Lexus IS250 IS220d GSE20 ALE20 - PARK ASSIST / MONITORING

CLEARANCE SONAR SYSTEM - Clearance Sonar Main Switch Circuit

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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

Clearance Sonar System - Clearance Sonar Main Switch Circuit. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

1.CHECK MULTIPLEX COMMUNICATION SYSTEM

Refer to how to proceed with troubleshooting .

If the multiplex communication system is operating normally, proceed to the next step.

NEXT

2.READ VALUE OF INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.

Turn the engine switch ON (IG).

Turn the intelligent tester main switch ON.

Turn the clearance sonar main switch ON.

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

Check operation speed and tach indicator system .

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

Replace the clearance warning ECU .

NEXT

5.CHECK OPERATION CLEARANCE SONAR SYSTEM

Check the operation of the clearance sonar system .

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

NG

REPLACE COMBINATION METER ASSEMBLY

OK

END

LEXUS IS250, IS220d / GSE20 ALE20

PARK ASSIST / MONITORING

Lexus IS250 IS220d GSE20 ALE20

CLEARANCE SONAR SYSTEM

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

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