Circuit figure

Fig 1: Instrument Panel Junction Block ASSY - Circuit Diagram

Courtesy of SUBARU OF AMERICA, INC.

Inspection steps

1. Clearing diagnostic code
   1. Clear the diagnostic code using the SSM4. (Refer to Checking/clearing diagnostic codes )

      Next

2. DTC check
   1. Use the SSM4 to confirm that diagnostic code B1014 is not being output. (Refer to Checking/clearing diagnostic codes )
      RESULT REFERENCE
      
      

      Result	Go to
      If the diagnostic code is being output	A
      If the diagnostic code is not output	B

      B: Go to "How to simulate trouble phenomenon" (Refer to Procedures for malfunction phenomenon simulation )

      A: Go to Next Step.

3. Inspection of the wiring harness and connector (Power supply voltage)
   NOTE: For inspection procedures and precautions, refer to Inspection procedures for electrical circuits and how to perform .
   1. Disconnect the instrument panel junction block ASSY connectors 3A and 3E.
   2. Measure the voltage between the terminals.
      VOLTAGE SPECIFICATION
      
      

      Inspection terminals	Inspection conditions	Standard value
      3A-20 - Chassis ground	ACC ON	11 to 14 V
      3E-1 - Chassis ground	Always	11 to 14 V

      Fig 2: Identifying Instrument Panel Junction Block Assy Connector Terminals

      Courtesy of SUBARU OF AMERICA, INC.

      NG: Repair or replacement of wiring harness or connector

      OK: Go to Next Step.

4. Inspection of the wiring harness and connector (Ground) (Refer to DTC B1014 ACC power failure )

   NG: Repair or replacement of wiring harness or connector

   OK: Go to Next Step.

5. Inspection of the instrument panel junction block ASSY itself
   1. Remove the instrument panel junction block ASSY. (Refer to Removal )
   2. Remove the main body ECM (network gateway computer) from the instrument panel junction block ASSY.
      Fig 3: Identifying Instrument Panel Junction Block Assy Connector Terminals

      Courtesy of SUBARU OF AMERICA, INC.
   3. Measure the resistance between the terminals.
      RESISTANCE SPECIFICATION
      
      

      Inspection terminals	Inspection conditions	Standard value
      3E-1 - MB-9 (ACC)	When battery voltage is not applied between terminals 3A-20 and 3A-12.	10 kΩ or more
      3E-1 - MB-9 (ACC)	When battery voltage is applied between terminals 3A-20 and 3A-12.	Less than 1 Ω
      3B-18 - MB-11 (GND)	Always	Less than 1 Ω

      NG: Replacement of the instrument panel junction block ASSY (Refer to Removal )

      OK: Replacement of the main body ECM (network gateway computer) (Refer to Removal )