Perform the diagnosis for the displayed DTCs or
cancel codes. (Perform the diagnosis for the side that displayed DTCs or
cancel codes.)
2.
Repair or replace the cause of trouble.
3.
Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory
Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Check List for Interview
CHECK
Inspect the following items regarding the vehicle’s state.
Blind Spot Detection/Rear Cross Traffic Alert Check List for Interview
Date of Vehicle Bring-in Year Month Date
Customer’s name
Registration No.
Initial year of registration
Year Month Date
Vehicle model
Frame number
Interviewer
Inspector
Engine type
Odometer reading
Customer specified content
•
•
•
Date when problem occurred
Year Month Date
Frequency of trouble occurrence
Always occurs
Sometimes occurs ( times per day, times per month)
Condition of trouble occurrence
(How the trouble occurs)
Weather
Fine • Cloudy • Rainy • Snowy • Others ( )
Temperature
°C (°F) — °C (°F)
Road conditions
Occurrence location
Accessory installation condition
Confirmation of trouble condition
Diagnostic trouble code
Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > General Description
CAUTION
1. BSD/RCTA
In some cases, BSD/RCTA may not work correctly under the following conditions.
In bad weather such as heavy rain, fog, snow, sand storm, etc.
When ice, snow, dirt, etc. cover the rear bumper.
When the rear bumper has scratches or deformation in the area of the radar sensor.
When a difference of vehicle speeds between your own vehicle and another vehicle within the detection range is too large.
When there is another vehicle remaining within the detection range while your own vehicle starts from stationary state.
While driving on a steep slope with a series of uphills and downhills.
While driving on a wet road with such as puddles.
When more than one vehicle is approaching one after another with a short distance.
When vehicle speed of your own vehicle is almost the same as that of the vehicle within the detection range.
When a difference of the vehicle heights between your own vehicle and another vehicle in the next lane is too large.
Immediately after operating the BSD/RCTA OFF switch.
On wide lanes, when another vehicle of the next
lane drives along the opposite edge so the distance is too large for the
detection.
Basically, BSD/RCTA does not detect the
following types of vehicle as well as objects other than vehicles;
however, it may detect them depending on circumstances.
Oncoming vehicle
Small motorcycle, bike, pedestrian, etc.
Vehicle following behind on the same lane
Stationary objects such as guardrail, wall, sign and parked vehicle
Another vehicle driving on two lanes away
BSD/RCTA may perform unnecessary detection in the following conditions.
When guardrails or walls are close enough to be within the detection range.
When distance from the vehicle behind is short.
On narrow lanes, when another vehicle driving on two lanes away enters the detection range.
Radar sensors of BSD/RCTA are each located on LH and RH sides. Always observe the followings for proper operation of the system.
Always clean the vicinity of radar sensors.
Do not give a strong impact to the radar sensor
areas. Displacement of the radar sensors may result in improper
operation of the system such that it may not detect the vehicle entering
the detection range.
Do not disassemble the radar sensors.
Do not scratch or deform the bumper areas with the radar sensors.
Replace the rear bumper in the following cases.
When there is any collision trace or dent inside the radar projection area.
When there is any scuffed (chipped off) section inside the radar projection area on the resin bumper.
When there is any crack inside the radar projection area.
Radar projection area
(a)
Radar projection area
For other flaws, perform the sensor readjustment. If no problem is found, replacement is unnecessary.
Do not put a sticker, etc. on/around the radar sensors.
Do not retrofit the radar sensors or the bumper close to the radar sensors.
Do not repaint the radar sensors or the bumper close to the radar sensors.
If there is any painting defect inside the radar projection area, replace the rear bumper without trying to repair it.
Do not give a strong impact, force or drop-off to the radar sensors because they are precision devices.
Do not reuse the radar sensors that were affected by strong impact, force, or fell off.
Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > General Description
INSPECTION
1. BASIC INSPECTION
Before performing diagnosis, check the following items that might provoke the problems related to BSD/RCTA.
Check the connecting condition of harness and connector. Also check grounding.
Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > General Description
PREPARATION TOOL
1. SPECIAL TOOL
ILLUSTRATION
TOOL NUMBER
DESCRIPTION
REMARKS
—
SUBARU SELECT MONITOR 4
Used for setting of each function and troubleshooting for electrical system.
For detailed operation procedures, refer to “Help” of application.
2. GENERAL TOOL
TOOL NAME
REMARKS
Circuit tester
Used for measuring resistance, voltage and current.
DST-i
Used together with Subaru Select Monitor 4.
Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > General Description
SYSTEM BLOCK DIAGRAM
BSD/RCTA system is configured by the following components.
There is a control ECM in the radar sensor main body, which performs the vehicle identification and the alert judgment control.
The LH/RH radar sensors are identified as
Master/Slave for control purposes. They are connected by the private CAN
to execute the controls through mutual communication. The radar on the
Master side receives the input from the vehicle CAN and the BSD/RCTA OFF
switch, so information necessary for control can be obtained from other
modules via the vehicle CAN.
The outer mirror LED is directly driven by the signal from the radar sensor.
It is possible to diagnose the DTC by performing
the indicated inspection mode. After correcting the DTC, perform a
necessary inspection mode and make sure that the function is resumed
correctly and the DTC is recorded.
1. INSPECTION MODE 1
DTC
Items
Note
B2304
Rear RADAR ON-OFF Switch Stuck
—
B2311
Rear RADAR Detect TCM
—
B2313
Rear RADAR Detect VDC
—
B2327
Rear RADAR internal failure (internal electric circuit)
—
B2350
Rear RADAR Communication error between Master and Slave
—
B2351
Rear RADAR Lost Communication between Master and Slave
—
U0073
Control Module Communication Bus Off
—
U0101
LOST COMMUNICATION WITH TCM
—
U0122
Lost Communication With Vehicle Dynamics Control Module
—
U0140
Lost Communication With Body Control Module
—
U0155
LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE
—
U0402
INVALID DATA RECEIVED FROM TCM
—
U0416
Invalid Data Received From VDC
—
U0422
INVALID DATA RECEIVED FROM BODY CONTROL MODULE
—
U0423
INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE
—
U1235
LOST COMMUNICATION WITH EyeSight
—
U1433
INVALID DATA RECEIVED FROM EyeSight
—
1.
Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory
If the DTC is displayed on the screen, the
trouble is still present. Perform the diagnosis for the displayed DTCs.
After solving the DTC, repeat from step 1).
Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory
If the DTC is displayed on the screen, the
trouble is still present. Perform the diagnosis for the displayed DTCs.
After solving the DTC, repeat from step 1).
Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory
If the DTC is displayed on the screen, the
trouble is still present. Perform the diagnosis for the displayed DTCs.
After solving the DTC, repeat from step 1).
Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Data Monitor
LIST
Blind Spot Detection/Rear Cross Traffic Alert(LH)
Items
Contents
Standard/Unit
Note
SRVD System fail flag
Current failure status of BSD/RCTA system is displayed.
Normal
Fail
—
SRVD System HALT flag
Current temporary stop status of BSD/RCTA system is displayed.
Temporary stop: Temporarily stops when reception
of radar sensor waves failed due to some obstacles or when the
temperature is not within the range of −40°C (−40°F) — 85°C (185°F).
Temporarily stops when the direction of the radar sensor is not correct.
Normal
Halt
—
SRVD System ON-OFF flag
ON/OFF status of BSD/RCTA system is displayed. If this flag is set to [OFF] while the values of [SRVD System fail flag] and [SRVD System HALT flag] are [Normal], the BSD/RCTA system is set to OFF by the BSD/RCTA OFF switch.
OFF
ON
—
LH-Side BSD caution 1st flag
ON is displayed when the 1st stage BSD warning on the left side is activated (when the outer mirror assembly illuminates).
OFF
ON
—
LH-Side LCA caution 1st flag
ON is displayed when the 1st stage LCA warning on the left side is activated (when the outer mirror assembly illuminates).
OFF
ON
—
LH-Side RCTA caution flag
ON is displayed when the RCTA warning on the
left side is activated (when the outer mirror assembly illuminates and
buzzer sounds).
OFF
ON
—
LH-Side Radar Voltage value
Power supply voltage of the radar sensor LH is displayed.
0 — 25.5 V
—
LH-Side Temperature value
Ambient temperature of the radar sensor LH is displayed.
−128 — 127°C
—
Vehicle Series status
Vehicle recognition status
Impreza Type
Forester Type
−
B Series
WRX Type
ASCENT Type
—
Vehicle Type Series status
Vehicle type recognition status
SDN
WGN
OBK/XV
—
brightness Mode
Indicator brightness
Day
Night
—
Destination Type
Destination status
Japan
U.S.A
Canada
EU
EK
reserve
Australia
China
−
—
LH-Side Autoalignment Result
Left side radar auto alignment result
−3276.8 — 3276.8 deg
—
Emergency Lane Keep Setting
Presence or absence of ELK
Support
Not Exist
—
EyeSight Setting
Presence or absence of the EyeSight
Support
Not Exist
—
Blind Spot Detection/Rear Cross Traffic Alert(RH)
Items
Contents
Standard/Unit
Note
SRVD System fail flag
Current failure status of BSD/RCTA system is displayed.
Normal
NG
—
SRVD System HALT flag
Current temporary stop status of BSD/RCTA system is displayed.
Temporary stop: Temporarily stops when reception
of radar sensor waves failed due to some obstacles or when the
temperature is not within the range of −40°C (−40°F) — 85°C (185°F).
Temporarily stops when the direction of the radar sensor is not correct.
Normal
Halt
—
SRVD System ON-OFF flag
ON/OFF status of BSD/RCTA system is displayed. If this flag is set to [OFF] while the values of [SRVD System fail flag] and [SRVD System HALT flag] are [Normal], the BSD/RCTA system is set to OFF by the BSD/RCTA OFF switch.
OFF
ON
—
RH-Side BSD caution 1st flag
ON is displayed when the 1st stage BSD warning on the right side is activated (outer mirror assembly illuminates).
OFF
ON
—
RH-Side LCA caution 1st flag
ON is displayed when the 1st stage LCA warning on the right side is activated (outer mirror assembly illuminates).
OFF
ON
—
RH-Side RCTA caution flag
ON is displayed when the RCTA warning on the
right side is activated (when the outer mirror assembly illuminates and
buzzer sounds).
OFF
ON
—
RH-Side Radar Voltage value
Power supply voltage of the radar sensor RH is displayed.
0 — 25.5 V
—
RH-Side Temperature value
Ambient temperature of the radar sensor RH is displayed.
Current failure status of BSD/RCTA system is displayed.
No occurrence
Failure
—
SRVD System HALT flag
Current temporary stop status of BSD/RCTA system is displayed.
Temporary stop: Temporarily stops when reception
of radar sensor waves failed due to some obstacles or when the
temperature is not within the range of −40°C (−40°F) — 85°C (185°F).
Temporarily stops when the direction of the radar sensor is not correct.
No occurrence
Halt
—
SRVD System ON-OFF flag
If this flag is set to [OFF] while the values of [SRVD System fail flag] and [SRVD System HALT flag] (which show the ON/OFF status of the BSD/RCTA system) are [Normal], the BSD/RCTA system is set to OFF by the BSD/RCTA OFF switch.
OFF
ON
—
LH-Side BSD caution 1st flag
ON is displayed when the 1st stage BSD warning on the left side is activated (when the outer mirror assembly illuminates).
OFF
ON
—
LH-Side LCA caution 1st flag
ON is displayed when the 1st stage LCA warning on the left side is activated (when the outer mirror assembly illuminates).
OFF
ON
—
LH-Side RCTA caution flag
ON is displayed when the RCTA warning on the
left side is activated (when the outer mirror assembly illuminates and
buzzer sounds).
OFF
ON
—
LH-Side Radar Voltage value
Power supply voltage of the radar sensor LH is displayed.
0 — 25.5 V
—
LH-Side Temperature value
Ambient temperature of the radar sensor LH is displayed.
−128 — 127°C
—
Vehicle Series status
Vehicle recognition status
Impreza Type
Forester Type
−
B Series
WRX Type
—
Vehicle Type Series status
Vehicle type recognition status
SDN
WGN
OBK/XV
—
brightness Mode
Indicator brightness
Day
Night
—
Destination Type
Destination status
Japan
U.S.A
Canada
EU
EK
reserve
Australia
China
−
—
LH-Side Autoalignment Result
Left side radar auto alignment result
−3276.8 — 3276.8 deg
—
SSMID
Identification Option Vehicle Manufacturer Specific Data Identifier
—
—
ROMID
application Data Identification Data Identifier
—
—
ECM Software Ver.
vehicle Manufacturer ECM Software Version Number Data Identifier
—
—
ECM Part No.
vehicle Manufacturer Kit Assembly Part Number Data Identifier
Current failure status of BSD/RCTA system is displayed.
No occurrence
Failure
—
SRVD System HALT flag
Current temporary stop status of BSD/RCTA system is displayed.
Temporary stop: Temporarily stops when reception
of radar sensor waves failed due to some obstacles or when the
temperature is not within the range of −40°C (−40°F) — 85°C (185°F).
Temporarily stops when the direction of the radar sensor is not correct.
No occurrence
Halt
—
SRVD System ON-OFF flag
If this flag is set to [OFF] while the values of [SRVD System fail flag] and [SRVD System HALT flag] (which show the ON/OFF status of the BSD/RCTA system) are [Normal], the BSD/RCTA system is set to OFF by the BSD/RCTA OFF switch.
OFF
ON
—
RH-Side BSD caution 1st flag
ON is displayed when the 1st stage BSD warning on the right side is activated (outer mirror assembly illuminates).
OFF
ON
—
RH-Side LCA caution 1st flag
ON is displayed when the 1st stage LCA warning on the right side is activated (outer mirror assembly illuminates).
OFF
ON
—
RH-Side RCTA caution flag
ON is displayed when the RCTA warning on the
right side is activated (when the outer mirror assembly illuminates and
buzzer sounds).
OFF
ON
—
RH-Side Radar Voltage value
Power supply voltage of the radar sensor RH is displayed.
0 — 25.5 V
—
RH-Side Temperature value
Ambient temperature of the radar sensor RH is displayed.
−128 — 127°C
—
RH-Side Autoalignment Result
Right side radar auto alignment result
−3276.8 — 3276.8 deg
—
SSMID
Identification Option Vehicle Manufacturer Specific Data Identifier
—
—
ROMID
application Data Identification Data Identifier
—
—
ECM Software Ver.
vehicle Manufacturer ECM Software Version Number Data Identifier
—
—
ECM Part No.
vehicle Manufacturer Kit Assembly Part Number Data Identifier
—
—
System
system Name Or Engine Type Data Identifier
—
—
Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Active Test
OPERATION
1.
On [Start] screen, select [Diagnosis].
2.
On [Vehicle selection] screen, input the target vehicle information and select [OK].
3.
On [Main Menu] screen, select [Each System].
4.
On [Select System] screen, select [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)], and then select [Enter].
5.
On [Select Function] screen, select [Active Test].
For detailed operation procedures, refer to “Help” of application.
DTC B2327 REAR RADAR INTERNAL FAILURE (INTERNAL ELECTRIC CIRCUIT)
DTC detecting condition:
Defective radar sensor
Trouble symptom:
All functions of BSD/RCTA stop.
Fail icon is displayed in the combination meter LCD display.
Failure-related notification is displayed for approx. two seconds on LCD display in the combination meter.
Check and replace the side that displayed the DTC.
1. CHECK BSD/RCTA.
1.
Turn the ignition switch to ON.
2.
Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory
Repair the open circuit of harness between radar sensor RH connector and radar sensor LH connector.
3. CHECK HARNESS (SHORT BETWEEN LINES, GROUND SHORT CIRCUIT).
Using a tester, measure the resistance between
radar sensor LH connectors (harness side) and the resistance between
radar sensor LH connector (harness side) and chassis ground.
Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory
Repair the open circuit of harness between radar sensor RH connector and radar sensor LH connector.
3. CHECK HARNESS (SHORT BETWEEN LINES, GROUND SHORT CIRCUIT).
Using a tester, measure the resistance between
radar sensor LH connectors (harness side) and the resistance between
radar sensor LH connector (harness side) and chassis ground.
Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory
Temporarily stops because the temperature is
outside the operative range (−40°C (−40°F) — 85°C (185°F)). Returns to
normal when the ambient temperature falls within the operative range.
B2341
Rear RADAR degradation of detecting performance
Temporarily stops because some obstacles blocked
radar waves of the back and side radar. Returns to normal when the
transmission and reception of radar signals becomes normal.
Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Check List for Interview