MAP/BARO calibration
MAP sensor offset
Can be used to calibrate the MAP reading to match a known air pressure.
BARO sensor offset
Can be used to calibrate the BARO reading to match a known air pressure.
Note: This only applies when the internal MAP-sensor is used.
Voltage calibration
VBAT calibration
Can be used to calibrate the battery voltage readings.
AIN temperature compensation
Optional setting that corrects analog input voltages at high ECU temperatures.
On MaxxECU MINI and other GEN1 hardware with SW14 or newer, the correction is applied automatically at the firmware level; no configuration needed here.
•Disabled
•NXP diodes (WV4) (large drift)
•ST diodes (N88/88Y) (small drift)
•ON diodes (LD3) (rare)
Note: There is no need to enable this compensation unless your CPU temperature regularly exceeds 60°C / 140° F. For most installations, the effect is negligible - but under extreme under-hood conditions, enabling this feature improves accuracy and signal stability.
To ensure consistent and reliable sensor readings across the full operating range, MaxxECU applies temperature-based voltage compensation for selected analog inputs.
Modern ECUs operate in environments with wide temperature swings: From cold starts to extreme engine bay heat. These conditions can introduce minor, but predictable, temperature-induced shifts in internal reference voltages and analog signal paths.
While these shifts are physically normal in all electronics, MaxxECU’s compensation logic dynamically corrects for them based on the internal CPU temperature, maintaining analog input accuracy even under thermal stress.
This feature does not alter sensor calibration - it simply corrects small voltage drift caused by internal heat, ensuring high precision at all temperatures.
Determining the diode used in your hardware
Note: Due to hardware variation, the exact diode type in your ECU can't always be determined without opening the unit. For verified information, contact MaxxECU support with your ECU's serial number.
•If you experience voltage drift, you most likely have the NXP diode; activate it and test. If the voltage then drifts in the wrong direction, try the ST compensation instead.
•GEN1 MINI and other MaxxECU GEN1 units with SW14 or newer have automatic compensation enabled.
Trigger input 0V calibration
calibrate trigger inputs
Used to calibrate the trigger "zero voltage", available on all units, but mostly used on some MaxxECU MINI when the trigger voltage rest input is not showing 0.0V. Press calibrate button to zero the voltage.
