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Component Function Check
1.CHECK REAR SONAR SENSOR SIGNAL LH SIDE CIRCUIT (OPEN)
  1. Turn ignition switch OFF.
  2. Disconnect sonar control unit connector and rear sonar sensor LH side connector.
  3. Check continuity between sonar control unit harness connector and rear sonar sensor LH side connector
    Sonar control unitRear sonar sensor LH sideContinuity
    ConnectorTerminalConnectorTerminal
    B4949B4632Existed
Is the inspection result normal?
.
Repair the harness or connector.
 
2.CHECK REAR SONAR SENSOR LH SIDE GROUND CIRCUIT
Check continuity between sonar control unit harness connector and rear sonar sensor LH side harness connector.
Sonar control unitRear sonar sensor LH sideContinuity
ConnectorTerminalConnectorTerminal
B2014B4633Existed
Is the inspection result normal?
.
Repair the harness or connector.
 
3.CHECK REAR SONAR SENSOR SIGNAL LH SIDE
  1. Connect sonar control unit connector and rear sonar sensor LH side 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
    B4949B2014
    • 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 side. Refer to Removal and Installation.