Service bulletin 1HD-T4B3J-12
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 | 10125148 |
| Published by NHTSA | 2017-12-14 |
| Manufacturer's number | 1HD-T4B3J-12 |
| Manufacturer's date | 2017-11-01 |
| NHTSA component | ELECTRICAL SYSTEM |
NHTSA's summary
TECH TIP TT427: HDLAN/CAN SYSTEM VEHICLES - INCORRECT ODOMETER VALUE. Technical Services is receiving an increased number of calls related to incorrect odometer values in HDLAN (Harley-Davidson local area network)/CAN (Controller area network) vehicle speedometers and ECM (Electronic control module)s. This condition occurs when the original ECM or speedometer is disconnected and substituted with the ECM or speedometer from a different motorcycle without first removing the main fuse from both vehicles. If the technician installs an ECM or speedometer from another motorcycle for diagnostic purposes, it could result in an increased odometer value, if the main fuse on both vehicle is not removed first. The higher odometer value from either ECM or speedometer is stored in the speedometer of the vehicle on which it is installed. Resolution: Always remove the main fuse, per the service manual, before disconnecting or connecting the ECM or speedometer. It is important to perform this task any time an electrical component is serviced.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Electrical system
| HARLEY-DAVIDSON HARLEY-DAVIDSON |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.