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MaxxECU online help


All four individual wheels speed from stock ABS into MaxxECU traction system.



Tacho (RPM).

Coolant temp (CLT).

Warning light (CEL).

Battery warning light.

Speedometer (vehicle speed).

Oil pressure light, see example below.

ABS + power steering works.

Odometer (needs vehicle speed sensors).

Oil pressure meter set to 12/20 when engine is started.


Not working/issues.

Oil pressure meter shows 3/4 all the time.


Confirmed to work models

Denso N3H8 18 881F, 279700 - 2286 (0022861).




MTune 1.150

Added coding support for the N3J1 ECU.


MTune 1.149

Added "coding" option.


MTune 1.148

Changed the behavior of the Oil Pressure warning light in dash, to use the Engine Oil Pressure value instead of a user table, see below.


MTune 1.142

Wheel speed correction function added.


MTune 1.140

Added to the Tachometer output value presentation function.


MTune 1.129

Fix for some RX8 showing an ABS warning light.


MTune 1.127

Odometer/oil pressure meter update in.


MTune 1.122

Official support.




Arrow explanation

Green (light): Working.

Green (dark): Working (but not controlled by CAN).

Blue: Not ECU controlled.

Orange: Partly controlled by MaxxECU.

Yellow: Turned off.







1. wire an oil pressure sensor to any available AIN (0-5v), set to engine oil pressure, select calibration (must be calibrated in kPa).


Automatically, over 1500 engine RPM AND oil pressure below 200kPa, the warning light will indicate.


Note: If no Engine oil pressure channel is selected in MTune, the oil pressure light in dash is OFF.



Wheel circumference must always be calibrated using an OEM CAN protocol


When we calibrate the wheel speeds from an OEM vehicle (to make an OEM CAN Protocol), we always use the stock wheel sizes, so to get correct wheel speeds within MaxxECU, you must calibrate your wheel dimensions, since they are used to show you the correct speed in MaxxECU.