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Geotab IOX-CAN Documentation

IOX-CANIOX-CAN Drawing.png

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Interfacing With Third-Party Devices

The IOX-CAN integrates third-party data with the MyGeotab software — allowing supplementary fleet data to be collected and consolidated in one place by the user.

Customers and partners can also transmit data through the Geotab® GO device by using the Third-Party Data Protocol ( on our private CAN Bus via the IOX-CAN. No initial handshake is required; if third-party data is in the correct format, the GO device will begin processing and transmitting the data to MyGeotab.

Additional Data Collection Can Include:

For more information regarding Third-Party Devices and data collection through Geotab Partners, please visit:

IOX Specifications and Installation

Hardware Technical Specifications


40 g


Keyed mini-USB type-B plug:

Daisy chain power & CAN in

Keyed mini-USB type-B socket: Daisy chain power & CAN out

Molex 6-pin male connector:

1. Yellow - CAN positive

2. Blue - CAN negative

3. Black - Ground

4. Grey - Terminating resistor enable — jumper pin A

5. White - Terminating resistor enable — jumper pin B

6. Red - Power output


Overall length: 500 mm L

Widest point: 36 mm W × 16 mm H


External third-party CAN

Terminating resistor enable (jumper input)

Third-party device power supply


Black, moisture-resistant thermoplastic overmold

Power Output

1 A @ 12 V

Current Rating

Operating mode: 30 mA

Sleep mode: 0.3 mA

Temperature Rating

−40 ℃ to +85 ℃


External third-party CAN: 250 or 500 kbps

CAN: 500 kbps (for daisy chaining)

Third-Party Interface Current Output Limit

1 A

Compatible Firmware

GO6®:101.4.XX or higher &

GO7®:105.2.XX or higher

*Note: When installed in a vehicle, the supply voltage level for both IOX-CAN and third-party devices will be derived from that of the car battery.

Data Transmission Rates

The third-party CAN interface adjusts its baud rate based on the baud rate of the CAN bus to which it is connected (either 250 kbps or 500 kbps). A minimum of one message must be received by the IOX-CAN in order for the baud rate to be set. Shorting jumper pin A and jumper pin B together enables the internal 120 Ohm terminating resistor (may be required if the application itself is not already terminated).

Installation Instructions

Professional Installation Required  Installation of the IOX-CAN requires the installer to have sufficient technical knowledge and expertise for mobile device installation and integration into modern vehicles, i.e. Certified Geotab Installer certification or equivalent.

WARNING! Prior to IOX-CAN installation, read and follow GO device installation instructions ( to both verify any existing GO device installation is correct and that you are qualified to complete this IOX-CAN installation. Incorrect installation of either the GO device, and/or IOX-CAN can result in loss of vehicle control and serious injury.

WARNING! Prior to IOX-CAN installation, read and follow important safety information, including limitations of use, located following these installation instructions. Always read and follow all safety information to prevent loss of vehicle control and serious injury.


Start with the Geotab GO device unplugged from the vehicle. Remove the IOX expansion port cover on your GO device.


Connect your third-party device to the 6-pin Molex connector on the IOX-CAN.

WARNING! The molex 6 pin connector of the IOX-CAN must ONLY be connected to a third party device. Connecting the molex 6 pin connector to a vehicle's internal communication network can cause interference that may result in unexpected vehicle behavior and lead to vehicle damage and/or serious injury or death.


Plug in the 90° USB connector of the IOX to the GO device. Secure the USB connector using a zip tie. Avoid overtightening as it can damage the USB connector.

Note: The USB connector can only be inserted in one orientation (see image).


Once your connections to the IOX-CAN wiring have been made, connect the GO device and immediately start the vehicle. The GO device will enter debug mode.


Please verify that the device is communicating correctly. Using a PC or smart phone, navigate to

Fill in your name, company, and the Geotab GO device serial number (found at the bottom of the device) and click on Log Install.


You will now see a screen that displays the current status of the device. If the device is communicating correctly, you will see GREEN lettering with the last valid GPS record. If the text appears in RED, the device is unable to communicate and you must verify the installation.

Termination Shunt IOX V2 Housing.png

You may notice your IOX comes with a termination shunt installed in the expansion port. If you are installing more than one IOX in a daisy chain you will need to remove the shunt from each device in line, with the exception of the last IOX connected. That shunt must remain in the last IOX and should be secured with a zip tie.

The use of the shunt in the last IOX is necessary for the GO Device to detect and configure the IOX as effectively as possible.

NOTE: Failing to install the shunt in the last IOX could affect IOX communication. It is recommended that you secure the shunt using a zip tie if not already done.


To log temperature every five minutes from the Valor TempTrac solution, apply the following custom parameter to the GO device using the MyGeotab software:

<GoParameters><Parameter Description=" Log Reefer Temp Periodically" Offset="180" Bytes="02"/></GoParameters>

This functionality requires GO device firmware XXX.20.43 or higher.

Important Safety Information and Limitations of Use

For the latest version of the Limitations of Use, please visit:

WARNING! Do not attempt to install, configure or remove any product from any vehicle while the vehicle is in motion or otherwise in operation. All installation, configuration or removal must be done only in stationary vehicles which are securely parked. Attempting to service units while being operated could result in malfunctions or accidents, leading to death or serious personal injury.

WARNING! All in-vehicle devices and related cabling must be securely fastened and kept clear of all vehicle controls, including gas, brake and clutch pedals. You must inspect devices and cabling on a regular basis to ensure all devices and cabling continue to be securely attached. Loose cabling or devices may impede the use of vehicle controls, resulting in unanticipated acceleration, braking or other loss of vehicle control, which could lead to death or serious personal injury. Improperly fastened in-vehicle devices may detach and impact operators upon sudden acceleration or deceleration, which may cause injury.

WARNING! If at any point after an in-vehicle device is installed a warning light illuminates on the vehicle dash or the vehicle stalls or has a marked drop in performance, shut off the engine, remove the device, and contact your reseller. Continuing to operate a vehicle with these symptoms can cause loss of vehicle control, and serious injury.

WARNING! Your in-vehicle devices must be kept clear of debris, water and other environmental contaminants. Failure to do so may result in units malfunctioning or short-circuiting that can lead to a fire hazard or vehicle damage or serious injury.

WARNING! Do not attempt to remove the devices from the vehicle in which they are originally installed for installation in another vehicle. Not all vehicles share compatibility, and doing so may result in unexpected interactions with your vehicle, including sudden loss of power or shutdown of the vehicle’s engine while in operation or cause your vehicle to operate poorly or erratically and cause death or serious injury and/or vehicle damage.

NOTICE — This product does not contain any user-serviceable parts. Configuration, servicing, and repairs must only be made by an authorized reseller or installer. Unauthorized servicing of these products will void your product warranty.

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