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

(a) Ask the customer about the problems and the conditions at the time the malfunction occurred to make sure the problem symptom was not temporarily caused by radio waves in the surrounding environment.

HINT:

The parking assist monitor display may be temporarily distorted due to radio waves around the vehicle.

Problem Symptom	Cause
The problem symptom indicates a parking assist monitor display malfunction and the problem symptom cannot be reproduced.	The display may be temporarily distorted when the vehicle is close to an object that transmits radio waves, such as a telecommunication tower, an airport or a truck equipped with a transceiver.

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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.

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4.	SYSTEM CHECK

(a) Check the vehicle specification.

Result	Proceed to
w/ Navigation System	A
w/ Audio and Visual System	B

B

GO TO STEP 6

A

5.	CHECK NAVIGATION SYSTEM

(a) Refer to Navigation System.

Click here

OK:

Navigation system is normal.

OK

GO TO STEP 7

NG

GO TO NAVIGATION SYSTEM

6.	CHECK AUDIO AND VISUAL SYSTEM

(a) Refer to the Audio and Visual System.

for 12.3 Inch Display: Click here

for 8 Inch Display: Click here

OK:

Audio and visual system is normal.

NG

GO TO AUDIO AND VISUAL SYSTEM

OK

7.	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 DTCs are not output	A
CAN DTCs are output	B

B

GO TO CAN COMMUNICATION SYSTEM

A

8.	CHECK FOR DTC*

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

Chassis > Circumference Monitoring Camera Control Module > Trouble Codes

(b) Clear the DTCs.

Chassis > Circumference Monitoring Camera Control Module > Clear DTCs

(c) Recheck for DTCs. Try to reproduce the DTC by simulating the original activity that the DTC suggests.

Chassis > Circumference Monitoring Camera Control Module > Trouble Codes

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

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

9.	PROBLEM SYMPTOMS TABLE

(a) Refer to the 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 11

A

10.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Data List / Active Test

Click here

(b) Terminals of ECU

Click here

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11.	ADJUST, REPAIR OR REPLACE

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12.	CONFIRMATION TEST

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END