Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

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2.	CUSTOMER PROBLEM ANALYSIS

HINT:

If there are any scratches or impact marks on the rear bumper, perform the blind spot monitor beam axis confirmation. If any abnormalities are found, perform the blind spot monitor sensor installation condition inspection.

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3.	INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

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

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4.	CHECK CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to 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 AND FREEZE FRAME DATA*

(a) Refer to DTC Check / Clear for the blind spot monitor system.

Click here

Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes

(b) Record or print DTCs and freeze frame data, if necessary.

Click here

Result	Proceed to
DTCs are not output.	A
DTCs are output.	B

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

6.	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

HINT:

If the symptom does not recur and no DTCs are output, attempt to reproduce the symptoms.

Click here

B

GO TO PROBLEM SYMPTOMS TABLE

A

7.	PERFORM TROUBLESHOOTING BASED ON MALFUNCTION SYMPTOM*

(a) Refer to Terminals of ECU.

Click here

(b) Refer to Diagnosis System.

Click here

(c) Refer to Data List / Active Test.

Click here

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8.	ADJUST, REPAIR OR REPLACE

Result	Proceed to
When adjusting or repairing	A
When replacing	B

B

GO TO STEP 10

A

9.	CLEAR DTC*

(a) Clear the DTCs.

Click here

Body Electrical > Blind Spot Monitor Master > Clear DTCs Body Electrical > Blind Spot Monitor Slave > Clear DTCs

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GO TO STEP 10

10.	PERFORM BEAM AXIS CONFIRMATION

(a) Confirm the blind spot monitor beam axis display and perform the blind spot monitor beam axis adjustment.

Click here

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11.	PERFORM CONFIRMATION TEST*

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END