# Service bulletin ATC2278A

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: 10172437
- Published by NHTSA: 2020\-03\-16
- Manufacturer's number: ATC2278A
- Manufacturer's date: 2020\-02\-11
- NHTSA component: FUEL SYSTEM, DIESEL: PRE\-HEATER; ELECTRICAL SYSTEM:WIRING

## NHTSA's summary

This Account Team Coverage field action authorizes certified repair locations to change the fuel heater wiring harness polarity by switching wiring terminal locations within the fuel heater connector, to install a new fuel heater, and to replace or install a new fuse in the fuel heater circuit on certain B6.7 CM2350 B121B units. This field action is a commercial \(non\-safety\) action to properly re\-enable the fuel heater functionality that was removed to correct a recall condition as described in the recall report for NHTSA recall 19E\-020. This is an update to a previously submitted communication.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10172437-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10172437-9999.pdf)

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

## Components

Electrical system, Fuel system, Wiring and fuses

## Vehicles listed

- CUMMINS B6.7

JSON: [/v1/bulletins/10172437](/v1/bulletins/10172437)

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