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: 

CVT control system Ref. to WIRING SYSTEM>CVT CONTROL SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

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

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

   Yes:  Go to  4.

   No:  Go to  2.

2. CHECK HARNESS  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the TCM connector.
   3. Disconnect the inhibitor switch connector.
   4. Measure the resistance between TCM connector and chassis ground.

      Connector & terminal 

      (T10) No. 38 - Chassis ground:

      (T10) No. 37 - Chassis ground:

      (T10) No. 36 - Chassis ground:

      (T10) No. 35 - Chassis ground:

   Is each resistance 1 MΩ or more?

   Yes:  Go to  3.

   No:  Repair the short circuit of transmission harness.

3. CHECK INHIBITOR SWITCH  .

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

   Connector & terminal 

   No. 6 - No. 3:

   No. 7 - No. 3:

   No. 9 - No. 3:

   No. 8 - No. 3:

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

   Yes:  Go to  4.

   No:  Replace the inhibitor switch. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>INHIBITOR SWITCH .

4. 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) .