Half-Stop Cannot Be Cancelled: Wiring diagram

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

Fig 1: Half-Stop Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK OPERATION SW. 

   Refer to "CHECK PRG DRIVER'S SW INPUT CIRCUIT", "CHECK PRG INNER SW INPUT CIRCUIT" and "OPERATION FROM KEYLESS/SMART MOBILE KEY IS NOT POSSIBLE" in "Diagnostics with Phenomenon", and check each operation SW. Ref. to POWER REAR GATE (DIAGNOSTICS)>Diagnostics with Phenomenon>INSPECTION>CHECK PRG DRIVER'S SW INPUT CIRCUIT . Ref. to POWER REAR GATE (DIAGNOSTICS)>Diagnostics with Phenomenon>INSPECTION>CHECK PRG INNER SW INPUT CIRCUIT . Ref. to POWER REAR GATE (DIAGNOSTICS)>Diagnostics with Phenomenon>INSPECTION>OPERATION FROM KEYLESS/SMART MOBILE KEY IS NOT POSSIBLE .

   Is the check result OK?

   • Yes: Go to 2. 
   • No: Perform the repair according to each diagnosis.
2. CHECK DATA MONITOR. 

   Using Subaru Select Monitor, check [HALF STOP SOL (Cancel)]. Ref. to POWER REAR GATE (DIAGNOSTICS)>Data Monitor .

   CAUTION: ON output for solenoid 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.

   Is the following output displayed, when PRG close-operation is performed with the operation SW? "OFF → ON → OFF"

   • Yes: Go to 3. 
   • No: Replace the PRG CM. Ref. to REMOVAL .
3. CHECK PRG CM. 

   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 4. 
   • 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 .
4. CHECK PRG CM. 

   Measure the voltage between PRG CM connector and chassis ground, using an oscilloscope.

   Connector & terminal 

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

   Fig 2: Measuring Voltage Between PRG CM Connector And Chassis Ground Using Oscilloscope

   Courtesy of SUBARU OF AMERICA, INC.

   Is the voltage less than 1 V for 0.4 seconds, when PRG close-operation is performed with the operation SW? (Reference: Waveform shown on the left)

   • Yes: Go to 5. 
   • No: Replace the PRG CM. Ref. to REMOVAL .
5. CHECK PRG CM. 

   Measure the voltage between PRG CM connector and chassis ground.

   Connector & terminal 

   (R422) No. 16 - Chassis ground:

   Is it less than 1 V?

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

      Connector & terminal 

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

      (R422) No. 4 - (R421) No. 9:

   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. 6 - Chassis ground:

   (R422) No. 16 - 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. 4 (+) - 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 CONNECTOR. 
   1. Turn the ignition switch to OFF.
   2. Check for poor contact of connector.

   Is the check result OK?

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