Mid 128, Psid 96; Rail Pressure System - Volvo TAD650VE Workshop Manual

Group 30: Electrical system

MID 128, PSID 96

Rail pressure system

MID 128: Engine control unit
FMI 0:
FMI 1:
FMI 4:
FMI 7:
FMI 12: Faulty unit or component.
FMI
0, 1, 4, 7, 12
Fault indication
DCU:
CIU:
Lamp status
FMI 0, 12:
FMI 1, 4, 7:
Flash code
Electrical fault: 8.3
Value fault:
Symptom
FMI 0:
FMI 1, 7, 12:
FMI 4:
Diagnostic Trouble Codes
The sensor value is valid but above the nor-
mal working range.
The sensor value is valid but below the nor-
mal working range.
The voltage is less than the normal value or
is short circuited to lower voltage.
Mechanical fault. The system responds in-
correctly.
Fault code explanation
Fault in rail pressure circuit
Engine warning in DCU display.
None
Yellow lamp
Red lamp
None
Engine derated: engine speed limita-
tion (1100 rpm). Full fuel flow delivery.
Limp home with pressure relief valve
opened.
Engine derated: engine speed limita-
tion (1100 rpm). Fuel pressure limita-
tion (800 bar). Engine torque reduc-
tion.
Engine derated: engine speed limita-
tion (1100 rpm). Fuel pressure limita-
tion (800 bar). Engine torque reduc-
tion. Engine shut off or difficult to
start.
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