DESCRIPTION
This circuit consists of the No. 2 clearance warning buzzer and clearance warning ECU assembly. An ECU-excited type buzzer is used. The ECU operates the buzzers using a sound pattern that changes depending on the distance to the obstacle.
WIRING DIAGRAM
PROCEDURE
1. | PERFORM ACTIVE TEST USING GTS (REAR BUZZER) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Advanced Parking Guidance/ICS/Intuitive P/A / Active Test.
(e) Check that the rear buzzer operates by performing the Active Test.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Active Test Tester Display | Measurement Item | Control Range | Diagnostic Note |
---|---|---|---|
Rear Buzzer | No. 2 clearance warning buzzer | Stop or Operate | Confirm that the vehicle is stopped and the engine switch is on (IG) |
Tester Display |
---|
Rear Buzzer |
OK:
The No. 2 clearance warning buzzer sounds.
OK | ![]() | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
2. | CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - NO. 2 CLEARANCE WARNING BUZZER) |
(a) Disconnect the J38 clearance warning ECU assembly connector.
(b) Disconnect the R64 No. 2 clearance warning buzzer connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J38-15 (BBZ) - R64-1 (Z+) | Always | Below 1 Ω |
J38-16 (ER) - R64-2 (Z-) | Always | Below 1 Ω |
J38-15 (BBZ) or R64-1 (Z+) - Body ground | Always | 10 kΩ or higher |
J38-16 (ER) or R64-2 (Z-) - Body ground | Always | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. | REPLACE NO. 2 CLEARANCE WARNING BUZZER |
(a) Replace the No. 2 clearance warning buzzer with a new or known good one.
w/o Rear No. 2 Seat: Click here
w/ Rear No. 2 Seat: Click here
|
4. | PERFORM ACTIVE TEST USING TECHSTREAM (REAR BUZZER) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Advanced Parking Guidance/ICS/Intuitive P/A / Active Test.
(e) Check that the rear buzzer operates by performing the Active Test.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Active Test Tester Display | Measurement Item | Control Range | Diagnostic Note |
---|---|---|---|
Rear Buzzer | No. 2 clearance warning buzzer | Stop or Operate | Confirm that the vehicle is stopped and the engine switch is on (IG) |
Tester Display |
---|
Rear Buzzer |
OK:
The No. 2 clearance warning buzzer sounds.
OK | ![]() | END |
NG | ![]() | REPLACE CLEARANCE WARNING ECU ASSEMBLY |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Intuitive Parking Assist System (w/ Intelligent Clearance Sonar System): Rear Left Sensor Malfunction (C1AE6)
DESCRIPTION The rear corner ultrasonic sensor LH is installed to the rear bumper. The clearance warning ECU assembly detects obstacles based on signals received from the rear corner ultrasonic sensor LH. If the rear corner ultrasonic sensor LH has an open circuit or other malfunction, it will not fu ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Navigation System: Speaker Circuit
DESCRIPTION If there is a short in a speaker circuit, the stereo component amplifier assembly detects it and stops output to the speakers. Thus sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly, DCM (telematics transceiver) or speakers ...