IO 12 Expander – 12 Channel with Plug & Pins Kit (CAN ID – Box B)

Custom Loom Expansion: IO 12 Expander with Plug & Pins (CAN ID – Box B)

For the custom harness specialist, modularity and signal integrity are the two highest priorities. The IO 12 Expander- 12 Channel with Plug & Pins Kit is a high-performance CAN expansion module designed for builders who are constructing their own wiring looms from scratch. Assigned with CAN ID – Box B, this module provides 12 configurable channels (4 DPO, 4 DPI, 4 AVI) and includes the matching 24-pin Tyco plug and pins. It is the professional standard for adding secondary telemetry and output control to LS-swap, 2JZ, and RB26 builds within a standalone ECU integration project.

Engineering Principles: Modular CAN Architecture

The IO 12 Expander Box B allows the ECU to process up to 12 additional data channels via the vehicle’s CAN bus backbone. This Analogue-to-Digital interface hub is vital for offloading low-priority monitoring—such as oil pressure, differential temp, or wheel speed—from the main ECU’s high-speed timing pins. By providing the module with loose plugs and pins, Haltech ensures that the harness integration can utilize Milspec Tefzel wiring to the exact length required, minimizing EMI (Electromagnetic Interference) and eliminating the failure points of butt-splices. The “Box B” identifier allows this unit to live on the same network as a Box A expander, providing up to 24 additional channels of I/O.

Operational Benefits for Complex Calibrations

Integrating an IO 12 Expander Box B into your Haltech Elite or Nexus system enables advanced closed-loop boost control and power-management maps. For example, the tuner can use the DPI channels to monitor multi-stage nitrous activation or turbocharger RPM. In a fuel map calibration scenario, the AVI channels provide the resolution needed for 4D compensation tables, such as fuel temperature or intra-cooler pressure. This level of granularity is essential for achieving Maximum Brake Torque (MBT) timing safely, as the ECU has a complete digital map of the engine’s operational state. The module is fully compatible with the iC-7 Digital Display, providing clear feedback to the driver.

Installation and Integration Requirements

This kit includes the IO 12 Expander (Box B), the matching 24-pin Tyco plug and pins, and a 300mm Elite CAN cable. Installation requires the use of a professional automotive crimp tool to terminate the 24 circuits to the custom harness. The module should be mounted to a rigid part of the chassis, ideally in the cabin to protect the electronics from extreme thermal stress. It is Plug ‘n’ Play compatible with an Elite ECU CAN port and is configured via Haltech’s NSP or ESP software. This hardware represents the “zero-compromise” approach to ECU expansion, providing the electrical infrastructure needed for high-stakes competition.

Technical Specifications Table

Summary & Includes

The IO 12 Expander with Plug & Pins (Box B) is the definitive component for custom-harness I/O expansion. Includes: 1 x IO 12 Expander (Box B), 1 x 24-Pin Tyco Connector/Pins Set, and 1 x Elite CAN Cable. Note: Specifically designed for builders constructing their own modular engine looms.