SubaruNet Announ

Subarunet Announcement
TO: All Subaru Retailer Service Departments
FROM: SOA Service & Quality Dept.
ATTENTION: Subaru Service Manager, Shop Foremen, and Technicians
FROM: Subaru of America, Inc.
DATE: July 29, 2022
SUBJECT: TCM Damage During WRK-21 Programming
Recently following the release of the WRK-21 CVT Chain Guide Breakage, SOA’s Techline started
to receive some retailer inquiries regarding TCMs not accepting the testing/ temporary pak file
or the final pak file and then failing to communicate.
Investigation of returned TCMs have found this to be a result of a few different scenarios
including:
•
•
•
TCM damage due to use of a standard battery charger or other unspecified battery
maintainer, not the required DCA-8000 or GR-8 in (stabilized) power supply mode.
NOTE: Use of power supply mode is reported to the BMIS website and can be
confirmed by retailer management, Distributor management and SOA.
TCM damage resulting from poor DCA-8000 battery connection due to corroded or
worn charger connections. See below for replacement part information.
TCM damage due to connection failure resulting from damaged / failed USB port on the
SDS Notebook or DSTi, incorrect (unshielded) wrong specification cable used between
SDS notebook and DSTi, and/ or failed OBD cable between DSTi and vehicle OBD port.
See below for replacement part information.
All retailers are strongly encouraged to inspect and confirm the condition of all programming
related equipment (DCA-8000, SDS Notebook, DSTi, Related Cables and Connections) prior to
completing additional WRK or other control module updates to reduce the possibility of control
unit damage.
Additionally ensure all technicians performing WRK-21 have reviewed and are familiar with all
procedures as outlined in the recall bulletin.
Retailers are cautioned, if a TCM is damaged because of faulty equipment or incorrect
procedures followed as part of the WRK programming update, the resulting debit would include
BOTH the costs related to the TCM as well as the CVT assembly since damaging the TCM would
require an automatic replacement of the CVT since the slip mileages cannot be retrieved.
Need Replacement Parts:
DCA-8000 - See https://www.subaruretailersolutions.com/
SDS Notebook and DSTi- See https://www.subarunet.com/home/content/1306
Questions may be directed to SOA’s Technical Helpline (Reprogramming Questions Only
Please) or your District Service & Quality Manager (DSQM)