# Service bulletin TT474

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: 10180724
- Published by NHTSA: 2020\-10\-06
- Manufacturer's number: TT474
- Manufacturer's date: 2020\-09\-30
- NHTSA component: EQUIPMENT; ELECTRICAL SYSTEM

## NHTSA's summary

TECHNICAL TIP BULLETIN TT474: LIVEWIRE \- POWER DISCONNECT UPDATE. PURPOSE: Revision. An update to the power disconnect procedure has been made. The wait time of 2 minutes has been increased to 5 minutes to allow for proper system shut down on Electric LiveWire™ \(ELW\). This Technical Tip reinforces the ELW power disconnect procedure found in the owner's and service manuals. The power disconnect procedure must be followed whenever removing 12 V power. Disconnecting OBC \[307\-2\] and not waiting 5 minutes after placing the OFF/RUN switch in OFF position can cause electrical issues including, but not limited to: • Diagnostic Trouble Codes \(DTCs\) generated. • Communication errors between the modules \(OBC, Electric Vehicle Power\-Train \(EVPT\), Rechargeable Energy Storage System \(RESS\)\) that may be unrecoverable requiring replacement of the part.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10180724-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10180724-9999.pdf)

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

## Components

Electrical system, Equipment and accessories

## Vehicles listed

- 2020 HARLEY\-DAVIDSON/LIVEWIRE ELW \(LIVEWIRE\)

JSON: [/v1/bulletins/10180724](/v1/bulletins/10180724)

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