P0890 TCM Power Relay Sense Circuit P030x Random/Multiple Cylinder Misfire Detected DTC 0116 Engine Coolant Temperature Sensor 1 Circuit Range/Performance – 2019-2022 Subaru Forester

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Bulletin Number: 09-89-22R; Revised: 06/14/22 Page 1 of 4 SERVICE BULLETIN Continued… CAUTION: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS COULD RESULT IN SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS. Subaru Service Bulletins are intended for use by professional technicians ONLY. They are written to inform those technicians of conditions that may occur in some vehicles, or to provide information that could assist in the proper servicing of the vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do the job correctly and safely. If a condition is described, DO NOT assume that this Service Bulletin applies to your vehicle, or that your vehicle will have that condition. Subaru of America, Inc. is ISO 14001 Compliant ISO 14001 is the international standard for excellence in Environmental Management Systems. Please recycle or dispose of automotive products in a manner that is friendly to our environment and in accordance with all local, state and federal laws and regulations. NUMBER: 09-89-22R DATE: 05/12/22 REVISED: 06/14/22 APPLICABILITY: 2019-22MY Forester SUBJECT: P0890 TCM Power Relay Sense Circuit P030x Random/Multiple Cylinder Misfire Detected DTC 0116 Engine Coolant Temperature Sensor 1Circuit Range/Performance INTRODUCTION: This bulletin announces availability of new reprograming files for the Engine Control Module (ECM). These files have been developed to address certain limited concerns of the starter motor not operating. This concern is heavily dependent upon specific driving and fuel conditions, and it can occur under any of the three specific driving scenarios outlined below. It is IMPORTANT to fully review the details below to accurately confirm the concern and perform the Reprogramming procedure when necessary. PRODUCTION CHANGE INFORMATION: This new logic has been incorporated into Forester production as per the starting VIN NJ461287. DESCRIPTIONS OF CONCERN: Scenario A: While attempting a restart after a short drive cycle in low ambient temperatures (less than 0 Degrees Celsius / 32 Degrees Fahrenheit), the starter motor may not operate. DTC P0890 (TCM Power Relay Sense Circuit Low) will likely be stored in the ECM under this condition. Condensed moisture in the ignition relay can cause the contact points to freeze under these conditions. The new logic enhances the relay self-shutdown program, eliminating the possibility of frozen relay contacts.. Scenario B: When running the engine after an initial start-up, DTC P030x (Random /Multiple Cylinder Misfire Detected) may be stored in the ECM. The combination of the cylinder head tolerance combined with carbon deposits may cause a disturbed tumble vortex resulting in a misfire. The new logic optimizes the injection timing program to reduce engine misfire. ATTENTION: GENERAL MANAGER q PARTS MANAGER q CLAIMS PERSONNEL q SERVICE MANAGER q IMPORTANT – All Service Personnel Should Read and Initial in the boxes provided, right. ©2022 Subaru of America, Inc. All rights reserved. Bulletin Number: 09-89-22R; Revised: 06/14/22 Page 2 of 4 Continued… Scenario C: (Vehicle Fitted with Engine Block Heater ONLY) When the engine coolant is heated by the engine block heater, the ECM may detect DTC P0116 (Engine Coolant Temperature Sensor 1 Circuit Range/Performance). This occurs when the ECM detects a temperature reading conflict from the sensor data. This can result in insufficient heater output. The new logic optimizes the detection of an engine block heater fitted or not fitted to the vehicle. NOTE: Reprogram the ECM ONLY after confirming any of the scenarios as described above are present. SERVICE PROCEDURE / INFORMATION: REMINDER: Customer satisfaction and retention starts with performing quality repairs. • Reprogram the ECM following the normal FlashWrite procedure. • See the information below for pak file applicability. Subaru of America, Inc. (SOA) highly recommends connecting either the Subaru Midtronics DCA8000 Dynamic Diagnostic Charging System or the Subaru Midtronics GR8-1100 Diagnostic Battery Charger to the vehicle and utilizing 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 takes 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 GR8- 1100 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 (Flooded, EFB, 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-010, DST-i or SDI 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-010, DST-i or SDI 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 14V 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. Bulletin Number: 09-89-22R; Revised: 06/14/22 Page 3 of 4 Continued… 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 GR8- 1100 and their Power Supply Mode feature have been tested and approved by SOA. PAK FILE APPLICABILITY: Model MY Specification Old CID # File Name Decryption Keyword New CID # Forester 19 2.5L NA CVT XE1F200A 22765AL824.pak D295B7C5 XE1F800A XE1F20ZA XE1F201A XE1F202A XE1F20YA XE1F20XA XE1F202A XE1F500A XE1F501A 20 2.5L NA CVT XE1M010a00G 22765AN463.pak E2B38132 XE1M500a00G XE1M100a00G XE1M300a00G XE1M301a00G 21 2.5L NA CVT XE1P100a00G 22765AR672.pak 7BA8F183 XE1P500a00G XE1P101a00G 22 2.5L NA CVT XE1R000k00G 22765AR601.pak 262C8512 XE1R200k00G XE1R000a00G 22765AR551.pak D412BC85 XE1R200a00G XE1R000z00G 22765AR611.pak 70B7BBA5 XE1R200z00G WARRANTY / CLAIM INFORMATION: For vehicles within the Basic New Car Limited Warranty period, this repair may be submitted using the following claim information: Labor Description Labor Operation # Fail Code Labor Time MFI OBDII ECM Reprogramming A455-288 UPG-48 0.4 Bulletin Number: 09-89-22R; Revised: 06/14/22 Page 4 of 4 IMPORTANT: Always note the original Calibration Identification number (CID) the vehicle came in with on the repair order before reprogramming and, make sure to list the NEW CID for any newly-installed programming (as confirmed from the actual control module AFTER installation). The NEW CID MUST also be noted on the repair order as this information is required for entry in the Miscellaneous Detail field during claim submission. NOTE: The pak file listings provided in this bulletin are the latest available at the time of publishing. Updates are often released thereafter without revision to the original bulletin. For this reason, it is critical to always have the latest version of Select Monitor software installed on your system. You can confirm if a later version is available by entering the CID listed in this bulletin into FlashWrite. If a newer CID is shown as available in FlashWrite, reprogram using that file. IMPORTANT REMINDERS: • SOA strongly discourages the printing and/or local storage of service information as previously released information and electronic publications may be updated at any time. • Always check for any open recalls or campaigns anytime a vehicle is in for servicing. • Always refer to STIS for the latest service information before performing any repairs.

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