Circuit figure

Fig 1: Pattern Select Switch System Circuit Diagram

Courtesy of SUBARU OF AMERICA, INC.

Inspection steps

1. Reading of SSM4 data
   1. Connect the SSM4 to the DLC3.
   2. Turn the ignition switch to ON.
   3. Use SSM4 to display the [Data monitor] screen according to the screen display and check the computer data recorded when the SPORT mode switch is operated.
   SSM4 SCREEN DESCRIPTION
   
   

   Item name [Symbol]	Item description Display range	Normal value	Remarks
   SPORT SW	Indicating pattern select (SPORT) switch ON←→OFF	Pattern select (SPORT) switch OFF→ON OFF→ON	-

   NG: go to step  3.

   OK: Go to next step.

2. Reading of SSM4 data
   1. Connect the SSM4 to the DLC3.
   2. Turn the ignition switch to ON.
   3. Use SSM4 to display the [Data monitor] screen according to the screen display and check the computer data recorded when the SNOW mode switch is operated.
   SSM4 SCREEN DESCRIPTION
   
   

   Item name [Symbol]	Item description Display range	Normal value	Remarks
   SNOW SW	Indicating pattern select (SNOW) switch ON←→OFF	Pattern select (SNOW) switch OFF→ON OFF→ON	-

   NG: go to step  6.

   OK: Go to the symptom table (Refer to Symptom table )

3. Check of pattern select switch ASSY unit
   1. Disconnect the connector D35 of pattern select switch ASSY.
   2. Check the pattern select switch ASSY (SPORT switch) unit. (Refer to Unit inspection )

   NG: Replacement of pattern select switch ASSY (refer to Pattern select switch ASSY )

   OK: Go to next step.

4. Check wiring harness and connector (pattern select switch - transmission control computer - chassis ground)
   1. Disconnect the connector A19 of the transmission control computer.
   2. Disconnect the connector D35 of pattern select switch ASSY.
   3. Measure the resistance between the terminals.
      RESISTANCE SPECIFICATIONS
      
      

      Inspection terminals	Inspection conditions	Standard value
      A19-13 (SPORT) - D35-4 (SPORT)	Always	Less than 1 Ω
      D35-8 - chassis ground	Always	Less than 1 Ω
      A19-13 (SPORT) - chassis ground	Always	10 k Ωor more

   4. Connect the connector A19 of the transmission control computer.
   5. Connect the connector D35 of the pattern select switch ASSY.

   NG: Repair or replacement of wiring harness or connector

   OK: Go to next step.

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

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

6. Check of pattern select switch ASSY unit
   1. Disconnect the connector D35 of pattern select switch ASSY.
   2. Check the pattern select switch ASSY (SNOW switch) unit. (Refer to Unit inspection )

   NG: Replacement of pattern select switch ASSY (refer to Pattern select switch ASSY )

   OK: Go to next step.

7. Wiring harness or connector check (pattern select switch - transmission control computer - chassis ground)
   1. Disconnect the connector A19 of the transmission control computer.
   2. Disconnect the connector D35 of pattern select switch ASSY.
   3. Measure the resistance between the terminals.
      RESISTANCE SPECIFICATIONS
      
      

      Inspection terminals	Inspection conditions	Standard value
      A19-24 (SNOW) - D35-6 (SNOW)	Always	Less than 1 Ω
      D35-8 - chassis ground	Always	Less than 1 Ω
      A19-24 (SNOW) - chassis ground	Always	10 k Ωor more

   4. Connect the connector A19 of the transmission control computer.
   5. Connect the connector D35 of the pattern select switch ASSY.

   NG: Repair or replacement of wiring harness or connector

   OK: Go to next step.

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

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