This bulletin provides the diagnostic procedure when checking for excessive battery draw for any Subaru model.

Prior To Beginning Test:

• Be certain the vehicle battery is fully charged.
• The battery posts and cable ends are free of corrosion, dirt, sealer and in good condition.
• Be sure to record the customer’s radio station and satellite radio station pre-sets as they will be lost during the test, along with any seat memory settings.
• You may not use an aftermarket 9V memory device in the power outlet to retain any ECU memory.
• Any aftermarket accessories will also need to be disconnected. These items will affect the test results and may cause false readings or misdiagnosis.

• Pen and paper for recording radio and satellite radio pre-sets;
• Digital volt ohmmeter;
• 10 mm wrench; and
• 16-gauge bypass wire, about 12 inches long, with proper securing attachments at each end.

1. Remove the battery negative cable.
2. Connect one end of the bypass wire to the battery’s negative post, then connect the other end to the negative battery cable end. Simply wrapping then twis...