Unable to diagnose why A/C compressor is not engaging on a BMW E90 despite direct power tests working, lacking proper diagnostic tools to communicate with the vehicle's computer.

The user has a generic diagnostic tool that cannot perform bidirectional controls or read BMW-specific modules for the A/C system, leaving them unable to verify signals and commands from the computer.

Severity

4High

Willingness to Pay

implied

Added

May 6, 2026

Workarounds Described

uses generic Launch Delphi aural scanner that cannot perform bidirectional controls

Implied Software Gaps

Aftermarket scanner software lacks bidirectional control and BMW-specific modules for A/C system diagnosis

App Concept

BMW A/C Pro Scanner

A plug-and-play diagnostic tool specifically for BMW A/C systems that reads all A/C-related modules (IHKA, IHKR, etc.), performs bidirectional controls (compressor on/off, fan speeds), and displays live data with guided troubleshooting. Replaces generic scanners that lack depth and specialized functions.

Key Features

Bidirectional A/C component control (compressor, fans, flaps)
Live data graphing for pressure sensors and temperature readings
BMW-specific trouble code definitions and guided diagnostics
Voltage and signal monitoring at the compressor connector

Target Users: DIY BMW owners and independent mechanics who work on BMW E90, E60, E46 and later models, especially those without expensive dealer-level diagnostic tools.

Revenue Model: $299 one-time device + $49/year subscription for software updates and advanced diagnostics

Existing Solutions Mentioned

Launch Delphi aural

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