User Manual

Chapter 13

BOSCH HDI EDC 15C2 INJECTION SYSTEM AND PARTICLE FILTER

128

VII - DISPLAYING FAULTS - DOWNGRADED OPERATING MODES

A - DISPLAYING FAULTS

The appearance of certain faults in the particle filtration system leads to the

illumination of the engine diagnostic LED.

The engine diagnostic LED illuminates when a fault is present on one of the

following components or items of information:

• differential pressure sensor,

• exhaust gas temperature sensors (upstream and downstream of the catalytic

converter),

• particle filter clogged,

• particle filter punctured.

B - DOWNGRADED OPERATING MODE

The injection system controls the following downgraded mode: an operating

mode with reduced fuel flow.

C - REDUCED FUEL FLOW

This downgraded operating mode limits the fuel flow such that the engine speed

cannot exceed 2200 rpm under any circumstances (and the injected fuel flow

remains less than 30 mm

The injection switches to "reduced flow" mode when one of the following

components is faulty:

• particle filter clogged,

• particle filter punctured,

• exhaust gas temperature sensors (upstream and downstream of the catalytic

converter) (*),

• differential pressure sensor (*).

(*) 200 km after the fault appears.

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