# Service bulletin M1579

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: 10231506
- Published by NHTSA: 2023\-02\-08
- Manufacturer's number: M1579
- Manufacturer's date: 2023\-01\-24
- NHTSA component: ELECTRICAL SYSTEM; EQUIPMENT; ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM

## NHTSA's summary

SERVICE BULLETIN M1579: REVOLUTION MAX BCM AND ECM UPDATE. PURPOSE: This bulletin informs dealers that a Body Control Module \(BCM\) and Electronic Control Module \(ECM\) update is available on Digital Technician II \(DT II\). The BCM update addresses potential nuisance Diagnostic Trouble Codes \(DTCs\) and ride mode faults, most commonly found after a low voltage crank event or cold temperature start attempt. The ECM calibration update is to address a crank, but no start condition that can occur after a stall, followed by Diagnostic Trouble Code \(DTC\) P0347. This condition can sometimes be corrected by turning the Ignition OFF and waiting 30 or more seconds before turning the Ignition ON again, allowing the starter button to operate as normal.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10231506-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10231506-9999.pdf)

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

## Components

Electrical system, Equipment and accessories, Body control module

## Trouble codes named

P0347

## Vehicles listed

- 2021 to 2023 HARLEY\-DAVIDSON RA1250
- 2021 to 2023 HARLEY\-DAVIDSON RA1250S
- 2021 to 2023 HARLEY\-DAVIDSON RH1250S
- 2022 to 2023 HARLEY\-DAVIDSON RH975
- 2023 HARLEY\-DAVIDSON RH975S

JSON: [/v1/bulletins/10231506](/v1/bulletins/10231506)

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