NHTSA ID Number: 10219280
Manufacturer Communication Number: 17-NA-050
Summary
This service bulletin explains how a health report is required when doing repairs on MD LCF vehicles.
Information
Important: Perform the Mimamori ECU download before clearing the DTC and before diagnosing the vehicle.
In an effort for continuous improvement, there is a need to obtain Mimamori ECU (Health Report) information. It is critical to obtain Mimamori ECU information during the repair process. This information will be used to help determine “root cause” for customer’s concerns and develop/validate a field fix.
When a vehicle is presented to a dealer for repair and a DTC is stored in one or more of the control modules listed below, GM requests the Mimamori ECU information be downloaded and synchronized using the EL-52244 cable.
Note: Refer to Warranty Information in this bulletin for the labor operation code when performing the following scan of the modules.
- Validate the information is synchronized before claim submission. All claims will be reviewed for this data.
⇒ Transmission Control Module (TCM)
⇒ Diesel Exhaust Fluid (DEF) Control Module
Note: When replacing the engine or transmission, the Mimamori ECU report labor is already incorporated into the repair and the labor operation mentioned in this bulletin should not be used.
- Perform the Mimamori download when replacing the following;
⇒ Engine repairs/replacements
⇒ Transmission repairs/replacements
Parts Information
No parts are required for this repair.
20 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| CHEVROLET | 4500XD | 2017-2022 |
| CHEVROLET | 5500XD | 2018-2022 |
| CHEVROLET | LOW CAB 3500 | 2016-2019 |
| CHEVROLET | LOW CAB 4500 | 2016-2017 |
| CHEVROLET | LOW CAB 5500 | 2016-2017 |
| CHEVROLET | LOW CAB FORWARD 6500 | 2018 |
1 Associated Document
Manufacturer Communications
Bulletin No.: 17-NA-050
Date: August, 2022
MC-10219280-0001.pdf 229.014KB
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INFORMATION Subject: Information on Mimamori ECU Download (Health Report) Brand: Model: Model Year: VI N: Engine: Transmission: from to from to Chevrolet 3500HD Medium Duty (LCF) 2016 2017 — — IZ3 — 4500/4500XD Medium Duty (LCF) 2017 5500/5500XD Medium Duty (LCF) 2023 I1B 6500XD Medium Duty (LCF) 2018 Involved Region or Country United States Information Important: Perform the Mimamori ECU download before clearing the DTC and before diagnosing the vehicle. In an effort for continuous improvement, there is a need to obtain Mimamori ECU (Health Report) information. It is critical to obtain Mimamori ECU information during the repair process. This information will be used to help determine “root cause” for customer’s concerns and develop/validate a field fix. 4846261 When a vehicle is presented to a dealer for repair and a DTC is stored in one or more of the control modules listed below, GM requests the Mimamori ECU information be downloaded and synchronized using the EL-52244 cable. Note: Refer to Warranty Information in this bulletin for the labor operation code when performing the following scan of the modules. • Validate the information is synchronized before claim submission. All claims will be reviewed for this data. ⇒ Engine Control Module (ECM) ⇒ Transmission Control Module (TCM) ⇒ Diesel Exhaust Fluid (DEF) Control Module Copyright 2022 General Motors
LLC. All Rights Reserved. Note: When replacing the engine or transmission, the Mimamori ECU report labor is already incorporated into the repair and the labor operation mentioned in this bulletin should not be used. • Perform the Mimamori download when replacing the following; ⇒ Engine repairs/replacements ⇒ Transmission repairs/replacements Creating A MMU Report 4969575 1. Without GDS running, connect the MDI to the DLCand laptop. 2. Connect the MMU cable EL- 52244 to the MMU 3. Select LFC Data Capture. 6143001 4. Select Mimamori ECU Download. 6143003 5. Follow the direction on the screen. 6143021 6. Select Run. 6143037 7. Select J2534 Device. 8. Choose the device from the drop down box. 6143042 9. Select the MMU Data Download. 6143042 10. Enter the information as needed in the Box. 6143042 • When the blue light starts flashing, the download bar will start counting. 6143048 When the report has completed downloading, the blue light will stop flashing and a message will show that the MMU information has successfully uploaded. Parts Information No parts are required for this repair. Warranty Information Labor Operation Description Labor Time T0803 DRM Download and Sync Use Published Labor Operation Time Version 7 Modified Released February 23, 2017 Revised August 2, 2017 – Removed the 3500/4500 model row, updated 4500 and 5500 Model Years to 2018 and added a graphic. Revised January 12, 2018 – Add 6500XD to Model section. Revised February 15, 2018 – Added Creating a MMU Report section. Revised October 15, 2019 – Added 2019 and 2020 Model Years Revised December 22, 2021 – Revised to add 2021-2022 Model Years. Revised August 22, 2022 – Added the 2023 Model Year and updated graphics from step 3 on. Additional SI Keywords: MMU GM bulletins are intended for use by professional technicians, NOT a “do-it-yourselfer”. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper WE SUPPORT VOLUNTARY service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your TECHNICIAN vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the CERTIFICATION information.
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