40 Troubleshooting SEN00460-01
114E-3 Series
31
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
4 Defective supply pump
a For testing of return rate from supply pump, see Testing and
adjusting, “Testing leakage from pressure limiter and return rate
from injector.”
Return rate from supply
pump
Cranking (When
engine cannot be
started)
Max. 200 cc/
30 sec.
At low idle (When
engine can be
started)
Max. 300 cc/
30 sec.
5 Defective pressure limiter
a For testing of leakage from pressure limiter, see Testing and
adjusting, “Testing leakage from pressure limiter and return rate
from injector.”
Leakage from pressure
limiter
At low idle
Below 30 drops/
60 sec.
6
Defects in supply pump
plunger
a Remove supply pump head, and inspect plunger for damage
directly.
7 Air in low-pressure circuit
Inspect it for air entry directly according to the following procedure.
1) Remove pressure pickup plug (outlet side) from fuel main filter.
2) Operate feed pump of fuel pre-fuel filter.
3) Inspect fuel and air from pressure pickup plug for leakage level.
• If this error occurs during bleeding air after replacement of the fuel
filter, air left in the fuel circuit is suspected. Continue engine oper-
ation at low idle approximately 3 minutes. When air is bled from
the fuel circuit, engine speed becomes stable and the error indi-
cation disappears.
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