Circuit figure

Fig 1: Sports Sequential Shift Switch System Circuit Diagram

Courtesy of SUBARU OF AMERICA, INC.

Inspection steps

1. Check of transmission control switch unit
   1. Disconnect the connector D28 of the transmission control switch.
   2. Check the transmission control switch unit. (Refer to Unit inspection )

   NG: Replacement of transmission control switch (refer to Removal )

   OK: Go to next step.

2. Check wiring harness and connector (transmission control switch - transmission control computer)
   1. Disconnect the connector A19 of the transmission control computer ASSY.
   2. Measure the resistance of the vehicle side connector. (For terminal arrangement, refer to ECM terminal arrangement .)
      RESISTANCE SPECIFICATIONS
      
      

      Inspection terminals	Inspection conditions	Standard value
      A19-2 (SFTU) - chassis ground	When select lever is in M position and shifted to "+"	Less than 1 Ω
      A19-1 (SFTD) - chassis ground	When select lever is in M position and shifted to "-"	Less than 1 Ω
      A19-2 (SFTU) - chassis ground	Neutral position (M position)	10 k Ωor more
      A19-1 (SFTD) - chassis ground	Neutral position (M position)	10 k Ωor more

   3. Connect the connector A19 of the transmission control computer ASSY.

   NG: Repair or replacement of wiring harness or connector

   OK: Go to next step.

3. Replacement of transmission control computer ASSY
   1. Replace the transmission control computer ASSY. (Refer to Transmission control computer ASSY )

   Next: AT unit correction (refer to Inspection for problems that do not normally occur )