Subaru Legacy BN/BS (2015-2019) Service Manual: Caution

• Do not use the electrical test equipment on all airbag system wiring harnesses and connectors.

• Be careful not to damage the wiring harness of the airbag system when servicing the keyless access with push button start system.

• Using the function setting (ECM customizing), check that the keyless access system is not OFF. Function Setting (Customize) > OPERATION

• The dark current is approx. 400 mA if there is communication between the vehicle and access key.

• The dark current is approx. 40 mA if there is no communication between the vehicle and access key.*

(1) When carrying the access key with all doors locked by keyless lock operation, check that when the touch sensor (unlock) built in to the back side surface of door outer handle of front door is touched, the driver’s door will unlock (when touched on the driver’s side) or all doors will unlock (when touched on the passenger’s side) and the answer-back function operates (hazard light blinks twice, access buzzer sounds twice).

(2) In the keyless access door unlock detection area, hold the access key at the same height as the outer handle (approx. 80 cm from the ground) and in the direction shown in the figure, and check that the vehicle becomes unlock mode [access key LED (red) blinks] at 40 to 80 cm from the vehicle.

NOTE:

(1) When carrying the access key outside of the vehicle with all doors closed and unlocked, check that when the touch sensor (lock) on the surface of door outer handle of front door is touched, all doors will lock and the answer-back function operates (hazard light blinks once, access buzzer sounds once).

CAUTION:

(2) To check the keyless access door lock operation range, hold the access key at a height of 10 cm under the bottom edge of the door glass (approx. 80 cm from the ground), point it in the direction shown in the figure at a distance of approx. 30 cm from the vehicle, and check that all doors lock and the answer-back function operates (hazard light blinks once, access buzzer sounds once) when you touch the touch sensor (lock).

(3) Check the passenger’s side door in the same manner.

NOTE:

(1) With the trunk closed, check that the trunk opens and the answer-back function operates (hazard light blinks twice, access buzzer sounds twice) when you press the trunk opener button while carrying the access key.

(2) To check the keyless access trunk open operation range, hold the access key behind and in the center of the vehicle at the same height as the trunk opener button (90 cm from the ground), point it in the direction shown in the figure at a distance of 40 to 80 cm from the vehicle, and check that the trunk opens and the answer-back function operates (hazard light blinks twice, access buzzer sounds twice) when the trunk opener button is pressed.

(1) With the rear gate locked, the all doors unlocks and the rear gate opens simultaneously and the answer-back function operates (hazard light blinks twice, external buzzer sounds twice) when you press the rear gate opener button while carrying the access key.

(2) To check the range for keyless access rear gate open operation, hold the access key behind and in the center of the vehicle at the same height as the rear gate opener button (90 cm from the ground), point it in the direction shown in the figure at a distance of 40 to 80 cm from the vehicle, and check that the all doors unlocks and the rear gate opens simultaneously and the answer-back function operates (hazard light blinks twice, external buzzer sounds twice) when the rear gate opener button is pressed.

(3) With the rear gate unlock, check that the all doors lock and the answer-back function operates (hazard light blinks once, external buzzer sounds once) when rear lock button is pressed while carrying the access key.

(1) With the ignition OFF, enter the vehicle while carrying the access key. Depress the brake pedal with the shift lever in the “P” range (except for MT model) or depress the clutch pedal (MT model), and check that the push button ignition switch indicator is illuminated in green, and check that the engine starts when you press the push button ignition switch.

(2) While carrying the access key, check that the status changes as follows each time you press the push button ignition switch without depressing the brake pedal (except for MT model) or clutch pedal (MT model): ‘Ignition OFF’ > ‘ACC ON’ > ‘Ignition ON’ > ‘Ignition OFF’. However on the model except for MT, if the shift lever is a range other than the “P” range and the push button ignition switch is pressed from ignition ON, then the status will not change to ignition OFF and instead will change to ACC ON.

(3) After the vehicle has stopped, press the push button ignition switch and ignition is turned OFF (engine stopped · all power supplies OFF). However on the model except for MT, if the shift lever is in a range other than the “P” range and the push button ignition switch is pressed with the vehicle stopped, then the power supply will not change to ignition OFF and instead will change to ACC ON. Check that the steering lock operates if the door is opened in the ignition OFF state. (However, except for MT model, the shift must be in the “P” range.)

(4) To check the range of the keyless access ignition operation, check that the engine can start when you set the access key at the check position on the seat in the direction indicated in the figure.

CAUTION:

NOTE:

Open one of the windows before performing this check in order to prevent the key from being locked inside the vehicle.

(1) With all doors closed and locked, and with the access key in the trunk room and the trunk closed, check that the access buzzer sounds (approx. 2 seconds). Also check that the trunk opens when you press the trunk opener button.

(2) To check the detection range of the lockout protection function with the access key in the trunk, position the access key in the direction shown in the figure, and check that the lockout protection function operates normally when you check the lockout protection function for the access key locked in the trunk.

CAUTION:

NOTE:

Open one of the windows before performing this check in order to prevent the key from being locked inside the vehicle.

(1) Position the access key on the driver’s or passenger’s seat.

(2) Close all doors. (with all doors unlocked)

(3) Check that the doors do not lock and the lockout protection buzzer (exterior) sounds for 2 seconds when you touch the touch sensor (lock) of either the driver’s or passenger’s door.

(1) After setting the keyless access cancel function, check that all keyless access and start system (keyless access) functions are inoperable. (For cancel setting, refer to Function Setting (Customize) > OPERATION)

NOTE:

(1) Connect to the Subaru Select Monitor, and select «Diagnosis» on the «Start» display.

(2) On «Vehicle selection» display, input the target vehicle information and select «Confirmed».

(3) On «Main Menu» display, select «Each System».

(4) On «Select System» display, select «Keyless Access with Push Button Start» and then select «Enter».

(5) On «Select Function» display, select «Work Support».

(6) From «Work Support», select «Keyless access system check».

(7) Select the transmitter to check from the items.

(8) Check that the door lock buzzer sounds (short blips, a continuous beeping sound for the center room antenna) when the access key is near the selected transmitter or antenna.