# Service bulletin M1391A

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10211174
- Published by NHTSA: 2022\-05\-07
- Manufacturer's number: M1391A
- Manufacturer's date: 2022\-03\-29
- NHTSA component: EQUIPMENT; ELECTRICAL SYSTEM

## NHTSA's summary

SERVICE BULLETIN M1391A: MIDTRONICS GRX\-3110 SOFTWARE UPDATE. PURPOSE: REVISION. This bulletin is to inform the dealer network that a software update to the GRX\-3110 is now available. HD BATTERY DIAGNOSTIC STATION \(PART NUMBER: GRX\-3110HD\). Update 192\-210335K, change from Warranty Code to Test Code that was introduced in version “J”, this update makes your GRX machine capable of testing and charging the Parts and Accessories LiFe batteries \( 4 Ah, 6 Ah, 8 Ah\).addresses new battery part numbers for 2021 models and revised menu selections.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10211174-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10211174-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Equipment and accessories

## Vehicles listed

- HARLEY\-DAVIDSON HARLEY\-DAVIDSON

JSON: [/v1/bulletins/10211174](/v1/bulletins/10211174)

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