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.
  NOTE: If DTC B2328 is detected repeatedly, check or replace the part corresponding to the cancel code.

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 Ref. to EXTERIOR/INTERIOR TRIM> REAR BUMPER .

   Go to  2 .

2. CHECK RADAR SENSOR BRACKET  .
   1. Remove the rear bumper. Ref. to EXTERIOR/INTERIOR TRIM> REAR BUMPER .
   2. Check the mounting bracket of the radar sensor as well as its installation position. (Visible damage, deformation, etc.) Ref. to BLIND SPOT DETECTION/REAR CROSS TRAFFIC ALERT>RADAR SENSOR .

      Is the check result OK?

      Yes  : Go to  3 .

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

3. 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 .
   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.