The Buzzer Does Not Sound: Wiring diagram

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

Fig 1: Buzzer Sound System Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DATA MONITOR. 

   Using Subaru Select Monitor, check [IGN SW]. Ref. to POWER REAR GATE (DIAGNOSTICS)>Data Monitor .

   Does the data value change according to the ignition switch ON/OFF? (ON ←→ OFF)

   • Yes: Go to  4.
   • No: Go to 2. 
2. CHECK FUSE. 
   1. Turn the ignition switch to OFF.
   2. Check the fuse. Ref. to CHECK FUSE .

   Is the check result OK?

   • Yes: Go to 3. 
   • No: Replace the defective fuse. When the fuse is blown immediately, repair the short circuit.
3. CHECK HARNESS (POWER SUPPLY CIRCUIT). 
   1. Disconnect the PRG CM connector.
   2. Turn the ignition switch to ON.
   3. Measure the voltage between PRG CM connector and chassis ground.

      Connector & terminal 

      (R422) No. 10 (+) - Chassis ground (-):

   Is the voltage 10 V or more and less than 16 V, when the ignition switch is ON?

   • Yes: Go to 4. 
   • No: Repair or replace the open circuit of harness.
4. CHECK FUNCTION. 
   1. Connect the PRG CM connector. Ref. to INSTALLATION .
   2. Turn the ignition switch to ON.
   3. Fully close PRG.
   4. Turn the memory height SW to OFF.
   5. Perform the auto-open operation of PRG.
   6. Reverse PRG three times during the auto-open operation so that the door free condition can be achieved.

   Does the buzzer sound, when PRG operation starts, or when the door free condition is achieved?

   • Yes: If the buzzer sounds when operation starts, the system is normal. If the buzzer sounds when the door free condition is achieved, Go to 5. 
   • No: Go to  6.
5. CHECK DATA MONITOR. 

   Using Subaru Select Monitor, check [Answer-Back Buzzer Information]. Ref. to POWER REAR GATE (DIAGNOSTICS)>Data Monitor .

   Is the data value displayed as OFF?

   • Yes: Currently, the system is normal. A temporary poor contact may be a possible cause. Therefore, check the harness connector.
   • No: Go to 6. 
6. CHECK DATA MONITOR. 
   1. Using Subaru Select Monitor, check [BUZZER]. Ref. to POWER REAR GATE (DIAGNOSTICS)>Data Monitor .
   2. Fully close the rear gate.
   3. Operate PRG to open.

   Is the change of ON ←→ OFF detected during the auto-open operation?

   • Yes: Go to 7. 
   • No: Replace the PRG CM. Ref. to REMOVAL .
7. CHECK HARNESS (OPEN CIRCUIT). 
   1. Disconnect the PRG CM connector.
   2. Disconnect the buzzer connector.
   3. Measure the resistance between PRG CM connector and buzzer connector.

      Connector & terminal 

      (R422) No. 12 - (D152) No. 1:

   Is the resistance less than 10 Ω?

   • Yes: Go to 8. 
   • No: Repair or replace the open circuit of harness.
8. CHECK HARNESS (GROUND SHORT CIRCUIT). 

   Measure the resistance between PRG CM connector and chassis ground.

   Connector & terminal 

   (R422) No. 12 - Chassis ground:

   Is the resistance 1 MΩ or more?

   • Yes: Go to 9. 
   • No: Repair or replace the short circuit of the harness.
9. CHECK HARNESS (OPEN CIRCUIT). 

   Measure the resistance between PRG CM connector and chassis ground.

   Connector & terminal 

   (D152) No. 2 - Chassis ground:

   Is the resistance less than 10 Ω?

   • Yes: Go to 10. 
   • No: Repair or replace the open circuit of harness.
10. CHECK PRG CM. 
    1. Connect the PRG CM connector only.
    2. Perform the step 4 operation.
    3. Measure the voltage between the buzzer connector and chassis ground.

       Connector & terminal 

       (D152) No. 1 (+) - Chassis ground (-):

    Is the following change measured, when PRG operation starts, or when the door free condition is achieved?

    Voltage: 10.5 V or more, less than 16 V

    DUTY: 50%

    • Yes: Replace the buzzer. Ref. to REMOVAL .
    • No: Replace the PRG CM. Ref. to REMOVAL .