The H&S Mini Maxx is a specialized tuning device designed for diesel vehicles, particularly those equipped with modern emissions systems such as Diesel Particulate Filters (DPFs) and Selective Catalytic Reduction (SCR) technologies. Its installation requires careful attention to wiring, sensor placement, and interface configuration. This guide draws exclusively from the official installation manual and related documentation provided by H&S Performance, offering step-by-step instructions for integrating the Mini Maxx into a vehicle system. The focus is on technical accuracy, practical application, and user clarity, with an emphasis on power supply integration, sensor installation, and software setup.
Overview of the H&S Mini Maxx System
The Mini Maxx is a compact, high-performance tuning device that enables users to customize engine parameters, monitor exhaust gas temperatures (EGTs), and manage emissions components such as the DPF. It is designed to be a plug-and-play solution for diesel vehicle owners seeking performance enhancements and emissions system modifications. The device includes a PCH (Performance Control Hardware) board, an OBDII adapter, a pyrometer probe, a micro SD card, and mounting hardware.
The installation process involves mounting the Mini Maxx in the vehicle, connecting the power supply, routing the pyrometer cable, and configuring the software interface. The manual emphasizes the use of a 12V keyed ignition source to ensure the device is powered only when the vehicle’s ECM (Engine Control Module) is online. This approach minimizes potential conflicts with the vehicle’s factory systems and ensures stable operation.
Power Supply Integration
One of the most critical aspects of the Mini Maxx installation is the power supply configuration. The manual recommends using a 12V keyed ignition source to power the device only when the vehicle’s key is in the ON position and the ECM is active. This ensures that the Mini Maxx does not remain powered during extended periods when the vehicle is not in use, which could lead to unnecessary battery drain or interference with the vehicle’s factory systems.
To implement this setup, the installer must tap into a 12V ignition source that activates in tandem with the vehicle’s ignition system. The manual provides a list of commonly used ignition sources for various vehicle models, which can be accessed via the H&S Performance website. The power cable, which connects the OBDII adapter to the vehicle’s fuse box, is optional, as the device can be powered through the OBDII port or via the keyed ignition circuit.
Mounting and Hardware Setup
The Mini Maxx must be securely mounted within the vehicle to ensure stable operation and accessibility. The installation manual recommends using a universal windshield mount, which uses a suction cup to attach the device to the windshield. Alternatively, other mounting options are available, depending on the vehicle’s interior layout and the user’s preference.
The PCH board is typically installed in the engine compartment, where it can be connected to the pyrometer probe and other sensors. The pyrometer probe is designed to measure exhaust gas temperatures, and the manual suggests pre-turbo mounting for the most accurate EGT readings. The Mini Maxx supports dual pyrometer configurations, allowing users to monitor both pre- and post-turbo exhaust temperatures simultaneously. Additional probes must be purchased separately for this setup.
Sensor and Cable Installation
The installation of sensors and cables is a crucial step in the Mini Maxx setup process. The pyrometer cable must be routed along the edge of the engine bay, ensuring that it does not interfere with moving parts or heat sources. The manual recommends securing the cable in place to prevent vibration-induced wear or accidental disconnection. Detailed diagrams and vehicle-specific instructions are included in the manual, with additional guidance available on the H&S Performance website.
The HDMI cable, which connects the Mini Maxx to the OBDII adapter, serves as the primary communication line between the device and the vehicle’s onboard systems. This cable must be connected securely to ensure stable data transmission. The micro SD card, used for storing software updates and diagnostic data, should remain inserted in the device at all times except during internet-based upgrades.
Software Configuration and Interface
Once the hardware is installed, the Mini Maxx must be configured through its software interface. The device includes a graphical menu system that allows users to adjust settings such as background color, speedometer calibration, and diagnostic trouble code (DTC) management. The interface is navigated using up and down buttons, with changes confirmed by exiting the menu or selecting a specific option.
The speedometer calibration feature is particularly important for vehicles with non-stock tire sizes, as it ensures accurate speed readings. The manual instructs users to measure tire circumference and input the correct values into the Mini Maxx to maintain precise speedometer functionality. This is especially relevant for off-road or performance-oriented vehicles that use larger or modified tires.
DPF and Emissions System Configuration
The Mini Maxx is designed to accommodate various DPF and emissions system configurations. The manual provides specific instructions for users who intend to keep the DPF in place, remove it, or modify its functionality. For users who plan to retain the DPF, the device must be configured to recognize the presence of the filter and its associated sensors. This requires selecting the “PRESENT” option in the DPF/Exhaust Sensors menu.
Conversely, users who plan to remove the DPF must select the “REMOVED” option and accept the DPF disclaimer before proceeding with the installation. This configuration is necessary for vehicles where the DPF is not in use, as it prevents the vehicle from triggering emissions-related fault codes or entering limp-home mode.
In addition to DPF management, the Mini Maxx supports the installation of EGT sensors from the DPF system into the passenger-side exhaust manifold. This setup is detailed in the manual and can be accessed through the H&S Performance website for further information.
Diagnostic Trouble Code (DTC) Management
The Mini Maxx includes functionality for reading and erasing diagnostic trouble codes (DTCs). The micro SD card must be inserted into the device for this feature to operate, as it is required for both reading and clearing DTCs. The manual provides instructions for navigating the DTC menu, including how to view a list of detected codes and how to erase them from the system.
Users are advised to consult the Tech section of the H&S Performance website for a comprehensive list of DTC descriptions and their corresponding meanings. This information is essential for diagnosing issues and ensuring that the vehicle remains compliant with emissions regulations, particularly in regions with mandatory inspection and maintenance programs.
Internet Upgrades and Software Updates
The Mini Maxx supports internet-based software upgrades, which are managed through the micro SD card. The manual emphasizes that the card should only be removed for the purpose of performing updates, as it serves as the primary storage medium for the device’s software. Internet upgrades can be accessed through the H&S Performance website, where users can check for new firmware versions and custom tunes that are compatible with their vehicle model.
Users are encouraged to verify the availability of updates before installation and to follow the instructions provided on the website carefully. The manual also notes that H&S Performance regularly releases free updates and custom tunes for the Mini Maxx, which can enhance performance and compatibility with newer vehicle models.
Warranty and Support
The Mini Maxx comes with a warranty that is void if the product is purchased through unauthorized dealers, sold as used or refurbished, or bought below H&S Performance’s unilateral pricing policy. The manual includes a bill of materials that lists all the major components included in the package, such as the PCH board, pyrometer probe, micro SD card, OBDII adapter, and mounting hardware.
Users who encounter installation issues or require technical support can contact H&S Performance at 1-888-628-1730. The company also provides online resources, including installation guides, technical articles, and video tutorials, to assist users with the setup process. These resources are accessible through the H&S Performance website and are updated regularly to reflect the latest developments in diesel tuning and emissions management.
Conclusion
The H&S Mini Maxx is a powerful tuning device that offers a range of features for diesel vehicle owners, including EGT monitoring, DPF management, and software customization. Its installation requires careful attention to power supply integration, sensor placement, and interface configuration. By following the instructions provided in the official installation manual, users can ensure that the device operates reliably and efficiently.
The manual emphasizes the importance of using a 12V keyed ignition source to power the Mini Maxx only when the vehicle’s ECM is active. This approach minimizes potential conflicts with factory systems and ensures stable operation. The device also supports a variety of mounting options, allowing users to choose the most convenient location for their specific vehicle.
For users planning to modify their emissions systems, the Mini Maxx provides specific configuration options for managing DPF and EGT sensors. The device includes functionality for reading and clearing DTCs, which is essential for maintaining vehicle compliance and diagnosing issues. Software updates can be performed via the internet, ensuring that the device remains compatible with the latest vehicle models and tuning options.
Overall, the H&S Mini Maxx is a versatile and user-friendly tuning solution that can enhance the performance of diesel vehicles while maintaining compatibility with emissions systems. The installation process, while requiring technical knowledge, is well-documented and supported by extensive online resources, making it accessible to both experienced users and those new to diesel tuning.