Sonar Cancel Switch Circuit

SONAR CANCEL SWITCH CIRCUIT

Description

The sonar control unit turns the sonar system activation OFF when inputting the cancel switch signal.


Component Function Check


1. SONAR CONTROL UNIT DATA MONITOR INSPECTION

Check "CANCEL SW" with "DATA MONITOR" of "SONAR".





- INSPECTION END


Diagnosis Procedure


1. CHECK HARNESS CANCEL SWITCH SIGNAL CIRCUIT

1.Disconnect sonar control unit connector and cancel switch connector.
2.Check continuity between sonar control unit harness connector and cancel switch harness connector.





3.Check continuity between sonar control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- Repair harness or connector.

2. CHECK VOLTAGE SONAR CONTROL UNIT

1.Connect sonar control unit connector.
2.Turn ignition switch ON.
3.Check voltage between sonar control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Replace sonar control unit. Refer to "Removal and Installation" Removal and Replacement.

3. CHECK CANCEL SWITCH

1.Turn ignition switch OFF.
2.Check sonar cancel switch function. Refer to "Component Function Check" .
Is the inspection result normal?
YES- GO TO 4.
NO- Replace sonar cancel switch. Refer to "Removal and Installation" Removal and Installation.

4. CHECK HARNESS CANCEL SWITCH GROUND CIRCUIT

1.Turn ignition switch ON.
2.Check continuity between cancel switch harness connector and ground.





Is the inspection result normal?
YES- INSPECTION END
NO- Repair harness or connector.