Volvo TAD650VE User Manual

Diagnostic Trouble Codes Group 30: Electrical system
134
Fault tracing
FMI 0
Conditions for fault code:
Rail pressure controller integral part too low.
Possible reason:
• MPROP stuck open due to mechanical fault or an
open circuit in MPROP electrical wiring.
• Faulty rail pressure sensor.
• An injector does not open.
Suitable action:
1. Check contact pressure in socket 12 and 16 in en-
gine connector A.
2. Check MPROP cables and connectors.
3. Check function of rail pressure sensor.
4. Change MPROP valve.
5. Check if an injector is faulty.
FMI 1
Conditions for fault code:
Rail pressure controller integral part too big. High pres-
sure leakage detected.
Possible reason:
• High pressure leakage.
• Faulty rail pressure sensor.
• MPROP closed or partly closed or out of charac-
teristic,
• Rail pressure release valve stuck open or unwant-
ed opening.
• An injector is stuck open.
• Faulty high pressure pump.
Suitable action:
1. Check fuel pipes for leakage (high pressure pipes,
suction pipes, return pipes).
2. Check function of rail pressure sensor (see MID
128, PID 164).
3. Change the rail pressure release valve.
4. Check MPROP cables and connectors.
5. Change MPROP valve.
6. Check if an injector is faulty.
7. Check both high pressure pumps (see workshop
manual Group 21-26).

Volvo TAD650VE Specifications

General

Brand	Volvo
Model	TAD650VE
Category	Engine
Language	English