Lexus ES manuals

Lexus ES: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use the following procedure to troubleshoot the power steering system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

INSPECT BATTERY

(a) Turn the engine switch off.

(b) Measure the voltage of the battery.

Standard Voltage:

11 to 14 V

HINT:

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

NEXT

3.

CHECK DTC AND FREEZE FRAME DATA*

HINT:

Refer to DTC Check / Clear.

Chassis > EMPS > Trouble Codes
NEXT

4.

PROBLEM SYMPTOM CONFIRMATION

Result

Proceed to

Symptom does not occur.

A

Symptom occurs.

B

B

GO TO STEP 6

A

5.

SYMPTOM SIMULATION

NEXT

6.

CHECK CAN COMMUNICATION SYSTEM*

(a) Check for DTCs.

Click here

Result

Proceed to

CAN communication system DTCs are not output.

A

CAN communication system DTCs are output.

B

HINT:

  • If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.
  • If communication to the rack and pinion power steering gear assembly cannot be established through the Techstream, inspect terminals CANH and CANL of the DLC3 and the rack and pinion power steering gear assembly, and the IG circuit of the rack and pinion power steering gear assembly.
B

PROCEED TO CAN COMMUNICATION SYSTEM

A

7.

CHECK FOR DTC*

(a) Check for DTCs.

Chassis > EMPS > Trouble Codes

HINT:

Refer to Diagnostic Trouble Code Chart when any DTCs are output.

Click here

Result

Proceed to

DTCs are not output.

A

DTCs are output.

B

B

GO TO STEP 10

A

8.

PROBLEM SYMPTOMS TABLE

(a) 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

GO TO STEP 10

A

9.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Refer to Terminals of ECU.

Click here

(b) Refer to Data List / Active Test.

Click here

NEXT

10.

REPAIR OR REPLACE

NEXT

11.

CONFIRMATION TEST

NEXT

END

READ NEXT:

 Calibration

CALIBRATION TORQUE SENSOR ZERO POINT CALIBRATION (USING TECHSTREAM) NOTICE: Perform torque sensor zero point calibration if any of the following conditions occur: The rack and pinion power steering

 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

 Terminals Of Ecu

TERMINALS OF ECU TERMINALS OF ECU *a Component without harness connected (Rack and Pinion Power Steering Gear Assembly) - - HINT: The rack and pinion power steering gear assembly uses

SEE MORE:

 Switch Operation of Remote Touch not Accepted

CAUTION / NOTICE / HINT NOTICE: Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System. Click here When replacing the radio receiver assembly, alw

 On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT PCV VALVE (VENTILATION VALVE SUB-ASSEMBLY) CAUTION: To prevent injury due to contact with an operating cooling fan, keep your hands and clothing away from the cooling fans when working in the engine compartment with the engine running or the power switch on

© 2016-2025 Copyright www.lexguide.net