DTC B2328: Rear Radar Internal Failure (Radar Misalignment)

Detecting condition: 

• Excessive impact was given to the installation area of the radar sensor, which resulted in deviation of the radar sensor axis.
• Mounting bracket for the radar sensor is deformed.
• Defective radar sensor

TROUBLE SYMPTOMS: 

• All functions of BSD/RCTA are temporarily suspended.
• The icon indicating function suspended will be displayed in the combination meter LCD display.
• Function-suspended confirmation will be displayed for approx. two seconds on LCD display in the combination meter.

1. CHECK REAR BUMPER  .

   Check the rear bumper. (Stickered, trace of repainting, etc.)

   Is the check result OK?

   Yes  : Go to  2.

   No  : Replace or repair the bumper, and Go to   2 .  Ref. to EXTERIOR/INTERIOR TRIM>REAR BUMPER

2. VISUALLY CHECK INSTALLATION CONDITION OF RADAR SENSOR  .
   1. Remove the rear bumper. Ref. to EXTERIOR/INTERIOR TRIM>REAR BUMPER
   2. Visually check the mounting bracket of the radar sensor as well as its installation position. (Visible damage, deformation, etc.)

   Is the check result OK?

   Yes  : Go to  3.

   No  : Replace the mounting bracket of the radar sensor, or repair the installation position, and Go to   3 .  Ref. to BLIND SPOT DETECTION/REAR CROSS TRAFFIC ALERT>RADAR SENSOR

3. CHECK INSTALLATION CONDITION OF RADAR SENSOR  .

   Check the installation condition of the radar sensor. Ref. to BLIND SPOT DETECTION/REAR CROSS TRAFFIC ALERT>RADAR SENSOR>INSPECTION

   Is the check result OK?

   Yes  : Go to  4.

   No  : Replace the mounting bracket of the radar sensor, or repair the installation position, and Go to   4 .  Ref. to BLIND SPOT DETECTION/REAR CROSS TRAFFIC ALERT>RADAR SENSOR

4. ADJUSTMENT OF RADAR SENSOR AXIS  .
   1. Install the rear bumper.
   2. Perform the adjustment of radar axis. Ref. to BLIND SPOT DETECTION/REAR CROSS TRAFFIC ALERT>RADAR SENSOR>ADJUSTMENT
   3. Read the [Cancel Code] of [Blind Spot Detection/Rear Cross Traffic Alert (RH)] or [Blind Spot Detection/Rear Cross Traffic Alert (LH)] using the Subaru Select Monitor. Ref. to BLIND SPOT DETECTION/REAR CROSS TRAFFIC ALERT (DIAGNOSTICS)>CANCEL CODE 

   Is DTC B2328 displayed?

   Yes  : Replace the radar sensor. Ref. to BLIND SPOT DETECTION/REAR CROSS TRAFFIC ALERT>RADAR SENSOR

   No  : The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

   NOTE:

   In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.