Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect sonar control unit connector and rear center sensor LH connector.
3. Check continuity between sonar control unit connector and rear center sensor LH connector.

   Sonar control unit		Rear center sensor LH		Continuity
   Connector	Terminal	Connector	Terminal
   M47	7	B263	2	Existed

4. Check for continuity between sonar control unit and ground.

   Sonar control unit		Ground	Continuity
   Connector	Terminal
   M47	7		Not existed

Is the check result normal?

YES 

GO TO STEP 2. 

NO 

Repair the harnesses or connectors.

Check continuity between sonar control unit connector and rear center sensor LH connector.

Is the check result normal?

YES 

Replace rear center sensor LH. Refer to REMOVAL AND INSTALLATION .

NO 

Repair the harnesses or connectors.