Revolution max BCM and ECM update
Harley-Davidson technical service bulletin M1579 for 2021-2023 Harley-Davidson RA1250S, 2021-2023 Harley-Davidson RA1250 and 2021-2023 Harley-Davidson RH1250S and others.
- Bulletin number
- M1579
- Component
- Equipment
- 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.
Vehicles covered
- Harley-Davidson RA1250S 2021-2023 202120222023
- Harley-Davidson RA1250 2021-2023 202120222023
- Harley-Davidson RH1250S 2021-2023 202120222023
- Harley-Davidson RH975S 2023 2023
- Harley-Davidson RH975 2022-2023 20222023
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