IMPORTANT - The information on this page is ONLY applicable to the 3B engine. It is NOT transferable to the ABY engine. 

The image below depicts the pin locations as if viewing the connector on the ECU.

The image below depicts the 3B ECU pinout when viewing the cable assembly.

The following table defines the functionality of each of the 55 pins on the 3B Motronic ECU. 

Braun Thermoscan Hm3 Manual Apr 2026

| Reading (Oral equivalent) | Indication | |---------------------------|-------------| | Below 36.4°C (97.5°F) | Possibly low | | 36.4°C – 37.4°C (97.5-99.3°F) | Normal | | 37.5°C – 37.9°C (99.5-100.2°F) | Slight fever | | 38.0°C – 38.9°C (100.4-102°F) | Fever | | 39.0°C+ (102.2°F+) | High fever (consult a doctor) |

If you need a PDF of the original manual, search: "Braun Thermoscan HM3 manual PDF" – many archive sites (like ManualsLib) host scanned copies. Braun Thermoscan Hm3 Manual

1. Introduction & Safety The Braun Thermoscan HM3 is a previous-generation infrared ear thermometer designed for quick, accurate readings. Important: This model requires disposable probe filters (Lens Filters) for hygiene and accuracy. Braun Thermoscan Hm3 Manual