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SMT-FTX Technical Manual - Map Switching

SMT-FTX TECHNICAL MANUAL

Perfect Power Online Manuals.

 

Support for your SMT-FTX Unit.

MAP SWITCHING

The SMT-FTX has two complete maps A (B). That is to say that you can switch between two different tuned maps while driving. It is possible to have one map for fuel-economy, and the other for performance. Or use the maps for different weather conditions. The Maps can be switched automatically from the SETPOINT procedure, or from the hardware input (MAPSW, pin 8). The parameters and calibration are not switched. The maps can be ‘locked’ in to a fixed position from the PC for tuning and downloading until the next power-up. When the map switching is enabled (System Definition, Setp. Mapsw En) the hardware switching (pin 8) will no longer function.


NOTE:     Please make sure that you have a valid tune map in map “B” before you flip the switch.


The two tune maps can be invoked by:

 

 

MECHANICAL SWITCH

 

There is an option to connect (pin 8/14) an external mechanical switch to the SMT-FTX to enable it to do map switching. Without this mechanical external switch, the unit will default on power up to Map A (open pin). Should the mechanical switch be installed, the unit will power up and run on the map selected. The transition between maps switching is seamless and can be performed while the vehicle is in operation, provided both maps are loaded.

 

SMT-FTX Fuel Tuner - Wiring Diagram for Mechanical Switch

FIGURE 10 WIRING DIAGRAM FOR MECHANICAL SWITCH

 

 

PC MAP SWITCH

 

This is required when a blank unit is loaded with a previous established map. It is advisable to load both maps. To facilitate this, the PC can change the Selected Map, regardless of what the external mechanical switch is presently set to. However, as soon as the unit is reset or is powered up, the SMT-FTX will revert back to the external mechanical switch setting. By changing the software map switch, the unit will switch maps, even while the vehicle is in use. The PC FREEZES the selected map and renders any other map-switching mute.

 

 

AUTOMATIC SWITCHING

 

The SETPOINT feature can switch the operating maps. This is done from the FUNCTION level in the SET-POINT procedure. A FALSE evaluation selects map A. Mechanical map switching will no longer function once automatic map switching is enabled.

 

For this feature to work the following items must be set:

 

Enable SYSTEM DEF, SETPOINT MAP SWITCHING ENABLED
Set Any of the SETPOINT features FUNCTION, ENABLE MAP SWITCHING

 

SMT-FTX Fuel Tuner - Automatic Map Switching