ecu supply settings
Only available for MaxxECU GEN2 RACE
12V 1 is always ECU Supply. 12V 1 must always be present to run the engine, but the ECU can be ON, communicate with MTune, CAN bus, and control all inputs/outputs with other 12V inputs active, and the 12V 2 input off.
For most setups, only 12V 1 is required. The other two inputs can be left unconnected or connected to the same 12V source.
12V 1, 12V 2, and 12V 3 have separate ideal input diodes that prevent current from flowing from one input to another.
Supply functions for 12V 2/3:
ECU Supply: Input is used to supply operating current to the ECU, H-bridge drivers, and 12V output drivers. Powering on these inputs will put the ECU in full operating mode.
Ignition key 12V: This is an input that powers up the ECU and acts as the key-on signal for power hold circuits that lets the ECU close the main supply relay. NOTE: The use of the ignition key signal is optional and only needed if you want the ECU to be powered on a time after turning off the ignition key.
Constant 12V: Charges the internal timekeeping capacitor. Only needed if you want correct date/time(Real Time Clock) in logs on vehicles parked for a long time. The ECU will be off if 12V is only available on this pin.
For MaxxECU GEN2 information, see MaxxECU GEN2 pinout and MaxxECU Quickguide and Wiring diagram download.
12v 2 supply function
Defines the function of the 12V Supply 2 input on the MaxxECU GEN2 RACE .
12v 3 supply function
Defines the function of the 12V Supply 3 input on the MaxxECU GEN2 RACE.
Note: 12V Supply 3 cannot be used as an ECU supply input, only as an ignition key input or constant 12V input for charging the internal supercapacitor.
