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

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.

2. Turn the engine switch ON (IG).

3. Turn the intelligent tester main switch ON.

4. Turn the clearance sonar main switch ON.

5. 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