Diagnosis Procedure

SONAR CANCEL SWITCH CIRCUIT


Description

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




SONAR CANCEL SWITCH CIRCUIT


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