16-132-20R
Service Bulletin Details
Public Details for: 16-132-20R
Diagnostic information for alleged chain slip condition on tr580 / tr690 transmissions.
- 2022 - 2021 - 2020 - 2019 - 2018 - 2017 -
Models from 2022
2022 SUBARU LEGACY |
2022 SUBARU OUTBACK |
Models from 2021
2021 SUBARU ASCENT |
2021 SUBARU CROSSTREK |
2021 SUBARU FORESTER |
2021 SUBARU IMPREZA |
2021 SUBARU LEGACY |
2021 SUBARU OUTBACK |
Models from 2020
2020 SUBARU ASCENT |
2020 SUBARU CROSSTREK |
2020 SUBARU FORESTER |
2020 SUBARU IMPREZA |
2020 SUBARU LEGACY |
2020 SUBARU OUTBACK |
Models from 2019
2019 SUBARU ASCENT |
2019 SUBARU CROSSTREK |
2019 SUBARU FORESTER |
2019 SUBARU IMPREZA |
2019 SUBARU LEGACY |
2019 SUBARU OUTBACK |
Models from 2017
2017 SUBARU IMPREZA |
ATTENTION: GENERAL MANAGER q PARTS MANAGER q CLAIMS PERSONNEL q IMPORTANT - All Service Personnel Should Read and Initial in the boxes provided, right. SERVICE MANAGER q © 2020 Subaru of America, Inc. All rights reserved. SERVICE BULLETIN APPLICABILITY: 2018-22MY Legacy and Outback 2017-22MY Impreza 2018-22MY Crosstrek 2019-22MY Forester 2019-22MY Ascent SUBJECT: NUMBER: 16-132-20R DATE: 12/18/20 REVISED: 07/22/21 Diagnostic Information for Alleged Chain Slip Condition on TR580 / TR690 Transmissions INTRODUCTION: This Service Information Bulletin provides updated diagnostic procedures to follow and a brief questionnaire to complete when diagnosing an alleged Chain Slip condition on the TR580 and TR690 model CVT transmissions used in the models listed above. In some cases, the customer may have had a concern of hearing an abnormal sound and / or felt an unusual vibration while driving. This information is intended to provide Technicians a user-friendly procedure which will help to ensure an accurate diagnosis and reduce the possibility of unnecessary CVT replacements. SERVICE PROCEDURE / INFORMATION: Customer satisfaction and retention starts with performing quality repairs. After completing the questionnaire located at the end of the Troubleshooting section, following the diagnostic procedures supplied in this bulletin and when determined necessary, service procedures for CVT and / or TCM replacement remain unchanged. Always refer to the applicable Service Manual and review the full requirements of the repair being performed. The Service Manual procedures contain information critical to performing an effective repair the first time, every time. This includes but is not limited to important SAFETY precautions, proper inspection criteria, necessary special tools, required processes and related one-time-use parts needed for a complete and lasting repair. VERY IMPORTANT: With any customer concern, it is important to get a complete and detailed description from them so their condition can be duplicated. Duplicating the condition is critical for a proper diagnosis and successful repair. Whenever using this TSB for alleged CVT Chain Slip diagnosis, Technicians are required to submit a completed QMR which includes all Flow Chart test results, SSM data and a COMPLETED copy of the questionnaire found on pg. 8. This information will be extremely helpful for SBR Engineers when analyzing what the customer was experiencing as Chain Slip. Cooperation with this special information request is greatly appreciated! 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. Continued... Bulletin Number: 16-132-20R; Revised: 07/22/21 Page 1 of 11 Troubleshooting Flow Chart for Alleged CVT Chain Slip: Chain slip** is occuring. Replace the CVT Assy and TCM*** NOTES: ***SSM Data MUST be attached whenever submitting reports for review. See table below for models requiring TCM replacement in addition to CVT assembly replacement. Model / TCM Replacement Y/N? Legacy/Outback- 2.5L TR580: 20MY - Y 2.4L DIT TR690: 20MY - Y Crosstrek- TR580: 20MY - Y Ascent- TR690: 19MY - Y All other Models / MYs N Engine and Primary Pulley Speeds Overlap in this Graph Gear Ratio Continued... Bulletin Number: 16-132-20R; Revised: 07/22/21 Page 2 of 11 Engine Speed (rpm) Primary Pulley Speed (rpm) Example screenshot of TCM PIDS with Front Wheel Speed and Secondary Revolution Speed selected. Engine Speed Primary Pulley Speed Secondary Pulley Speed Front Wheel Speed Gear Ratio Times (s) Continued... Bulletin Number: 16-132-20R; Revised: 07/22/21 Page 3 of 11 follow the Primary Pulley Continued... Bulletin Number: 16-132-20R; Revised: 07/22/21 Page 4 of 11 Does the condition occur during up shift (up ratio) or down shift (down ratio)? FIG.55 for See FIG. FIG.44 & FIG. FIG. 5 details. FIG. 6 Continued... Bulletin Number: 16-132-20R; Revised: 07/22/21 Page 5 of 11 FIG. 5 Does the condition occur right before or after the lock-up operaFIG.77 for tion? See FIG. example. Record and analyze the Engine SSM data to determine if the torque fluctuation is being caused by the engine. See forFIG. example. See Fig. FIG. 68 & for 9 example. Continued... Bulletin Number: 16-132-20R; Revised: 07/22/21 Page 6 of 11 FIG. 6 FIG. 7 Continued... Bulletin Number: 16-132-20R; Revised: 07/22/21 Page 7 of 11 FIG. 8 The graph above is an example of recorded SSM data showing the torque fluctuation is NOT being caused by the transmission but by torque fluctuation of the engine. FIG. 9 Bulletin Number: 16-132-20R; Revised: 07/22/21 Continued... Page 8 of 11 Continued... Bulletin Number: 16-132-20R; Revised: 07/22/21 Page 9 of 11 Questionnaire for Alleged CVT Chain Slip Condition Please use all applicable check boxes. vehicle speed box. Please enter a number value in Please attach SSM data files for both before and after pre- and post-repair. No. Item 1 CVT Temperature 2 Location 3 Vehicle Speed 4 Condition: Immediately after starting the engine Highway Vehicle Used for Towing? 6 Frequency of Slip Condition 7 How Long Has Condition Been Occurring? Symptoms: Warming-up Paved-road After warming-up Rough-road mph Driving Condition 5 8 Answer While accelerating While decelerating Yes Only once A few times It just started While cruising No Intermittent Within the last month Always From new Noise Vibration Shock/Bump Hesitation/Surge Shudder Jerking/Bucking Engine RPM rise/flare Lack of power / not accelerate Deceleration feeling Engine RPM not rise Engine RPM fluctuation / hunting gear Other (please describe:) T/M assy replacement T/M part(s) replacement AT relearn / torque converter relearn 9 Repair(s): TCM Re-programing No repair made (inspection only) Other (please describe:) Example: Satisfaction / dissatisfaction level, further improvement requirements. 10 Customer Comments Post-Repair: Continued... Bulletin Number: 16-132-20R; Revised: 07/22/21 Page 10 of 11 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. Bulletin Number: 16-132-20R; Revised: 07/22/21 Page 11 of 11