DESCRIPTION
This circuit consists of the No. 1 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 TECHSTREAM |
(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 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 |
---|---|---|---|
Front Buzzer | No. 1 clearance warning buzzer | Stop or Operate | Confirm that the vehicle is stopped and the engine switch is on (IG) |
Tester Display |
---|
Front Buzzer |
OK:
The No. 1 clearance warning buzzer sounds.
OK | ![]() | REPLACE CLEARANCE WARNING ECU ASSEMBLY |
|
2. | CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - NO. 1 CLEARANCE WARNING BUZZER) |
(a) Disconnect the J38 clearance warning ECU assembly connector.
(b) Disconnect the J17 No. 1 clearance warning buzzer connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J38-14 (CBZ) - J17-1 (Z+) | Always | Below 1 Ω |
J38-13 (EF) - J17-2 (Z-) | Always | Below 1 Ω |
J38-14 (CBZ) or J17-1 (Z+) - Body ground | Always | 10 kΩ or higher |
J38-13 (EF) or J17-2 (Z-) - Body ground | Always | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. | REPLACE NO. 1 CLEARANCE WARNING BUZZER |
(a) Replace the No. 1 clearance warning buzzer with a new or known good one.
Click here
|
4. | PERFORM ACTIVE TEST USING TECHSTREAM |
(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 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 |
---|---|---|---|
Front Buzzer | No. 1 clearance warning buzzer | Stop or Operate | Confirm that the vehicle is stopped and the engine switch is on (IG) |
Tester Display |
---|
Front Buzzer |
OK:
The No. 1 clearance warning buzzer sounds.
OK | ![]() | END |
NG | ![]() | REPLACE CLEARANCE WARNING ECU ASSEMBLY |
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Front Door Opening Trim Weatherstrip: Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. INSTALL FRONT DOOR OPENING TRIM WEATHERSTRIP (a) Align the alignment mark on the front door opening trim weatherstrip with the flange on the ...
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Intelligent Clearance Sonar System: ENG / EHV Device (C1A40)
DESCRIPTION When an EFI system malfunction signal sent by the ECM is detected by the clearance warning ECU assembly, DTC C1A40 is stored. DTC No. Detection Item DTC Detection Condition Trouble Area C1A40 ENG / EHV Device When the engine switch is on (IG), an EFI system malfunction s ...