DTC P0705 Transmission Range Sensor "A" Circuit (PRNDL Input): Notes

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

• Shift characteristics are erroneous.
• The range position of the select lever and the position of shift indicator display do not match.

Wiring diagram: 

• Non-turbo model

  CVT control system Ref. to WIRING SYSTEM>CVT Control System>WIRING DIAGRAM>NON-TURBO MODEL .

  Fig 1: Transmission Range Sensor (A) Circuit System Wiring Diagram (Non-Turbo Model)

  Courtesy of SUBARU OF AMERICA, INC.
• Turbo model

  CVT control system Ref. to WIRING SYSTEM>CVT Control System>WIRING DIAGRAM>TURBO MODEL .

1. CHECK INPUT SIGNAL FOR TCM. 
   1. Turn the ignition switch to ON.
   2. Move the select lever to each range, read the data of [P Range], [R Range Signal], [N Range] and [D Range Signal] using the Subaru Select Monitor.

   Is display "OFF" for the range other than corresponding range?

   • Yes  : Go to  5.
   • No  : Go to 2. 
2. CHECK HARNESS. 
   1. Turn the ignition switch to OFF.
   2. Disconnect the TCM connector.
   3. Disconnect the transmission connector.
   4. Measure the resistance between TCM connector and chassis ground.

      Connector & terminal 

      (B54) No. 38 - Chassis ground:

      (B54) No. 37 - Chassis ground:

      (B54) No. 36 - Chassis ground:

      (B54) No. 35 - Chassis ground:

   Is each resistance 1 MΩ or more?

   • Yes  : Go to 3. 
   • No  : Repair the short circuit of body harness.
3. CHECK HARNESS. 
   1. Disconnect the inhibitor switch connector.
   2. Measure the resistance between transmission connector and chassis ground.

      Connector & terminal 

      Non-turbo model 

      (T3) No. 1 - Chassis ground:

      (T3) No. 2 - Chassis ground:

      (T3) No. 3 - Chassis ground:

      (T3) No. 4 - Chassis ground:

      Turbo model 

      (T3) No. 3 - Chassis ground:

      (T3) No. 2 - Chassis ground:

      (T3) No. 1 - Chassis ground:

      (T3) No. 8 - Chassis ground:

   Is each resistance 1 MΩ or more?

   • Yes  : Go to 4. 
   • No  : Repair the short circuit of transmission harness.
4. CHECK INHIBITOR SWITCH. 

   Move the select lever to each range, and measure the resistance between inhibitor switch terminals.

   Terminals 

   No. 2 - No. 1:

   No. 5 - No. 1:

   No. 3 - No. 1:

   No. 4 - No. 1:

   Is the resistance other than corresponding range 1 MΩ or more?

   • Yes  : Go to 5. 
   • No  : Replace the inhibitor switch. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>Inhibitor Switch . Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR690)>Inhibitor Switch .
5. CHECK FOR POOR CONTACT. 

   Is there poor contact between TCM, inhibitor switch, transmission ground?

   • Yes  : Repair the poor contact.
   • No  : Replace the TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>Transmission Control Module (TCM) . Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR690)>Transmission Control Module (TCM) .