Dual-Injection Fuel Delivery System: Overview

The dual-injection fuel delivery system consists of a fuel select switch (FSSW) circuit, the fuel rails, the fuel injectors, and a fuel injector interface module.

The fuel injector interface module controls the fuel injectors according to the demand from the powertrain control module (PCM). The fuel injector interface module enables the primary (forward) fuel injectors when in single-injection mode and enables both the primary (forward) and secondary (rearward) fuel injectors when in dual-injection mode. The injection mode is requested by the PCM through the FSSW circuit. The fuel injector interface module communicates the fuel injection mode status to the PCM on the communications network.