REPAIR OR REPLACEMENT |
CAUTION:
Refer to the precautions before performing adjustment, repair or replacement.
Click here
|
| 7. | RECONFIRM DTC* |
(a) Clear the DTCs.
Click here
(b) Turn the engine switch off.
(c) Turn the engine switch on (IG).
(d) Check if the same DTCs are output.
Click here
| Result | Proceed to |
|---|---|
| DTCs are not output. | A |
| DTCs are output. | B |
| B | | REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
|
| 8. | CONFIRMATION TEST* |
| NEXT | | END |
| 9. | REPAIR PERFORM TROUBLESHOOTING BASED ON PROBLEM SYMPTOM* |
(a) Confirm the problem symptoms table and perform troubleshooting.
Click here
| NEXT | | GO TO STEP 7 |
| 10. | REPAIR CIRCUIT INDICATED BY OUTPUT DTC* |
(a) Confirm the diagnostic trouble code chart and perform troubleshooting.
Click here
| NEXT | | GO TO STEP 7 |
READ NEXT:
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Brake Switch "A" Circuit Short to Ground (P057111)
DESCRIPTION The skid control ECU (brake actuator assembly) receives stop light switch assembly signals and uses them to determine whether or not the brakes are applied. When the brake pedal is depress
Brake Switch "A" Circuit Short to Ground (P057111)
DESCRIPTION The skid control ECU (brake actuator assembly) receives stop light switch assembly signals and uses them to determine whether or not the brakes are applied. When the brake pedal is depress
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