Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK REAR SONAR SENSOR LH INNER CIRCUIT CONTINUITY 
   1. Turn ignition switch OFF.
   2. Disconnect sonar control unit connector and rear sonar sensor LH inner connector.
   3. Check continuity between sonar control unit connector M70 and rear sonar sensor LH inner connector B457.

      Sonar control unit		Rear sonar sensor LH inner		Continuity
      Connector	Terminal	Connector	Terminal
      M70	21	B457	2	Yes
      	14		1

   4. Check continuity between sonar control unit connector M70 and ground.

      Sonar control unit		Ground	Continuity
      Connector	Terminal
      M70	21	-	No

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace harness or connectors.

2. CHECK REAR SONAR SENSOR LH INNER SIGNAL CIRCUIT SHORT TO BATTERY 
   1. Turn ignition switch ON.
   2. Check voltage between sonar control unit connector M70 and ground.

      Sonar control unit		Ground	Voltage (Approx.)
      Connector	Terminal
      M70	21	-	0V

      Is the inspection result normal? 

      YES: Replace rear sonar sensor LH inner. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness or connectors.