12 Position Rotary Trim Module (Boost/Fuel/Ign etc)

Master Calibration Instrument: 12-Position Rotary Trim Module

The 12-Position Rotary Trim Module is a specialized electrical component designed for real-time interaction with a standalone ECU integration. This module acts as an analog control knob, allowing the driver to select between 12 distinct pre-programmed map positions for variables such as boost levels, fuel enrichment, and ignition timing. It is a foundational component for professional tuning on RB26, 2JZ, and LS-swap builds, where a single “one-size-fits-all” map is insufficient for varying track conditions and fuel qualities. By providing deterministic feedback to the ECU, this module ensures that your detonation protection strategies are under direct, physical control.

Engineering Principles: Precision Stepped Voltage Logic

Unlike a standard potentiometer that outputs an infinitely variable voltage, this module utilizes a stepped detent system. Each of the 12 positions provides a precise, repeatable voltage value to the ECU’s Analogue Voltage Input (AVI). This Analogue-to-Digital interface ensures that the ECU can distinguish between Map 1 and Map 2 with absolute certainty, even in a high-vibration racing environment. The kit includes a matching set of Deutsch DTM-3 connectors (HT-031014), facilitating a professional harness integration that meets motorsport standards for durability and weatherproofing. This reliability is vital for maintaining Ignition Timing stability during map-switching events.

Operational Benefits: Versatile Map Trimming

Integrating a 12-Position Rotary Trim Module into a Haltech Elite or Nexus system allows the tuner to implement a multi-stage “Driver Correction” map. Common applications include selecting between different fuel octanes (e.g., 91, 93, E85), adjusting closed-loop boost control targets for different track segments, or managing traction control sensitivity levels. The module includes 2 position decals, allowing the builder to clearly label the knob for fuel, ignition, or boost trimming. In a fuel map calibration workflow, this module allows the driver to proactively adjust engine behavior to find the Maximum Brake Torque (MBT) timing based on real-time feedback from the seat.

Installation and Professional Integration

This rotary module is a universal component and includes the DTM-3 plug and pins for seamless integration into a custom wiring harness. Installation requires a simple 3-wire connection: 5V Supply, Signal Out, and Signal Ground. During setup, the tuner assigns the module to an AVI channel and uses the 12-position lookup table in the software to define the function of each click. The robust internal switch is rated for high-cycle use, ensuring that the signal does not drift over years of service. It is a mandatory requirement for any build utilizing a Haltech Dual or Triple Switch Panel and provides a factory-plus aesthetic to the cockpit instrumentation.

Technical Specifications Table

Summary & Includes

The 12-Position Rotary Trim Module is the professional’s instrument for on-the-fly map interaction. Includes: 1 x 12-Position Module, 2 x Position Decals, and 1 x Matching DTM-3 Connector Set. Note: Essential for implementing selectable boost, fuel, or traction logic.