Battery Drain With Mechanical Key Inserted In Ignition – 2022 Subaru Forester

NHTSA ID Number: 10228792

Manufacturer Communication Number: 07-214-22

Summary

This bulletin announces availability of a reprogramming file for the Body Integrated Unit (BIU) to address rare cases of battery drain while the mechanical key (key start models) is inserted into the ignition.

 


NUMBER: 07-214-22
DATE: 12/29/22

APPLICABILITY:2022MY Forester
SUBJECT:Battery Drain With Mechanical Key Inserted In Ignition

 

INTRODUCTION:

This bulletin announces availability of a reprogramming file for the Body Integrated Unit (BIU) to address rare cases of battery drain while the mechanical key (key start models) is inserted into the ignition. This is caused by the Controller Area Network (CAN) remaining awake whenever the key is in the ignition switch. This enhanced logic allows the BIU to enter into sleep mode. If a battery drain issue is encountered under the condition described, perform the reprogramming procedure outlined below.

 

PRODUCTION CHANGE INFORMATION:

The production change information is currently TBD.

 

PAK FILE APPLICABILITY:

ModelMYSpecificationFile DescriptionDecryption Keyword
Forester222.5L NA82201SJ432.pak277BD9465

This file is included in the July 2022 SSM software update.

 

SERVICE PROCEDURE / INFORMATION:

REMINDER:  Customer satisfaction and retention starts with performing quality repairs.

  • Reprogram the BIU following the normal FlashWrite procedure.

Subaru of America, Inc. (SOA) highly recommends utilizing either the Subaru Midtronics DCA8000 Dynamic Diagnostic Charging System or the Subaru Midtronics GR8-1100 Diagnostic Battery Charger to the vehicle in the Power Supply Mode feature anytime a vehicle control module is being reprogrammed. Once the Midtronics charger is connected to the vehicle, if the battery is fully charged, it will take less than three (3) minutes to boot-up the charger, select the Power Supply Mode, and have the battery voltage stabilized and ready for reprogramming.

 

NOTES:

  • For instructions on using the Power Supply Mode, reference the applicable User Manual for the Midtronics DCA-8000 Dynamic Diagnostic Charging System and the Midtronics GR81100 Diagnostic Battery Charger on STIS.
  • Confirm all electrical loads such as lights, audio, HVAC, seat heaters, and rear defroster are all switched OFF before setting up the charger for Power Supply Mode.
  • Select the correct battery type (Enhanced Flooded, Flooded, Gel, AGM or AGM Spiral).
  • Input the CCA which matches the vehicle’s battery. NOTE: OE and replacement batteries have different CCA ratings. Always confirm the battery’s CCA rating before proceeding.
  • If using a DCA-8000 Dynamic Diagnostic Charging System, set the power supply voltage to 13.5 Volts.
  • DO NOT connect the DST-i or DST-010 until the Power Supply mode function has completed its battery test mode and the Charging Voltage has dropped to and shows a steady 13.5 Volts on the display.
  • Once Power Supply Mode reaches a steady 13.5 Volts, connect the DST-i or DST-010 to the OBD connector and proceed with initiating the normal FlashWrite reprogramming process.
  • Amperage will fluctuate based upon the vehicle’s demand for power. NOTE: If the voltage rises beyond 14 Volts while programming is in process, the procedure will abort. This can indicate a need to test or charge the vehicle battery before any further attempt at programming is made.
  • ALWAYS set the power supply voltage to 13.5 Volts when using Power Supply Mode. NEVER turn the ignition switch on when charging at voltages 15 Volts or higher.

REMINDER: If the DCA-8000 or GR8-1100 indicates the vehicle’s battery must be charged, charge the battery fully before proceeding to reprogram the vehicle while using the Power Supply Mode.

NOTE: Control module failures resulting from battery discharge during reprogramming are not a matter for warranty. Should any DTCs reset after the reprogramming update is performed, diagnose per the procedure outlined in the applicable Service Manual.

 

VERY IMPORTANT:

This information is applicable to the Subaru Midtronics DCA-8000 Dynamic Diagnostic Charging System and the Subaru Midtronics GR8-1100 Diagnostic Battery Charger ONLY. It does not apply to any other brand / type of “generic” battery charger whatsoever. ONLY the DCA-8000 and the GR81100 and their Power Supply Mode feature have been tested and approved by SOA.

 

 


1 Affected Product

Vehicle

MAKEMODELYEAR
SUBARUFORESTER2022

 


1 Associated Document

Manufacturer Communications

NUMBER: 07-214-22
DATE: 12/29/22

MC-10228792-0001.pdf 1295.573KB

 


 

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