# Service bulletin IK0800688

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: 11026154
- Published by NHTSA: 2025\-12\-05
- Manufacturer's number: IK0800688
- Manufacturer's date: 2025\-11\-05
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

This document is to notify the field of an issue with BCM that causes various electrical system concerns after the vehicle sits for 2\-3 days. This can affect all LT, RH, MV, HV models, 2021MY and up HX, 2024MY and up CE Bus with BCM kernel version 752, 753, and 754. Vehicles built or updated with DLB between 6/1/25 and 11/4/25 are suspected of having these kernels installed on the BCM. The most common complaint is that the steering wheel switches do not function, which, depending on the vehicle model and options, can cause the bus door, pupil warning lights, radio controls, marker interrupt, and cruise control to stop working. Other complaints can include short circuit faults from multiple sensor circuits attached to the BCM setting at the same time, the vehicle will not go into gear, the headlights are stuck on, the brake lights are stuck on, or the parking brake alarm is sounding \(horn chirping\) with the parking brake set. As of 11/4/25, these symptoms can be resolved by updating the BCM to kernel 755 or later with DLB.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026154-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026154-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2024 to 2026 IC BUS CESB
- 2017 to 2026 INTERNATIONAL HV
- 2021 to 2026 INTERNATIONAL HX
- 2016 to 2026 INTERNATIONAL LT
- 2017 to 2026 INTERNATIONAL MV
- 2016 to 2026 INTERNATIONAL RH

JSON: [/v1/bulletins/11026154](/v1/bulletins/11026154)

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