13-24
MPROP: Rail pressure control valve
*
: Contact Bosch Service Station for repair.
Symptoms
Engine does not start
Engine hard to start
Engine knocks
Engine output inconsistent
Engine output not sufficient
Engine maximum speed too high
Engine idling unstable
Engine stalls immediately after start
Engine does not reach maximum speed
Engine does not stop
Fuel supply insufficient
Engine control warning lamp illuminates
Reference
Gr
Possible causes
Defective electronic control fuel system O
Supply pump
Defective feed pump O O O O
*
Defective sealing of supply pump overflow valve O O O O
*
Defective MPROP O O O O O
Defective base supply pump O O O O
*
Common rail
Common rail pressure sensor open-circuited,
short or intermittent connection; defective sensor
OO OO O O
Pressure limiting valve malfunction O O O
*
Incorrect injector
fuel injection
Defective injector magnetic valve O O O O O
Defective injector O O O O
*
Gauze filter clogged O O O O O O
Fuel filter clogged O O O O
Water separator clogged O O O O
No fuel in fuel tank O
Fuel pipe clogged and fuel leak from joint O
Air or water in fuel system O O O O
Poor quality fuel is used O O O O
Fuel leak from high-pressure joint O O O O O
Engine control
Incorrectly adjusted accelerator pedal stopper bolt O O
Defective accelerator position sensor O O O
Engine speed sensor and cylinder recognition sensor open-circuited,
short, or intermittent connection
OO O
Boost pressure sensor open-circuited, short, or intermittent connec-
tion
OOO O O
Water temperature sensor open-circuited, short, or intermittent con-
nection
OO O
Defective fuel injection volume adjusting resistor O O O
Idling speed adjustment knob intermittent connection O O O
Fuel pipe and hose cracked O
TROUBLESHOOTING <MITS
UBISHI 6M70 FUEL SYSTEM>
To Next Page
Loading...
