DTC P0951: Auto Shift Manual Control Circuit Range/Performance: Notes

1. - 

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

Manual mode cannot be set.

Wiring diagram: 

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

Courtesy of SUBARU OF AMERICA, INC.

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

   Connector & terminal 

   (i44) No. 8 - Chassis ground:

   Is the resistance less than 1 Ω?

   Yes  : Go to  2 .

   No  : Repair the open circuit of harness.

2. CHECK MANUAL MODE SWITCH  .

   Measure the resistance between manual mode switch terminals.

   Connector & terminal 

   No. 7 - No. 8:

   Is the resistance 1 MΩ or more?

   Yes  : Go to  3 .

   No  : Replace the select lever assembly. Ref. to CONTROL SYSTEMS>SELECT LEVER .

3. CHECK MANUAL MODE SWITCH  .
   1. Shift the select lever to manual mode.
   2. Measure the resistance between manual mode switch terminals.

   Connector & terminal 

   No. 7 - No. 8:

   Is the resistance less than 1 Ω?

   Yes  : Go to  4 .

   No  : Replace the select lever assembly. Ref. to CONTROL SYSTEMS>SELECT LEVER .

4. CHECK HARNESS  .
   1. Disconnect the TCM connector.
   2. Measure the resistance between TCM connector and manual mode switch connector.

   Connector & terminal 

   (T10) No. 20 - (i44) No. 7:

   Is the resistance less than 1 Ω?

   Yes  : Go to  5 .

   No  : Repair the open circuit of harness or poor contact of connector.

5. CHECK HARNESS  .

   Measure the resistance between manual mode switch connector and chassis ground.

   Connector & terminal 

   (i44) No. 7 - Chassis ground:

   Is the resistance 1 MΩ or more?

   Yes  : Go to  6 .

   No  : Repair the short circuit of harness.

6. CHECK INPUT SIGNAL FOR TCM  .
   1. Connect all connectors.
   2. Turn the ignition switch to ON.
   3. Set the select lever to "D" range.
   4. Read the data of [Tiptronic Mode Switch] using Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA MONITOR .

   Does [Tiptronic Mode Switch] display "ON" with select lever in manual mode, and "OFF" with select lever in other than manual mode?

   Yes  : Current condition is normal.

   No  : Go to  7 .

7. CHECK FOR POOR CONTACT  .

   Is there poor contact of the manual mode switch circuit?

   Yes  : Repair the poor contact.

   No  : Replace the TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>TRANSMISSION CONTROL MODULE (TCM) .