# Service bulletin TSIB 26\-01

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: 11032280
- Published by NHTSA: 2026\-05\-06
- Manufacturer's number: TSIB 26\-01
- Manufacturer's date: 2026\-05\-06
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

This TSIB provides information to provide a software update. Some coaches using MCC HVAC Eco\-Tempo ECU \# 07\-10\-009 software T35\-1581 / V1.04 may be experiencing random fault codes due to MCC software errors.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032280-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032280-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2019 to 2022 MCI D4000
- 2019 to 2023 MCI D4000ISTV
- 2019 to 2021 MCI D4005
- 2024 to 2025 MCI D4020ISTV
- 2019 to 2024 MCI D4500
- 2019 to 2024 MCI D4505
- 2020 to 2025 MCI D4520
- 2024 to 2025 MCI D45CRT
- 2024 MCI D45CRTE
- 2021 to 2024 MCI D45CRTELE
- 2019 to 2025 MCI D45CRTLE
- 2019 to 2025 MCI J3500
- 2019 to 2026 MCI J4500
- 2020 to 2021 MCI J4500E
- 2023 MCI J4500E
- 2025 MCI J4500E

JSON: [/v1/bulletins/11032280](/v1/bulletins/11032280)

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