# Service bulletin TT470

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: 10171057
- Published by NHTSA: 2020\-02\-05
- Manufacturer's number: TT470
- Manufacturer's date: 2020\-01\-13
- NHTSA component: ELECTRICAL SYSTEM; EQUIPMENT

## NHTSA's summary

TECHNICAL TIP BULLETIN TT470: CELLULAR STRENGTH IMPROVEMENT OPTIONS. PURPOSE: Dealers with low cellular signal strength inside the dealership have experienced difficulty performing TCU \(Telematic Control Unit\) initialization. Harley\-Davidson does not currently endorse any manufacturer or option of cell communications. The bulletin provides awareness of some options available if cellular reception is poor inside the dealership.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10171057-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10171057-9999.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/10171057](/v1/bulletins/10171057)

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