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Diagnosis Procedure
1.CHECK REAR SONAR SENSOR SIGNAL LH OUTER CIRCUIT (SHORT)
  1. Turn ignition switch OFF.
  2. Disconnect sonar control unit connector and rear sonar sensor LH outer connector.
  3. Check continuity between sonar control unit harness connector and ground.
Sonar control unitGroundContinuity
ConnectorTerminal
B2022Not existed
Is the inspection result normal?
Replace the rear sonar sensor LH outer. Refer to Removal and Installation.
Repair the harness or connector.