Toyota Parking Assist-Sensor System (W/ Multi-Display) Clearance Warning Buzzer Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING GTS

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - CLEARANCE WARNING BUZZER)

REPLACE NO. 1 CLEARANCE WARNING BUZZER

PERFORM ACTIVE TEST USING GTS

TOYOTA PARKING ASSIST-SENSOR SYSTEM (w/ Multi-display) - Clearance Warning Buzzer Circuit


DESCRIPTION

The No. 1 clearance warning buzzer is an ECU-operated buzzer that sounds when it receives a pulsed digital signal from the ECU. The ECU operates the buzzer so that it sounds in a pattern that changes depending on the distance to the obstacle.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Park Assist Monitoring.Toyota Parking Assist-Sensor System (W/ Multi-Display).Toyota Parking Assist-Sensor System (W/ Multi-Display) Clearance Warning Buzzer Circuit


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST USING GTS

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Body / Clearance Sonar / Active Test.

  1. Check that the buzzer operates by performing the Active Test.

    Clearance Sonar
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Buzzer
    		No. 1 clearance warning buzzer/ Operate or Stop
    		Operate: No. 1 clearance warning buzzer ON
    Stop: No. 1 clearance warning buzzer OFF
    		Confirm that the vehicle is stopped and the engine switch is on (IG)
    OK:
    The No. 1 clearance warning buzzer sounds.


NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser X394000005X0CRD.html)

2.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - CLEARANCE WARNING BUZZER)

  1. Disconnect the I1*1 or G154*2 clearance warning ECU connector.

    1. *1: for 4 Sensor Type
    2. *2: for 8 Sensor Type

  1. Disconnect the G161 No. 1 clearance warning buzzer connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    for 4 Sensor Type
    Tester Connection
    		Condition
    		Specified Condition
    I1-10 (BBZ) - G161-1 (Z+)
    		Always
    		Below 1 Ω
    I1-11 (EF) - G161-2 (Z-)
    		Always
    		Below 1 Ω
    I1-10 (BBZ) - Body ground
    		Always
    		10 kΩ or higher
    I1-11 (EF) - Body ground
    		Always
    		10 kΩ or higher
    for 8 Sensor Type
    Tester Connection
    		Condition
    		Specified Condition
    G154-10 (BBZ) - G161-1 (Z+)
    		Always
    		Below 1 Ω
    G154-11 (EF) - G161-2 (Z-)
    		Always
    		Below 1 Ω
    G154-10 (BBZ) - Body ground
    		Always
    		10 kΩ or higher
    G154-11 (EF) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.REPLACE NO. 1 CLEARANCE WARNING BUZZER

  1. Replace the No. 1 clearance warning buzzer with a new or normally functioning one (LandCruiser RM00000470800XX.html).


NEXT


4.PERFORM ACTIVE TEST USING GTS

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Body Electrical / Clearance Sonar / Active Test.

  1. Check that the buzzer operates by performing the Active Test.

    Clearance Sonar
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Buzzer
    		No. 1 clearance warning buzzer/ Operate or Stop
    		Operate: No.1 clearance warning buzzer ON
    Stop: No. 1 clearance warning buzzer OFF
    		Confirm that the vehicle is stopped and the engine switch is on (IG)
    OK:
    The No. 1 clearance warning buzzer sounds.
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for LHD)
    		B
    NG (for RHD)
    		C


B
REPLACE CLEARANCE WARNING ECU (LandCruiser RM00000470800XX.html)

C
REPLACE CLEARANCE WARNING ECU (LandCruiser RM00000470500NX.html)
A

END (NO. 1 CLEARANCE WARNING BUZZER WAS DEFECTIVE)