PRG Inner SW Does Not Function

Wiring diagram: 

Power rear gate system Ref. to WIRING SYSTEM>POWER REAR GATE SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DATA MONITOR. 

   Using Subaru Select Monitor, check [R/G inner SW]. Ref. to POWER REAR GATE (DIAGNOSTICS)>DATA MONITOR .

   Does the display switch between OFF ↔ ON according to PRG inner SW operation?

   Yes:  Input circuit is normal.

   No  : Go to  2.

2. CHECK HARNESS (OPEN CIRCUIT). 
   1. Disconnect the Power rear gate Control Module connector in the order of (R423) → (R422).
   2. Disconnect the PRG inner SW connector.
   3. Measure the resistance between Power rear gate Control Module connector and PRG inner SW connector.

      Connector and terminal 

      (R422) No. 6 - (D154) No. 2:

   Is the resistance less than 10 Ω?

   Yes  : Go to  3.

   No  : Repair or replace the open circuit of harness.

3. CHECK HARNESS (GROUND SHORT CIRCUIT). 

   Measure the resistance between Power rear gate Control Module connector and chassis ground.

   Connector and terminal 

   (R422) No. 6 - Chassis ground:

   Is the resistance 1 MΩ or more?

   Yes  : Go to  4.

   No  : Repair or replace the short circuit of the harness.

4. CHECK HARNESS (OPEN CIRCUIT). 

   Measure the resistance between PRG inner SW and chassis ground.

   Connector and terminal 

   (D154) No. 1 - Chassis ground:

   Is the resistance less than 10 Ω?

   Yes  : Go to  5.

   No  : Repair or replace the open circuit of harness.

5. CHECK PRG INNER SW. 

   Measure the resistance between switch terminals.

   Terminals 

   No. 1 - No. 2:

   Is the resistance 1 MΩ or more at OFF, and less than 1 Ω at ON?

   Yes  : Go to  6.

   No  : Replace the PRG inner SW. Ref. to POWER REAR GATE SYSTEM>MEMORY HEIGHT SWITCH .

6. CHECK CONNECTOR. 

   Is there poor contact of connector?

   Yes:  Repair or replace the poor contact of connector.

   No  : Replace Power rear gate Control Module. Ref. to POWER REAR GATE SYSTEM>POWER REAR GATE CONTROL MODULE .