System Tests: Notes

Application	Test
Vehicle Reference Voltage	Used To Diagnose Vehicle Reference (VREF) malfunctions.
Malfunction Indicator Light	Used To Diagnose Malfunction Indicator Light (MIL) malfunctions.
Intermittent	Used to diagnose intermittent concerns.
Fuel Delivery System	Used to diagnose fuel delivery concerns
PCV System	Used to diagnose PCV system.
PCM Power Relay	Used to diagnose PCM Power Relay failure.
Fuel Pressure Regulator	Used to diagnose fuel pressure regulator function.
Fuel Pump Inspection	Used to diagnose fuel pump function.
Fuel Line/Fuel Pressure Hold Inspection	Used to diagnose fuel line pressure and pressure hold.
Fuel Injector Inspection	Used to diagnose fuel injector concerns.
EGR Valve	Used to diagnose EGR valve.
EGR Vacuum Regulator Solenoid Inspection	Used to diagnose EGR vacuum regulator solenoid.
Differential Pressure Feedback EGR	Used to diagnose Differential Pressure Feedback EGR (DPFE) sensor.
No Start	Used to diagnose No Start condition.
Ignition Scope Test	Used to diagnose ignition coil malfunction and misfires.