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DTC P0708 At Range Switch Not Inputted: Wiring Diagram

WARNING: This page is about a different variant/trim than selected.
Fig 1: Inhibitor Switch Wiring Diagram (DTC P0708)
G06651855Courtesy of SUBARU OF AMERICA, INC.
Step Check Yes No
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, R, N, D range" using the Subaru Select Monitor.
 Is the display of the corresponding range "ON"? Go to step 7  . Go to step 2  .
2 CHECK HARNESS. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the TCM and transmission connectors.
  3. Measure the resistance of harness between TCM connector and transmission connector.

    Connector & terminal 

    (B54) No. 5 - (B12) No. 3: 

    (B54) No. 18 - (B12) No. 2: 

    (B54) No. 9 - (B12) No. 1: 

    (B54) No. 22 - (B12) No. 8: 

 Is each resistance less than 1 Ω? Go to step 3  . Repair the open circuit of harness.
3 CHECK HARNESS. 
Measure the resistance of harness between transmission connector and transmission ground.
Connector & terminal 
(B12) No. 4 - Transmission ground: 		 Is the resistance less than 1 Ω? Go to step 4  . Repair the open circuit of harness.
4 CHECK HARNESS. 
  1. Disconnect the inhibitor switch connector.
  2. Measure the resistance between transmission connector and inhibitor switch connector.

    Connector & terminal 

    (T3) No. 3 - (T7) No. 2: 

    (T3) No. 2 - (T7) No. 5: 

    (T3) No. 1 - (T7) No. 3: 

    (T3) No. 8 - (T7) No. 4: 

    (T3) No. 4 - (T7) No. 1: 

 Is each resistance less than 1 Ω? Go to step 5  . Repair the open circuit of harness.
5 CHECK INHIBITOR SWITCH. 
Move the select lever to each range, and measure the resistance between inhibitor switch connector terminals
Connector & terminal 
(T7) No. 2 - (T7) No. 1: 
(T7) No. 5 - (T7) No. 1: 
(T7) No. 3 - (T7) No. 1: 
(T7) No. 4 - (T7) No. 1: 		 Is the resistance of the corresponding range less than 1 MΩ? Go to step 6  . Replace the inhibitor switch. Refer to INHIBITOR SWITCH .
6 CHECK HARNESS. 
  1. Turn the ignition switch to ON.
  2. Measure the voltage between each connector and chassis ground.

    Connector & terminal 

    Transmission connector (B12 side) 

    (B12) No. 3 (+) - Chassis ground (-): 

    (B12) No. 2 (+) - Chassis ground (-): 

    (B12) No. 1 (+) - Chassis ground (-): 

    (B12) No. 8 (+) - Chassis ground (-): 

    (B12) No. 4 (+) - Chassis ground (-): 

    Transmission connector (T7 side) 

    (T7) No. 2 (+) - Chassis ground (-): 

    (T7) No. 5 (+) - Chassis ground (-): 

    (T7) No. 3 (+) - Chassis ground (-): 

    (T7) No. 4 (+) - Chassis ground (-): 

    (T7) No. 1 (+) - Chassis ground (-): 

 Is each voltage less than 1 V? Go to step 7  . Repair the harness which outputs 1 V or more.
7 CHECK FOR POOR CONTACT.  Is there poor contact between TCM, inhibitor switch, transmission ground? Repair the poor contact. Check the TCM.
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