Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSSUBARU2014OUTBACK 2.5I, STANDARD TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTDRIVERS ASSISTANCE SYSTEMS - ADASSUBARU EYESIGHT SYSTEM (DRIVER ASSIST) (DIAGNOSTICS)DIAGNOSTICS WITH PHENOMENONDIAGNOSTIC PROCEDURE WITH PHENOMENONPRE-COLLISION BRAKE, AT RAPID START PREVENTION CONTROL

2014 Subaru Outback 2.5i, Standard Trans

Pre-Collision Brake, At Rapid Start Prevention Control

2014 Subaru Outback 2.5i, Standard TransSECTION Pre-Collision Brake, At Rapid Start Prevention Control

Phenomenon		Check Item	Reference
1	Pre-collision brake does not operate. Or the pre-collision brake operates, but the vehicle cannot stop safely before collision. Or the pre-collision brake is released automatically. Or the pre-collision brake assist does not operate.	(1) Check that the pre-collision brake OFF indicator light goes off.	If this indicator light illuminates, the operation is not performed.
1		(2) Using check list (pre-collision brake), check the following and respond to it. Is this applied to the condition that the pre-collision brake does not operate, or there is a high possibility that the vehicle cannot stop safely before collision with the pre-collision brake? Is this applied to the condition that there is a high possibility that the pre-collision brake does not operate due to the recognition status of the stereo camera? Is this applied to the condition that the system does not operate correctly and the turning OFF of the pre-collision brake is desired? Is this applied to the condition that the pre-collision brake OFF indicator light illuminates?	< Refer to CHECK LIST (PRE-COLLISION BRAKE) , DIAGNOSTIC PROCEDURE WITH PHENOMENON, Diagnostics with Phenomenon. > When there is a relevant item in the check list, it can be the cause of malfunction. Eliminate the cause, and check that the malfunction has been improved. If not solved, the stereo camera may be malfunctioning.
2	Pre-collision brake operates improperly. Or the pre-collision brake is not released. Or the pre-collision brake assist operates improperly.	(1) Using check list (pre-collision brake), check the following and respond to it. Is this applied to the condition that the turning OFF of the pre-collision brake is desired? Is this applied to the condition that the pre-collision brake may operate?	< Refer to CHECK LIST (PRE-COLLISION BRAKE) , DIAGNOSTIC PROCEDURE WITH PHENOMENON, Diagnostics with Phenomenon. > When there is a relevant item in the check list, it can be the cause of malfunction. Eliminate the cause, and check that the malfunction has been improved. If not solved, the stereo camera may be malfunctioning.
3	Pre-collision brake OFF indicator light does not go off. Or the pre-collision brake OFF indicator light illuminates automatically.	(1) Check that this failure occurs during engine start.	Light illumination for a while after the engine start is a normal.
		(2) Using the SSM, check that the system is not in the HALT condition with the cancel code.	If the cancel code is displayed, check the diagnosis contents from the List of Cancel Code, and perform the corresponding operations. < Refer to LIST OF CANCEL CODE . > If the cancel code is not displayed, go to (3).
		(3) Check the pre-collision brake OFF switch.	< Refer to DTC B28B0 STEREO CAMERA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
4	Pre-collision brake OFF indicator light does not illuminate. Or the pre-collision brake OFF indicator light goes off automatically.	(1) Check that this failure occurs during engine start.	Even if the pre-collision brake is turned off, it is turned on again when the engine switch is turned off and the engine has restarted.
4		(2) Check the pre-collision brake OFF switch.	< Refer to DTC B28B0 STEREO CAMERA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
5	AT rapid start prevention control does not operate. Or the AT rapid start prevention control is released automatically.	(1) Check that the pre-collision brake OFF indicator light goes off.	If this indicator light illuminates, the operation is not performed.
5		(2) Using check list (at rapid start prevention control), check the following and respond to it. Is this applied to the condition that the AT rapid start prevention control may not operate? Is this applied to the condition that the pre-collision brake OFF indicator light illuminates?	< Refer to CHECK LIST (AT RAPID START PREVENTION CONTROL) , DIAGNOSTIC PROCEDURE WITH PHENOMENON, Diagnostics with Phenomenon. > When there is a relevant item in the check list, it can be the cause of malfunction. Eliminate the cause, and check that the malfunction has been improved. If not solved, the stereo camera may be malfunctioning.
6	AT rapid start prevention control operates improperly. Or the AT rapid start prevention control is not released.	(1) Using check list (at rapid start prevention control), check the following and respond to it. Is this applied to the condition that the turning OFF of the AT rapid start prevention control is desired? Is this applied to the condition that the AT rapid start prevention control may operate?	< Refer to CHECK LIST (AT RAPID START PREVENTION CONTROL) , DIAGNOSTIC PROCEDURE WITH PHENOMENON, Diagnostics with Phenomenon. > When there is a relevant item in the check list, it can be the cause of malfunction. Eliminate the cause, and check that the malfunction has been improved. If not solved, the stereo camera may be malfunctioning.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.