# Service bulletin IK0800677

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: 11027297
- Published by NHTSA: 2026\-01\-07
- Manufacturer's number: IK0800677
- Manufacturer's date: 2025\-12\-10
- Campaign id or software version: IK0800677
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

This document is intended to provide supplemental information for concerns with brake light switches and pressure sensors used by the BCM and PIM module to determine if the operator of the vehicle is applying the service brakes. All S13 vehicles are equipped with BCM feature 597483 \(BCM PROG, BRAKE SWITCH, Use With Brake Application Pressure Switch\). 597483 uses a normally open brake pressure switch that closes with 2\-6 psi of air pressure and a brake application pressure sensor. When the switch is closed or the pressure sensor reads higher than 4psi, the BCM considers the brakes applied and will broadcast that over the J1939 networks to other modules. The S13 also includes a redundant brake switch that is wired directly to the PIM. This switch is normally closed and opens with 2\-6 psi of air pressure. If the S13 ECM believes the brakes are applied from one of these brake signals, it can reduce or completely cut throttle input.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11027297-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11027297-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2024 to 2026 INTERNATIONAL HV
- 2024 to 2026 INTERNATIONAL HX
- 2024 to 2026 INTERNATIONAL LT
- 2024 to 2026 INTERNATIONAL RH

JSON: [/v1/bulletins/11027297](/v1/bulletins/11027297)

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