Diagnosis Procedure
1.
CHECK REAR SONAR SENSOR SIGNAL LH INNER CIRCUIT (OPEN)
Turn ignition switch OFF.
Disconnect sonar control unit connector and rear sonar sensor LH inner connector.
Check continuity between sonar control unit harness connector and rear sonar sensor LH inner connector
Sonar control unit
Rear sonar sensor LH inner
Continuity
Connector
Terminal
Connector
Terminal
B20
21
B459
2
Existed
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 unit
Rear sonar sensor LH inner
Continuity
Connector
Terminal
Connector
Terminal
B20
14
B459
3
Existed
Is the inspection result normal?
.
Repair the harness or connector.
3.
CHECK REAR SONAR SENSOR SIGNAL LH INNER
Connect sonar control unit connector and rear sonar sensor LH inner connector.
Turn ignition switch ON.
Check the signal between sonar control unit terminals as per the following condition.
+
−
Condition
Voltage
Sonar control unit
Connector
Terminal
Connector
Terminal
B20
21
B20
14
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
.