DTC B2523 Half Stop Solenoid Failure: Wiring diagram

Power rear gate system Ref. to WIRING SYSTEM>Power Rear Gate System>WIRING DIAGRAM .

Fig 1: Half Stop Solenoid Failure System Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DTC. 
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor, read DTC of PRG CM. Ref. to POWER REAR GATE (DIAGNOSTICS)>Diagnostic Trouble Code (DTC) .

   Is DTC B2523 displayed? (Current malfunction)

   • Yes: Go to 2. 
   • No: Go to  3.
2. CHECK DTC. 
   1. Turn the ignition switch to OFF.
   2. Turn the ignition switch to ON.
   3. Using the Subaru Select Monitor, read DTC of PRG CM. Ref. to POWER REAR GATE (DIAGNOSTICS)>Diagnostic Trouble Code (DTC) .

   Is DTC B2523 displayed? (Current malfunction)

   • Yes: Go to  4.
   • No: Go to 3. 
3. CHECK CONNECTOR. 
   1. Turn the ignition switch to OFF.
   2. Disconnect the PRG CM connector.
   3. Check for poor contact of connector.

   Is the check result OK?

   • Yes: A temporary change of voltage occurred.
   • No: Repair or replace the poor contact of connector.
4. CHECK HARNESS (POWER SUPPLY CIRCUIT). 
   1. Turn the ignition switch to OFF.
   2. Disconnect the PRG CM connector.
   3. Measure the voltage between PRG CM connector and chassis ground.

      Connector & terminal 

      (R422) No. 6 (+) - Chassis ground (-):

   Is the voltage 10.5 V or more and less than 16 V?

   • Yes: Go to 5. 
   • No: Refer to step 4 and subsequent procedures for DTC B2500, and check the power supply circuit. Ref. to POWER REAR GATE (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2500 BATTERY POWER SUPPLY .
5. CHECK DATA MONITOR. 
   1. Connect the PRG CM connector.
   2. Using Subaru Select Monitor, check [HALF STOP SOL (Lock)], [HALF STOP SOL (Cancel)] and [HALF STOP SOL POS SW]. Ref. to POWER REAR GATE (DIAGNOSTICS)>Data Monitor .
   3. During the auto-open operation, tap any of the keyless rear gate SW, PRG driver's SW, PRG opener button, or PRG inner SW to stop the operation in a half-way position. Tap SW to operate the auto-close, and then check the data.
      CAUTION: ON output for lock and cancellation requires extremely short time (approx. 0.4 seconds). To check, limit the number of the display items on the Subaru Select Monitor to three. When the display items are too many, changes in the output signals will not be reflected.

   Are the following changes detected?

   • At R/G stop

     Solenoid lock output, OFF → ON → OFF

     Solenoid position detection SW, OFF → ON

   • At R/G re-operation

     Solenoid cancellation output, OFF → ON → OFF

     Solenoid position detection SW, ON → OFF

   • Yes: Go to 6. 
   • No: Replace the PRG CM. Ref. to REMOVAL .
6. CHECK HARNESS (OPEN CIRCUIT). 
   1. Turn the ignition switch to OFF.
   2. Disconnect the PRG CM connector.
   3. Disconnect the PRG DU connector.
   4. Measure the resistance between PRG CM connector and PRG DU.

      Connector & terminal 

      (R422) No. 16 - (R421) No. 9:

      (R422) No. 4 - (R421) No. 10:

      (R422) No. 6 - (R421) No. 2:

   Is the resistance less than 10 Ω?

   • Yes: Go to 7. 
   • No: Repair or replace the open circuit of harness.
7. CHECK HARNESS (GROUND SHORT CIRCUIT). 

   Measure the resistance between PRG CM connector and chassis ground.

   Connector & terminal 

   (R422) No. 16 - Chassis ground:

   (R422) No. 4 - Chassis ground:

   (R422) No. 6 - Chassis ground:

   Is the resistance 1 MΩ or more?

   • Yes: Go to 8. 
   • No: Repair or replace the short circuit of the harness.
8. CHECK HARNESS (SHORT CIRCUIT TO POWER SUPPLY). 

   Measure the voltage between PRG CM connector and chassis ground.

   Connector & terminal 

   (R422) No. 16 (+) - Chassis ground (-):

   (R422) No. 4 (+) - Chassis ground (-):

   (R422) No. 6 (+) - Chassis ground (-):

   Is the voltage less than 1 V?

   • Yes: Go to 9. 
   • No: Repair or replace the short circuit of the harness.
9. CHECK PRG DU. 
   1. Connect the PRG DU connector only.
   2. Measure the resistance between PRG CM connectors.

      Connector & terminal 

      (R422) No. 16 - (R422) No. 6:

      (R422) No. 4 - (R422) No. 6:

   Is the resistance less than 10 Ω?

   • Yes: Go to 10. 
   • No: Replace the PRG DU. Ref. to REMOVAL .
10. CHECK CONNECTOR. 
    1. Disconnect the PRG CM connector.
    2. Disconnect the PRG DU connector.
    3. Check for poor contact of connector.

    Is the check result OK?

    • Yes: Replace the PRG CM. Ref. to REMOVAL .
    • No: Repair or replace the poor contact of connector.