Guide: EDC15c2 limp stop mode Faults

[cully]

The appearance of certain faults in the injection system leads to the illumination
of the engine diagnostic LED.

The engine diagnostic LED illuminates if a fault occurs on the following
components or information:
· capacitor N°1 voltage,
· capacitor N°2 voltage,
· high pressure fuel sensor,
· high pressure fuel monitoring,
· fuel pressure regulator/sensor coherence,
· accelerator pedal sensor N°1,
· accelerator pedal sensor N°2,
· inlet manifold pressure sensor,
· air flowmeter,
· stability of the ECU 5 volt supply,
· exhaust gas recycling function (regulation),
· high pressure fuel regulator,
· diesel injector fault (1 - 4),
· inlet pressure,
· telecoding,

DOWNGRADED OPERATING MODES
The injection system manages the following downgraded modes:
· an operating mode with a reduced fuel flow, (Limp mode)
· the other mode leads to the engine being stopped immediately. (Stop mode)

REDUCED FUEL FLOW (Limp mode)

This downgraded operating mode limits the fuel flow and the engine speed
cannot exceed 2200 rpm (with the injected fuel flow being less than 30 mm3).
The injection system switches to "reduced flow" mode when a fault is present on
one of the following components:
· high pressure fuel sensor,
· fuel pressure regulator/sensor coherence,
· accelerator pedal sensor N°1,
· accelerator pedal sensor N°2,
· inlet manifold pressure sensor,
· air flowmeter,
· exhaust gas recycling function (regulation),
· high pressure fuel regulator,
· stability of the ECU 5 volt supply,
· diesel injector fault (1 - 4),
· inlet pressure,
· turbocharging function.


STOPPING THE ENGINE (Stop mode)

The system stops the engine immediately when a fault is present on one of the
following components:
· Eprom in the injection ECU
· engine speed sensor
· capacitor N°1 voltage
· capacitor N°2 voltage
· high pressure fuel monitoring