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

CAUTION / NOTICE / HINT

HINT:

  • The ECM is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there are no malfunctions in the CAN communication system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

NEXT

3.

INSPECT BATTERY VOLTAGE

Standard Voltage:

11 to 14 V

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

NEXT

4.

CONNECT TECHSTREAM TO DLC3*

NEXT

5.

CHECK AND CLEAR DTCS AND FREEZE FRAME DATA*

(a) Refer to DTC Check / Clear.

Click here

NEXT

6.

VISUAL INSPECTION

NEXT

7.

SELECT CHECK MODE DIAGNOSIS*

(a) Refer to Check Mode Procedure.

Click here

NEXT

8.

PROBLEM SYMPTOM CONFIRMATION

(a) Refer to Road Test.

Click here

Result

Proceed to

Symptom does not occur

A

Symptom occurs

B

B

GO TO STEP 10

A

9.

SYMPTOM SIMULATION

(a) Refer to Symptom Simulation.

Click here

NEXT

10.

DTC CHECK*

(a) Refer to DTC Check / Clear.

Click here

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO STEP 20

A

11.

BASIC INSPECTION

(a) Refer to Park/Neutral Position Switch.

Click here

(b) Refer to Transmission Control Cable.

Click here

NG

GO TO STEP 18

OK

12.

MECHANICAL SYSTEM TESTS

(a) Refer to Mechanical System Tests.

Click here

NG

GO TO STEP 17

OK

13.

HYDRAULIC TEST

(a) Refer to Hydraulic Test.

Click here

NG

GO TO STEP 17

OK

14.

MANUAL SHIFTING TEST

(a) Refer to Manual Shifting Test.

Click here

NG

GO TO STEP 16

OK

15.

PROBLEM SYMPTOMS TABLE CHAPTER 1

(a) Refer to Problem Symptoms Table.

Click here

NG

GO TO STEP 21

OK

16.

PROBLEM SYMPTOMS TABLE CHAPTER 2

(a) Refer to Problem Symptoms Table.

Click here

NEXT

17.

COMPONENT INSPECTION

NEXT

18.

REPAIR OR REPLACE

NEXT

19.

CONFIRMATION TEST

NEXT

END

20.

DTC CHART

(a) Refer to Diagnostic Trouble Code Chart.

Click here

NEXT

21.

CIRCUIT INSPECTION

NEXT

22.

IDENTIFICATION INFORMATION

NEXT

GO TO STEP 18

    System Diagram
    SYSTEM DIAGRAM ...

    Road Test
    ROAD TEST PROBLEM SYMPTOM CONFIRMATION (a) Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that the transaxle does not shift up, shift down, or t ...

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