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Diagnosis Procedure
1.CHECK SONAR CONTROL UNIT CONNECTOR AND EACH FRONT SONAR SENSOR CONNECTOR
Check the terminals and connectors of each front sonar sensor and sonar control unit for damage, bends, and looseness.
Is the inspection result normal?
.
Repair or replace applicable malfunctioning parts.
 
2.CHECK OPEN CIRCUIT BETWEEN SONAR CONTROL UNIT AND SENSOR
  1. Turn ignition switch OFF.
  2. Disconnect sonar control unit connector and each front sonar sensor connector.
  3. Check continuity between sonar control unit harness connector and each front sonar sensor harness connector.
    Sonar control unitEach sonar sensorContinuity
    ConnectorTerminalConnectorTerminal
    B2011Front sonar sensor LH outerE3041Existed
    Front sonar sensor LH innerE3051
    Front sonar sensor RH innerE3061
    Front sonar sensor RH outerE3071
    Front sonar sensor LH sideE3081
    Front sonar sensor RH sideE3091
Is the inspection result normal?
.
Repair harness or connector.
 
3.CHECK INTERMITTENT INCIDENT
Perform intermittent incident. Refer to Intermittent IncidentIntermittent Incident.
Is the inspection result normal?
Replace the sonar control unit. Refer to Removal and Installation.
Repair or replace the applicable malfunctioning parts.