{l- A: Transistor On B: Injector Open A I Current (A) WAVEFORMS - INJECTOR PATTERN TUTORIAL VOLTAGE-CONTROLLED TYPE Fig. 1: Injector Driver Types - Current and Voltage 1 1987 Ford LTD Crown Victoria l +8 +5 Solenoid Resistor Low High Resistance Resistance Injector lnlector ECU ECU CURRENT-CONTROLLED TYPE +B Low Resistance lnieclor ECU i (1 3k N H W / A B A E A {l 5 50613053 2003 Mitchell Repair Information Company, LLC