J2534 Passthru Interface
The HDS HIM (Honda Interface Module) is the vehicle communication interface used with Honda's HDS diagnostic software. It connects the laptop to the Honda/Acura diagnostic connector and handles the protocols Honda ECUs use for full diagnostics and module reprogramming. The HIM is the classic hardware pairing for HDS on older and mid-generation Honda vehicles; on newer models Honda moved to MVCI/J2534 interfaces and the i-HDS software environment. As a dedicated VCI, its job is a stable communication link for reading data and, importantly, for PCM/ECU reflash operations where a dropped connection can corrupt a module. Genuine and cloned HIM units exist; a reliable interface is recommended for any programming work. It is primarily useful within the Honda diagnostic ecosystem rather than as a generic pass-thru.
The HIM is Honda's diagnostic/flash hardware; Softechpro Solutions is software that prepares an ECU file (emissions/DTC-off modules, tuning, checksum correction) and does not replace an OEM interface for programming Honda modules.
See Softechpro plansTry the file service