GJP/CSG CAN IO Box Download (FRS GT86 BRZ GR86)

This page applies for Flex Fuel kits, oil pressure, fuel pressure, data logging addons… (Note if you just received your IO box kit / FlexFuel kit, they are all preconfigured and with the latest firmware when shipped. no need for reflashing).

GEN2 GR86/BRZ (22+) Instructions:

GJP/CSG IO BOX Install GEN2 (FlexFuel)(Oil Pressure)(Fuel Pressure) V1.75 Instructions

GJP IO BOX Install GEN2 (FlexFuel)(Oil Pressure) V1.0 Instructions (Deprecated as of 5/12/24 , any kits shipped after this date use Instruction v.1.5)

GEN1 FRS/BRZ/GT86 (13-20) Instructions:

GJP/CSG IO BOX Install GEN1 (Flex Fuel)(Oil Pressure)(Fuel Pressure) V1.75 Instructions

GJP/CSG IO BOX Install GEN1 (Flex Fuel)(Oil Pressure)(Fuel Pressure) V1.0 Instructions (Deprecated as of 5/12/24 , any kits shipped after this date use Instruction v.1.5)

How to Depin/Repin Add-on and Additional Options for IO BOX Instructions:

GJP/CSG IO BOX Pins Instructions & Pinout

FIRMWARE for IO Box (does not apply to MINI-IO BOX):

Click here for video on how to flash firmware on the IO Box

Download computer app:

GJP_Flash Download

https://www.geraldjustprojects.com/wp-content/uploads/2025/04/IO_BOX_V3_0_2.zip

Firmware: 3.0.2

The following changes have been made:

Increase current limit for the high current output for the boost control solenoid

IO_BOX_V3_0_2 Download

Firmware: 3.0.0

The following changes have been made:

Introduced diagnosis LED for those boxes with the LED indicator
Introduced UDS like service for further compatibility with obd2 readers
Added more things to output on passive to OBD2 port like wheel speeds, gear position etc. (use v3 files for racechrono or AIM software for further details.)

IO_BOX_V3_0_0_GEN1_GEN2 Download

Firmware: 2.0.6

The following changes have been made: