TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-139
C
D
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F
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A
EC
5.
CHANGE ENGINE OIL
1.
Stop the engine.
2.
Change engine oil.
NOTE:
This symptom may occur when a large amount of gasoline is mixed with engine oil because of driving
conditions (such as when engine oil temperature does not rise enough since a journey distance is too
short during winter). The symptom will not be detected after changing engine oil or changing driving con-
dition.
>> INSPECTION END
6.
CHECK FUEL PRESSURE
Check fuel pressure. (Refer to
EC-80, "Fuel Pressure Check"
.)
OK or NG
OK
>> GO TO 9.
NG (Fuel pressure is too high)>>Replace fuel pressure regulator, refer to
EC-80, "FUEL PRESSURE
CHECK"
. GO TO 8.
NG (Fuel pressure is too low)>>GO TO 7.
7.
DETECT MALFUNCTIONING PART
1.
Check the following.
–
Clogged and bent fuel hose and fuel tube
–
Clogged fuel filter
–
Fuel pump and its circuit (Refer to
EC-715, "FUEL PUMP"
.)
2.
If NG, repair or replace the malfunctioning part. (Refer to
EC-80, "FUEL PRESSURE CHECK"
.)
If OK, replace fuel pressure regulator.
>> GO TO 8.
8.
CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1.
Start engine.
2.
Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “DATA MONITOR (SPEC)” mode, and make sure that the
each indication is within the SP value.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 9.
9.
PERFORM POWER BALANCE TEST
1.
Perform “POWER BALANCE” in “ACTIVE TEST” mode.
2.
Make sure that the each cylinder produces a momentary engine
speed drop.
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 10.
PBIB0133E