IO 12 Expander – 12 Channel with Flying Lead Harness Kit (CAN ID – Box B) Length: 2.5m (8′)

Turn-Key Network Expansion: IO 12 Expander Kit (CAN ID – Box B)

When the complexity of a performance vehicle exceeds the capacity of the main engine management system, modular expansion is the only professional solution. The IO 12 Expander with Flying Lead Harness Kit is a comprehensive package designed to add 12 fully configurable channels to your CAN Bus network. This kit features the CAN ID – Box B expander module and a 2.5m (8ft) flying lead harness. This is the definitive upgrade for builders of RB26, 2JZ, and multi-sensor LS-swap projects who require an all-in-one solution for adding auxiliary telemetry, traction control, and power-management functions within their standalone ECU integration.

Engineering Principles: High-Density CAN Topology

The IO 12 Expander Box B operates as a discrete node on the vehicle’s high-speed data bus. It provides 4 Digital Pulsed Outputs (DPO), 4 Digital Pulsed Inputs (DPI), and 4 Analogue Voltage Inputs (AVI). This Analogue-to-Digital interface hub digitizes real-world sensor data at the source and transmits it over CAN, reducing the risk of signal degradation. The 2.5m flying lead harness is a calculated design feature, allowing the expander to be mounted in the cabin or firewall while providing enough wire length to reach distant sensors like wheel speed or differential temp. This kit facilitates a robust harness integration that maintains the high signal-to-noise ratio required for accurate fuel map calibration.

Operational Benefits: Complete System Scalability

By using the “Box B” identifier, this kit allows the tuner to expand their I/O capacity beyond the first expander (Box A), potentially adding up to 24 additional channels to a single system. In high-power 2JZ drag racing, this allows for the monitoring of every vital sign—from fuel pressure across multiple rails to individual turbo speeds. This deterministic feedback is foundational for closed-loop boost control and advanced detonation protection logic. The DPO channels provide the switching power for solenoids and relays, while the AVI channels ensure that the iC-7 Digital Display receives accurate data for every critical engine parameter.

Installation and Professional Integration

This kit provides the ultimate convenience for harness integration. It includes the IO 12 Expander, a 2.5m/8ft flying lead harness, and a 300mm Elite CAN cable. The flying lead harness is clearly labeled, allowing the installer to terminate each channel directly to the intended sensor or output with motorsport-grade connectors. The system is Plug ‘n’ Play compatible with an Elite ECU CAN port and is fully supported by Haltech’s NSP and ESP software suites. The robust, weatherproof casing and high-temperature wiring ensure that your expansion network remains reliable under the most demanding racing conditions, providing a foundation for winning performance.

Technical Specifications Table

Summary & Includes

The IO 12 Expander Kit (Box B) is the definitive turn-key solution for massive ECU I/O expansion. Includes: 1 x IO 12 Expander, 1 x 2.5m Flying Lead Harness, and 1 x Elite CAN Cable. Note: Combine with a Box A module to unlock up to 24 additional I/O channels.