Lexus ES manuals

Lexus ES: How To Proceed With Troubleshooting

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK

NEXT

3.

INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

HINT:

If the battery voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

NEXT

4.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if the CAN communication system is functioning normally.

Click here

Result

Proceed to

CAN communication system DTCs are not output.

A

CAN communication system DTCs are output.

B

B

GO TO CAN COMMUNICATION SYSTEM

A

5.

CHECK FOR DTC

(a) Check for DTCs and note any codes that are output.

Body Electrical > Active Noise Control > Trouble Codes

(b) Clear the DTCs.

Body Electrical > Active Noise Control > Clear DTCs

(c) Recheck for DTCs. Try to reproduce the active noise control system DTCs by duplicating the conditions indicated by the DTCs.

Body Electrical > Active Noise Control > Trouble Codes

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 DIAGNOSTIC TROUBLE CODE CHART

C

USE SIMULATION METHOD TO CHECK

A

6.

PROBLEM SYMPTOMS TABLE

HINT:

Refer to Problem Symptoms Table.

Click here

Result

Proceed to

Fault is not listed in Problem Symptoms Table.

A

Fault is listed in Problem Symptoms Table.

B

B

PERFORM TROUBLESHOOTING BASED ON PROBLEM SYMPTOM

A

7.

OVERALL ANALYSIS AND TROUBLESHOOTING

(a) Terminals of ECU

Click here

(b) Data List / Active Test

Click here

NEXT

8.

ADJUST, REPAIR OR REPLACE

NEXT

9.

CONFIRMATION TEST

NEXT

END

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 Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspect

 Adjustment

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