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.

CAUTION: Use CHECK BOARD when measuring the TCM terminal voltage and resistance. After servicing or replacing faulty parts, perform the last step of the basic diagnostic procedure. Ref. to TRANSMISSION (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

Wiring diagram:

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

Courtesy of SUBARU OF AMERICA, INC.

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 5.
  
  No : Go to 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.
CHECK HARNESS .
1. Disconnect the inhibitor switch connector.
2. Measure the resistance between transmission connector and chassis ground.
  Connector & terminal
  
  (T15) No. 4 - Chassis ground:
  
  (T15) No. 5 - Chassis ground:
  
  (T15) No. 9 - Chassis ground:
  
  (T15) No. 10 - Chassis ground:
  
  Is each resistance 1 MΩ or more?
  
  Yes : Go to 4.
  
  No : Repair the short circuit of transmission harness.
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 (TR690)>INHIBITOR SWITCH .
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 (TR690)>TRANSMISSION CONTROL MODULE (TCM) .