# Service bulletin TSB170076\-060820

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: 10117910
- Published by NHTSA: 2017\-09\-22
- Manufacturer's number: TSB170076\-060820
- Manufacturer's date: 2017\-08\-18
- NHTSA component: EQUIPMENT:ELECTRICAL

## NHTSA's summary

This Technical Service Bulletin describes the verification and resolution of fault codes 3838 and 6637 always inactive when viewed in Insite electronic service tool on engines equipped with multiplexed variable speed fan drive.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10117910-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10117910-0001.pdf)

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

## Components

Equipment and accessories

## Vehicles listed

- CUMMINS ISX12 G

JSON: [/v1/bulletins/10117910](/v1/bulletins/10117910)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20TSB170076-060820&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10117910&vehicle=Service%20bulletin%20TSB170076-060820)