Lexus ES manuals

Lexus ES: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

*: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

(a) Interview the customer and confirm the problem.

Click here

NEXT

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

Chassis > Brake/EPB > Trouble Codes

(b) Clear the DTCs and Freeze Frame Data.

for DTC Check / Clear: Click here

for Freeze Frame Data: Click here

Chassis > Brake/EPB > Clear DTCs

(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

Chassis > Brake/EPB > Trouble Codes

HINT:

  • When CAN communication system DTCs are output, repair the CAN communication system first.

    Click here

  • 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.

    Click here

  • If the Techstream cannot communicate with the skid control ECU (brake actuator assembly), inspect the CAN communication system.

    Click here

  • 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

A

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

A

5.

PERFORM TROUBLESHOOTING BASED ON PROBLEM SYMPTOM*

(a) DATA LIST / ACTIVE TEST

Click here

(b) ON-VEHICLE INSPECTION

Click here

(c) TERMINALS OF ECU

Click here

NEXT

6.

REPAIR OR REPLACEMENT

CAUTION:

Refer to the precautions before performing adjustment, repair or replacement.

Click here

NEXT

7.

RECONFIRM DTC*

(a) Clear the DTCs.

Click here

Chassis > Brake/EPB > Clear DTCs

(b) Turn the engine switch off.

(c) Turn the engine switch on (IG).

(d) Check if the same DTCs are output.

Click here

Chassis > Brake/EPB > Trouble Codes

Result

Proceed to

DTCs are not output.

A

DTCs are output.

B

B

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

A

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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 System Diagram

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