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Home >> Subaru >> 2013 >> BRZ Limited, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Entry Start System Entry System (Keyless Entry)) >> Entry & Start System (Entry Function) >> Neither Smart Lock Nor Smart Unlock Operation Works From Any Of The Doors (But The Wireless Function Works) >> Inspection steps

Inspection steps

WARNING: This page is about a different car, the 2018 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
  • Some functions of the entry & start system (entry function) use the LIN communication system and the CAN communication system. Inspect the communication function by referring to "How to troubleshoot" (refer to HOW TO PROCEED WITH TROUBLESHOOTING ). Confirm that the communication system is functioning properly before proceeding to repair the entry & start system (entry function).
  • Before replacing the collation ECM (smart key ECM ASSY), refer to "entry & start system (entry function)". (Refer to ENTRY & START SYSTEM (ENTRY FUNCTION) )
  • After the repair work is complete, perform the "DTC output check operation" to confirm that the DTC is not output again.
  • Check if the electrical key transmitter SUB-ASSY is inside the vehicle.
  • Even if you want to check the entry lock operation several times, the setting does not allow you to perform the lock operation more than twice in a row. To perform the entry lock operation more than twice, you have to unlock a door once (you may use any type of unlock operation). This limitation applies only to the entry lock operation. A wireless lock or other types of lock operations can be performed any number of times without any limitations.
  1. Check the power door lock operation.
    1. Operate the door control switch on the power window regulator master switch ASSY, and check if the door locks or unlocks properly according to the switch operation you have performed. (Refer to OPERATION CHECK )

      Criteria: The door lock operation is performed properly.

      OK: Go to next step

      NG: Go to "Power door lock control system" ("Symptom table").

  2. Read numerical values using the SSM4 ([Auto Entry Cancel SW]).
    1. Connect the SSM4 to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn on the SSM4.
    4. Enter the following menus: [Keyless Access(Collation ECM)] →[Data monitor]
    5. Based on the contents of the SSM4 display, read the [Data monitor].
      RANGE DESCRIPTION - ENTRY AND START

      Tester display Measurement items/range Normal condition Notes for diagnosis
      [Smart Cancel] Entry cancel function setting/[OFF] or [ON] Mode status indication OFF: Entry & start system is not cancelled. ON: Entry & start system is cancelled. The entry cancel function is disabled by default. If the customer wishes to cancel the entry & start system function (lock/unlock doors holding the key, etc.), you can disable this function by using the customize function (refer to CUSTOMIZE PARAMETERS ).
      RESULT DESCRIPTION

      Result Go to
      The cancel setting for the entry function is disabled. A
      The cancel setting for the entry function is enabled. B
      1. Go to next step
      2. Disable the entry key cancel function. (Refer to CUSTOMIZE PARAMETERS )
  3. Checking radio wave environment
    1. Move the electrical key transmitter SUB-ASSY according to the instructions provided below to inspect the operation. (Refer to OPERATION CHECK )
      NOTE:
      • Try moving the electrical key transmitter SUB-ASSY closer to the door outer handle ASSY or the electrical key antenna, so that it is less likely to be affected by interference from external radio waves. In this way, you can identify if the problem is caused by external radio waves or not.
      • Although the wireless function and the entry function transmits the same radio wave, the wave logic differs between the two. Due to this, only one of the two functions may be affected by interference from external radio waves, while the other remains unaffected.
    2. Move the electrical key transmitter SUB-ASSY towards the driver's door outer handle ASSY and check how the entry lock and unlock operations work on the driver's door.
      CAUTION: If the key is within 0.2 m of the door outer handle ASSY, communication is not possible.
      G12589304Courtesy of SUBARU OF AMERICA, INC.
    3. Move the electrical key transmitter SUB-ASSY towards the passenger's door outer handle ASSY and check how the entry lock and unlock operations work on the passenger's door.
      CAUTION: If the key is within 0.2 m of the door outer handle ASSY, communication is not possible.
      G12589305Courtesy of SUBARU OF AMERICA, INC.
    4. Move the electrical key transmitter SUB-ASSY toward the electrical key antenna (trunk exterior antenna) and check the entry trunk open function.
      CAUTION: If the key is within 0.2m (0.656 feet) of the rear bumper, communication is not possible.
      G12589306Courtesy of SUBARU OF AMERICA, INC.
      NOTE:
      • If this inspection reveals that the problem occurs in certain locations or during certain periods of time, the problem is likely due to interference from external radio waves. In addition, installing an additional component to the vehicle makes the vehicle more susceptible to interference from external radio waves. If such components are found, remove them, and then proceed to check the operation.
      • If interference from external radio waves is suspected, inquire the customer if the problem occurs in certain locations.
      • Move the vehicle to another location and perform the following procedure to check if the problem improves.
      • If a tool for checking radio waves such as a signal-strength meter is available, take measurements in the LF band (which is used by the vehicle antenna to create a detection area) and the RF band (which is used by the electrical key transmitter SUB-ASSY for signal transmission) in the vicinity of the vehicle to check where the radio waves might be present.
      RESULT DESCRIPTION

      Result Go to
      All operation checks fail. A
      All operation checks pass. B
      One of the operation checks passes. C

      OK: Go to next step

      B: Interference from external radio waves

      C: Proceed to check other problems (check each door using the symptom table) (refer to PROBLEM SYMPTOMS TABLE ).

  4. Perform the keyless access system check.
    1. Perform keyless access system check for the following antennas. (Refer to OPERATION CHECK )
      1. Check the electrical key antenna (driver's door):
        G12589307Courtesy of SUBARU OF AMERICA, INC.

        Check if the wireless door lock buzzer beeps when the electrical key transmitter SUB-ASSY is within 0.7 - 1 m of the front door outer handle ASSY (driver's door).

      2. Check the electrical key antenna (passenger's door):
        G12589308Courtesy of SUBARU OF AMERICA, INC.

        Check if the wireless door lock buzzer beeps when the electrical key transmitter SUB-ASSY is within 0.7 - 1 m of the front door outer handle ASSY (passenger's door).

      3. Check the indoor electrical key antenna no. 1 (front floor).
        G12589309Courtesy of SUBARU OF AMERICA, INC.

        Check if the wireless door lock buzzer beeps when the electrical key transmitter SUB-ASSY is located at the inspection points.

      4. Check the indoor electrical key antenna no. 2 (rear floor):
        G12589310Courtesy of SUBARU OF AMERICA, INC.

        Check if the wireless door lock buzzer beeps when the electrical key transmitter SUB-ASSY is located at the inspection points.

      5. Check the electrical key antenna (trunk exterior antenna).
        G12589311Courtesy of SUBARU OF AMERICA, INC.

        Check if the wireless door lock buzzer beeps when the electrical key transmitter SUB-ASSY is within 0.7 - 1 m of the electrical key antenna (trunk exterior antenna).

        Criteria: The wireless door lock buzzer beeps.

        RESULT DESCRIPTION

        Result Go to
        Failed all diagnostic mode unit inspections. A
        Failed some diagnostic mode unit inspections (door). B
        Failed some diagnostic mode unit inspections (indoor). C
        Failed some diagnostic mode unit inspections (outdoor). D
        Passed all diagnostic mode unit inspections. E

        OK: Go to next step

        B: Proceed to check other problems (check each door using the symptom table) (refer to PROBLEM SYMPTOMS TABLE ).

        C: Proceed to check other problems ("ROOM OSCILLATOR DOES NOT RECOGNIZE KEY") (refer to INTERIOR COLLATION IS NG ).

        D: Proceed to check other problems ("BACK DOOR ENTRY LOCK AND UNLOCK FUNCTIONS DO NOT OPERATE") (refer to SMART TRUNK OPEN OPERATION DOES NOT WORK (WHEN THE TRANSMITTER IS LOCATED OUTSIDE TRUNK) ).

        E: Replacement of the collation ECM (smart key ECM ASSY)

  5. Inspect the electrical key transmitter SUB-ASSY unit.
    1. Check if other keys already registered to the vehicle can be used. Result
      Result Go to
      No other keys are registered to the vehicle. A
      Other keys are registered to the vehicle. B
      1. Go to next step
      2. Go to Step 7.
  6. Register a new electrical key transmitter SUB-ASSY.
    1. Register an electrical key transmitter SUB-ASSY. (Refer to the "Registration manual for immobilizer".)
  7. Check the electrical key transmitter SUB-ASSY (operation).
    1. Check if the entry function works properly. (Refer to OPERATION CHECK )

      Criteria: The entry function works properly.

      OK: Go to next step

      NG: Replacement of the collation ECM (smart key computer ASSY)

      END (electrical key transmitter SUB-ASSY malfunction)

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