DTC U0122 and Hesitation at Highway Speeds- ECM Reprogramming File Availability – 2019 Subaru Ascent

NHTSA ID Number: 10160487

Manufacturer Communication Number: 11-190-19R

Summary

This bulletin announces availability of ECM reprogramming files to optimize the ECM. This bulletin announces availability of ECM reprogramming files to optimize the ECM. The new files contain logic which will revise: (1) the ECM detection of DTC U0122; (2) the EGR flow rate to address a limited number of customer concerns about a slight hesitation felt while driving at highway speeds and using the cruise control.

 

1 Affected Product

Vehicle

MAKE MODEL YEAR
SUBARU ASCENT 2019

INTRODUCTION:

This bulletin announces availability of ECM reprogramming files to optimize the ECM.  The new files contain logic which will revise:

  • the ECM detection of DTC U0122
  • the EGR flow rate to address a limited number of customer concerns about a slight hesitation felt while driving at highway speeds and using the cruise control.

 

PRODUCTION CHANGE INFORMATION:

The new logic was incorporated into production starting with VIN K3457324.

 

PACK FILE APPLICABILITY:

Model PAK File Name New ECM  Part Number Old ECM  Part Numbers Decryption Keyword New CID Number
2019MY Ascent 22765AL733.pak 22765AL733 22765AL730, 22765AL731 & 22765AL732 8ABA4DB3 LT8D600A

 

SERVICE PROCEDURE:

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

  • Reprogram the ECM following the normal FlashWrite procedure.

Subaru of America, Inc. (SOA) highly recommends connecting the Subaru Midtronics GR8 Diagnostic Battery Charger to the vehicle and utilizing the Power Supply Mode feature anytime a vehicle control module is being reprogrammed.  Follow the procedure as outlined in document  GR8-1100 on STIS for use of the GR8’s Power Supply Mode:

  • Confirm all electrical loads such as lights, audio, HVAC, seat heaters, and rear defroster are all switched OFF before setting up for Power Supply Mode.
  • Select the correct battery type (Flooded, AGM or AGM Spiral).
  • Select the CCA which matches the vehicle’s battery (NOTE: OE and replacement batteries have different CCA ratings. Always confirm the battery rating before proceeding.)
  • If the “Charge BatteryWARNING appears, the battery MUST be charged before attempting reprogramming.
  • DO NOT connect the DSTi or SDI until the GR8 Power Supply mode has completed its battery test mode and the Charging Voltage has dropped to a steady 13.5 Volts on the display.
  • If the GR8 “beeps” or the Status Light flashes, a diagnostic charge should be performed on the battery before proceeding further.
  • Once Power Supply Mode reaches a steady 13.5 volts, connect the DSTi or SDI to the OBD connector and initiate the 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.

IMPORTANT:

This information is applicable to the Midtronics GR8 Diagnostic Battery Charger ONLY. It does not apply to any other brand / type of “generic” battery charger whatsoever.  ONLY the GR8 and its Power Supply Mode feature has been tested and approved by SOA.

Once the GR8 is connected to the vehicle, as long as the battery is fully charged, it takes less than 3 minutes to boot-up the charger, select Power Supply Mode, and have the battery voltage stabilized and ready for reprogramming.

REMINDER:  If the GR8 indicates the vehicle’s battery must be charged, charge the battery using the GR8 before proceeding to reprogram the vehicle.

NOTE:  Control module failures as a result of 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.



NUMBER: 11-190-19R
DATE: 02/12/19
REVISED: 03/04/19

https://www.nhtsa.gov/recalls?nhtsaId=10160487

https://static.nhtsa.gov/odi/tsbs/2019/MC-10160487-9999.pdf

Download (PDF, 282KB)


 

What J2534 reprogramming capabilities are available?

(4a) J2534 Reprogramming
Subaru reprogramming files using a generic (non-OEM) SAEJ2534 pass-thru vehicle programming device are available by contacting Service Technical Information Company toll free at 1-866-428-2278. The cost for the CD-ROM with all reprogramming files is $75.00 plus S/H and applicable state tax. Files will be updated four (4) times per year, in CD-ROM format, with all available reprogramming service information at the same above offered cost. Authorized Subaru Dealers are provided the same reprogramming information.

Before purchasing, the reprogramming details can be found in the following Reprogramming J-2534 Files chart. Click the link to view the PDF chart.

Subaru J2534 Reprogramming software meets the latest available J2534-1 specification. Our Reprogramming J2534 Files chart does not specify the Calibration Identification Number (CID); however, this information is included in our offered CD-Rom.

Note: The ECM or TCM being reprogrammed may already contain some or all of the reprogramming files listed in the Reprogramming J2534 Files chart shown by release date. It is possible to damage the vehicles ECM/TCMduring the reprogramming event. Once the reprogramming process has started, it is recommended not to interrupt the process until the event is completed. If you experience any problems, please contact your scan tool maker for further instructions.

 

(4b) Are all pre-2004MY Subaru vehicles compatible with J2534?

No. Subaru has no reprogramming capability for model years 1996-1998. Starting with our 1999 model year, please see our Reprogramming Pre-J2534 Files chart for affected model reprogramming information.

Both pre-J2534 reprogramming and J2534 pass thru reprogramming files are included in the offered HDS kit software for aftermarket service provider application.

techinfo.subaru.com


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Last update on 2019-09-11 / Affiliate links / Images from Amazon Product Advertising API

Last update on 2019-09-11 / Affiliate links / Images from Amazon Product Advertising API

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