# Service bulletin TSB170089\-071720

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: 10111662
- Published by NHTSA: 2017\-08\-15
- Manufacturer's number: TSB170089\-071720
- Manufacturer's date: 2017\-07\-19
- NHTSA component: ELECTRICAL SYSTEM; ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION

## NHTSA's summary

This Technical Service Bulletin describes the verification and resolution to the Allison transmission control module setting diagnostic trouble code P2637 \(J1939 SPN 513 FMI 7\) caused by an Engine Control Module \(ECM\) calibration code issue.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10111662-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10111662-0001.pdf)

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

## Components

Electrical system, Engine, Transmission and driveline, Automatic transmission

## Trouble codes named

P2637

## Vehicles listed

- CUMMINS CUMMINS

JSON: [/v1/bulletins/10111662](/v1/bulletins/10111662)

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