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 MANUALSSUBARU2014FORESTER 2.5I, ENG CD FB25BA, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 10 (AUTOMATIC TRANSMISSION CVT - DIAGNOSTICS)BASIC DIAGNOSTIC PROCEDUREPROCEDURE

2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard Trans

Basic Diagnostic Procedure: Procedure

2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard TransSECTION Procedure

WARNING: This page is about a different variant/trim than selected.

Step	Check	Yes	No
1 CHECK PRE-INSPECTION. Ask the customer when and how the trouble occurred using the interview check list. < Ref. to CHECK LIST FOR INTERVIEW . > Before performing diagnostics, check the following items which might affect CVT problems. General inspection < Ref. to INSPECTION , General Description. > Disconnection of harness connector Visual check for harness damage Oil leakage Stall speed test < Ref. to STALL TEST . > < Ref. to STALL TEST . > Secondary pressure test < Ref. to SECONDARY PRESSURE (LINE PRESSURE) TEST . > < Ref. to SECONDARY PRESSURE (LINE PRESSURE) TEST . > Transfer clutch pressure test < Ref. to TRANSFER CLUTCH PRESSURE TEST . > < Ref. to TRANSFER CLUTCH PRESSURE TEST . > Time lag test < Ref. to TIME LAG TEST . > < Ref. to TIME LAG TEST . > Road test < Ref. to ROAD TEST . > < Ref. to ROAD TEST . > Inhibitor switch < Ref. to INHIBITOR SWITCH . > < Ref. to INHIBITOR SWITCH . >	Is the item that is thought to influence the CVT problem working properly?	Go to step 2 .	Repair the items which may be affecting the CVT trouble.
2 CHECK AT OIL TEMP LIGHT. Turn the ignition switch to ON and wait for at least 2 seconds.	Does the AT OIL TEMP light illuminate?	Go to step 3 .	Check the AT OIL TEMP light.
3 CHECK AT OIL TEMP LIGHT. Start the engine and wait for 2 seconds or more.	Does the AT OIL TEMP light blink?	Go to step 4 .	Go to step 5 .
4 CHECK DTC DISPLAY. Read the DTC. NOTE: If the communication function of Subaru Select Monitor cannot be executed normally, check the communication circuit. < Ref. to COMMUNICATION FOR INITIALIZING IMPOSSIBLE , Diagnostic Procedure for Subaru Select Monitor Communication. >	Is DTC displayed on Subaru Select Monitor?	Record the DTC, time stamp and freeze frame data. Go to step 6 . NOTE: For the time stamp, refer to LAN article. < Ref. to TIME STAMP , CAUTION, General Description. > Depending on DTCs, time stamp may not be stored.	Go to step 5 .
5 PERFORM GENERAL DIAGNOSTICS. Inspect using "Diagnostic Procedure without Diagnostic Trouble Code (DTC)". < Ref. to DIAGNOSTIC PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC) . > Inspect using "Diagnostics with Phenomenon". < Ref. to DIAGNOSTICS WITH PHENOMENON . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.	Is DTC displayed on Subaru Select Monitor?	Go to step 6 .	Finish the diagnosis.
6 PERFORM DIAGNOSIS. Inspect by referring to "Diagnostic Procedure with Diagnostic Trouble Code (DTC)". < Ref. to DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) . > NOTE: For the DTC table, refer to "List of Diagnostic Trouble Code (DTC)". < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > Repair the trouble cause. Perform the Clear Memory Mode. Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.	Is DTC displayed on Subaru Select Monitor?	Inspect by referring to "Diagnostic Procedure with Diagnostic Trouble Code (DTC)". < Ref. to DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) . >	Finish the diagnosis.

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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.