No Display Is Shown

Detecting condition: 

Power supply circuit, ground circuit, communication circuit or MFD is abnormal.

Wiring diagram: 

• Multi-function display (MFD) system Ref. to WIRING SYSTEM>Multi-function Display (MFD) System>WIRING DIAGRAM .
• CAN communication system Ref. to WIRING SYSTEM>CAN Communication System>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK POWER SUPPLY CIRCUIT  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the MFD connector.
   3. Using a tester, measure the voltage between the MFD connector and chassis ground.

   Connector & terminal 

   (i122) No. 24 (+) - Chassis ground (-):

   Is the voltage 10 V or more?

   Yes  : Go to  2.

   No  : Repair or replace the open circuit of harness. (Check battery as well as fuse.)

2. CHECK GROUND CIRCUIT (OPEN)  .

   Using a tester, measure the resistance between MFD connector and chassis ground.

   Connector & terminal 

   (i122) No. 21 - Chassis ground:

   Is the resistance less than 10 Ω?

   Yes  : Go to  3.

   No  : Repair or replace the open circuit of harness.

3. CHECK COMMUNICATION CIRCUIT (SHORT CIRCUIT TO GROUND)  .

   Using a tester, measure the resistance between MFD connector and chassis ground.

   Connector & terminal 

   (i122) No. 19 - Chassis ground:

   (i122) No. 20 - Chassis ground:

   Is the resistance 10 kΩ or more?

   Yes  : Go to  4.

   No  : Repair or replace the short circuit of the harness.

4. CHECK HARNESS BETWEEN MFD AND BODY INTEGRATED UNIT  .
   1. Disconnect the body integrated unit connector.
   2. Measure the resistance of the harness between MFD connector and body integrated unit connector.

   Connector & terminal 

   (i122) No. 19 - (B281) No. 17:

   (i122) No. 20 - (B281) No. 19:

   Is the resistance less than 10 Ω?

   Yes  : Go to  5.

   No  : Repair or replace the open circuit of harness.

5. CHECK BODY INTEGRATED UNIT  .

   Read the DTC of [Body Control] using the Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Are any DTCs displayed? (Current malfunction)

   Yes  : Perform the diagnosis according to displayed DTC. Ref. to BODY CONTROL (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST .

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