Clearance Sonar System Clearance Sonar Main Switch Circuit

Body Electrical. Lexus Is250, Is220D. Gse20 Ale20
Park Assist Monitoring. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK MULTIPLEX COMMUNICATION SYSTEM

READ VALUE OF INTELLIGENT TESTER

PERFORM SATELLITE SWITCH

REPLACE CLEARANCE WARNING ECU ASSEMBLY

CHECK OPERATION CLEARANCE SONAR SYSTEM

CLEARANCE SONAR SYSTEM - Clearance Sonar Main Switch Circuit


DESCRIPTION

The clearance sonar main switch is installed on the instrument panel safety pad assembly.
When the clearance sonar main switch in turned ON, an ON signal is sent to the clearance warning ECU through the BEAN line. The clearance sonar system operates according to this signal.

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Park Assist Monitoring.Clearance Sonar System.Clearance Sonar System Clearance Sonar Main Switch Circuit


INSPECTION PROCEDURE

1.CHECK MULTIPLEX COMMUNICATION SYSTEM
Refer to how to proceed with troubleshooting (Click here).
If the multiplex communication system is operating normally, proceed to the next step.

NEXT


2.READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch ON (IG).

  1. Turn the intelligent tester main switch ON.

  1. Turn the clearance sonar main switch ON.

  1. Select the item below in the Data List, and read its value displayed on the intelligent tester to check the clearance sonar main switch.

    Result:

    Clearance warning ECU:
    Item
    		Measurement / Range (Display)
    		Normal Condition
    		Diagnostic Note
    MAIN SW
    		Clearance sonar main switch / OFF or ON
    		OFF: Clearance sonar main switch OFF
    ON: Clearance sonar main switch ON
    		-


OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG


3.PERFORM SATELLITE SWITCH

  1. Check operation speed and tach indicator system (Click here).

    Result:
    Result
    		Proceed to
    The system operates normally
    		OK
    The system does not operate normally
    		NG


NG
GO TO COMBINATION METER SYSTEM
OK


4.REPLACE CLEARANCE WARNING ECU ASSEMBLY

  1. Replace the clearance warning ECU (Click here).


NEXT


5.CHECK OPERATION CLEARANCE SONAR SYSTEM

  1. Check the operation of the clearance sonar system (Click here).

    Result:
    Result
    		Proceed to
    The system operates normally
    		OK
    The system does not operate normally
    		NG


NG
REPLACE COMBINATION METER ASSEMBLY
OK

END