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Diagnosis Procedure
1.CHECK REAR SONAR SENSOR SIGNAL LH INNER CIRCUIT (1)
  1. Turn ignition switch OFF.
  2. Disconnect sonar control unit connector and rear sonar sensor LH inner connector.
  3. Turn ignition switch ON.
  4. Check voltage between sonar control unit harness connector and ground.
    Sonar control unit(-)Voltage (Approx. )
    ConnectorTerminal
    B2021Ground0 V
Is the inspection result normal?
Repair harness or connector.
 
2.CHECK REAR SONAR SENSOR SIGNAL LH INNER CIRCUIT (2)
  1. Turn ignition switch OFF.
  2. Check continuity between rear sonar sensor LH inner harness connector and ground.
Rear sonar sensor LH innerGroundContinuity
ConnectorTerminal
B4592Not existed
Is the inspection result normal?
.
Repair the harness or connector.
 
3.PERFORM DTC CONFIRMATION PROCEDURE AGAIN
With M.U.T.-III SE
  1. Turn ignition switch ON.
  2. Erase DTC.
  3. Perform DTC confirmation procedure again. Refer to DTC DescriptionDTC Description.
Is DTC B2721-88 detected again?
Replace the rear sonar sensor LH inner. Refer to Removal and Installation.
INSPECTION END