Trooper LTD 4WD V6-3.5L (2002)
Fuel Injector: Description and Operation
Wiring Diagram
Fuel Injector / Circuit Description
The powertrain control module (PCM) has six individual injector driver circuits. Each controls an injector. When a driver circuit is grounded by the
PCM, the injector is activated. The PCM monitors the current in each driver circuit. The voltage on each driver is monitored to detect a fault. If the
voltage is not what the PCM expects to monitor on the circuit, a DTC is set. This DTC is also set if an injector driver is shorted to voltage or if there is
an open circuit.