Diagnosis Procedure
1.
CHECK REAR SONAR SENSOR SIGNAL LH INNER CIRCUIT (1)
Turn ignition switch OFF.
Disconnect sonar control unit connector and rear sonar sensor LH inner connector.
Turn ignition switch ON.
Check voltage between sonar control unit harness connector and ground.
Sonar control unit
(-)
Voltage (Approx. )
Connector
Terminal
B20
21
Ground
0 V
Is the inspection result normal?
Repair harness or connector.
2.
CHECK REAR SONAR SENSOR SIGNAL LH INNER CIRCUIT (2)
Turn ignition switch OFF.
Check continuity between rear sonar sensor LH inner harness connector and ground.
Rear sonar sensor LH inner
Ground
Continuity
Connector
Terminal
B459
2
Not existed
Is the inspection result normal?
.
Repair the harness or connector.
3.
PERFORM DTC CONFIRMATION PROCEDURE AGAIN
With M.U.T.-III SE
Turn ignition switch ON.
Erase DTC.
Perform DTC confirmation procedure again. Refer to DTC Description
DTC Description
.
Is DTC B2721-88 detected again?
Replace the rear sonar sensor LH inner. Refer to
Removal and Installation
.
INSPECTION END