Some ECUs have more pins than the Smart Sensor Simulator 2 can accommodate. To remedy this, the Passive Resistor Network provides simple fixed resistances to emulate connectivity to devices like coil solenoids. This gives an ECU the sense that those actuators are connected, thus eliminating the fault codes associated with missing connections. The passive resistor network has surface mount resistors that are easy and inexpensive to work with. The schematics are available for customers to understand the pin outs.