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Diagnosis Procedure
1.CHECK REAR SONAR SENSOR SIGNAL LH INNER CIRCUIT (OPEN)
  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 harness connector and rear sonar sensor LH inner connector
    Sonar control unitRear sonar sensor LH innerContinuity
    ConnectorTerminalConnectorTerminal
    B2021B4592Existed
Is the inspection result normal?
.
Repair the harness or connector.
 
2.CHECK REAR SONAR SENSOR LH INNER GROUND CIRCUIT
Check continuity between sonar control unit harness connector and rear sonar sensor LH inner harness connector.
Sonar control unitRear sonar sensor LH innerContinuity
ConnectorTerminalConnectorTerminal
B2014B4593Existed
Is the inspection result normal?
.
Repair the harness or connector.
 
3.CHECK REAR SONAR SENSOR SIGNAL LH INNER
  1. Connect sonar control unit connector and rear sonar sensor LH inner connector.
  2. Turn ignition switch ON.
  3. Check the signal between sonar control unit terminals as per the following condition.
    +−ConditionVoltage
    Sonar control unit
    ConnectorTerminalConnectorTerminal
    B2021B2014
    • Shift position is in R position.
    • When the sensor is detecting an obstacle
Is the inspection result normal?
Replace the sonar control unit. Refer to Removal and Installation.
Replace the rear sonar sensor LH inner. Refer to Removal and Installation.