In The Electrical Parts Operation Status Screen, Blind Spot Detection/Rear Cross Traffic Alert On/Off Display Cannot Be Switched

Detecting condition:

Communication circuit, radar sensor or MFD is abnormal.

Wiring diagram:

Multi-function display (MFD) system Ref. to WIRING SYSTEM (IMPREZA MODEL)>MULTIFUNCTION DISPLAY (MFD) SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (EXCEPT FOR HEV))>MULTI-FUNCTION DISPLAY (MFD) SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>MULTI-FUNCTION DISPLAY (MFD) SYSTEM>WIRING DIAGRAM .
CAN communication system Ref. to WIRING SYSTEM (IMPREZA MODEL)>CAN COMMUNICATION SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (EXCEPT FOR HEV))>CAN COMMUNICATION SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>CAN COMMUNICATION SYSTEM>WIRING DIAGRAM .

G13617280

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to MULTI-FUNCTION DISPLAY (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .

CHECK IGNITION POWER SUPPLY CIRCUIT .
1. Turn the ignition switch to OFF.
2. Disconnect the MFD connector.
3. Turn the ignition switch to ON.
4. Using a tester, measure the voltage between the MFD connector and chassis ground.
  Connector and terminal
  
  (i122) No. 23 (+) - Chassis ground (-):
Is the voltage 10 V or more?

Yes: Repair or replace the open circuit of harness. (Check battery as well as fuse.)

No: Go to 2.
CHECK LAN SYSTEM .
Perform the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS) (EXCEPT FOR HEV)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE . Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

Is the check result OK?

Yes: Go to 3.

No: Perform the inspection according to the diagnosis for LAN system.
CHECK Blind Spot Detection/Rear Cross Traffic Alert .
Using the Subaru Select Monitor, read the DTCs of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Ref. to BLIND SPOT DETECTION/REAR CROSS TRAFFIC ALERT (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
- Blind: Spot Detection/Rear Cross Traffic Alert(RH)
- Blind Spot Detection/Rear Cross Traffic Alert(LH)
Are any DTCs displayed? (Current malfunction)

Yes: Perform the diagnosis according to displayed DTC. Ref. to BLIND SPOT DETECTION/REAR CROSS TRAFFIC ALERT (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

No: Replace the MFD. Ref. to INSTRUMENTATION/DRIVER INFO>MULTI-FUNCTION DISPLAY (MFD) .