Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use the following procedure listed to troubleshoot the Dynamic Torque Control AWD system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

INSPECT BATTERY VOLTAGE

Standard Voltage:

11 to 14 V

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

NEXT

3.

CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Click here

Result

Proceed to

CAN DTC is not output

A

CAN DTC is output

B

B

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

A

4.

CHECK DTC AND FREEZE FRAME DATA*

(a) Check for DTCs.

Click here

Chassis > Four Wheel Drive > Trouble Codes

(b) Check for freeze frame data.

HINT:

Write down or print DTCs and freeze frame data if necessary.

(c) Clear the DTCs and freeze frame data.

Click here

Chassis > Four Wheel Drive > Clear DTCs

(d) Recheck for DTCs.

Click here

Chassis > Four Wheel Drive > Trouble Codes

Result

Proceed to

DTC does not reoccur

A

DTC does reoccur

B

B

GO TO STEP 7

A

5.

PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result

Proceed to

Fault not listed in problem symptoms table

A

Fault listed in problem symptoms table

B

B

GO TO STEP 7

A

6.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU.

Click here

(b) Data List / Active Test.

Click here

NEXT

7.

REPAIR OR REPLACE

NEXT

8.

CONFIRM TEST

NEXT

END

    Calibration
    CALIBRATION DESCRIPTION (a) When the 4WD ECU assembly is replaced with a known good one from another vehicle or the acceleration sensor (airbag ECU assembly*1 or yaw rate sensor assembly*2) is replace ...

    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 ...

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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