# Service bulletin SB\-57

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: 10136237
- Published by NHTSA: 2018\-05\-07
- Manufacturer's number: SB\-57
- Manufacturer's date: 2018\-01\-25
- NHTSA component: ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:SOFTWARE

## NHTSA's summary

There is the possibility that the inverter may stop charging the house batteries after one charging sequence even with the motorhome plugged into shore power. This could lead to the house batteries not charging while plugged into shore power. To repair this, the multiplex system program needs to have a programming update installed. Tiffin included parts and instructions needed to update the system by taking to our dealer or a reputable dealer of their choice free of charge to customer.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10136237-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10136237-0001.pdf)

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

## Components

Electrical system, Equipment and accessories, Labels and manuals, 12\-volt battery, Software

## Vehicles listed

- 2018 TIFFIN BUS
- 2018 TIFFIN PHAETON

JSON: [/v1/bulletins/10136237](/v1/bulletins/10136237)

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