Mitsubishi MOTORS CARISMA 1996, Service Bulletin

Page: 127 / 232

6
[A]
Range of check
•
Following conditions once detected after engine
is started.
(1) Engine speed: 1,000 r/min or more
(2) Fuel pressure: 2 MPa or more
•
Engine in operation
Set conditions
•
Fuel pressure is 6.9 MPa or more for 4 seconds.
or
•
Fuel pressure is 2 MPa or less for 4 seconds.
•
Malfunction of the fuel pump (high pressure)
•
Malfunction of the fuel pressure regulation
(high pressure)
•
Clogged high pressure fuel lines
[B]
OK NG MUT-II Data list
74 Fuel pressure sensor
•
Ignition switch: ON
OK: 0 - 8 MPa
NG
MUT-II Data list
74 Fuel pressure sensor
•
Engine speed kept at
2,000 r/min for 15
seconds or more
OK: 6.9 MPa or less
•
Replace the high
pressure regulator.
(Regulator stuck)
•
Replace the high
•
Pressure return pipe.
(Pipe clogged)
OK
MUT-II Data list
74 Fuel pressure sensor
•
Engine: Run at idle for
3 minutes or more.
OK: 4 MPa or more
NG
OK
•
Replace the fuel pump
(high pressure). (Pump
delivery pressure
insufficient)
•
Replace the high
pressure regulator. (Fuel
leakage at return side)
Erase diagnosis code No.
56. (The cause is in entry
of air into the high
pressure fuel passage.
Faults are considered to
have been eliminated by
racing the engine at 2,000
r/min.)
Check trouble symptom.
OK
While carrying out
intermittent malfunctions
simulation test (refer to
Group 00 - POINTS TO
NOTE FOR INTERMITTENT
MALFUNCTIONS), check for
sudden change in input
voltage to the fuel pressure
sensor/engine ECU.
NG
NORMAL
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