FUEL SYSTEM <DOHC>
13-295
Filter
Connector
Solenoid coil
Plunger
Needle valve
fuel injection relay
I
The area enclosed with
is
Harness side
applicable onlv for Turbo.
connector
Engine
module
Engine control module connector
OPERATION
l
The
injectors
are
equipped injection nozzles that function to inject
fuel based upon injection signals from the
engine control module.
l
Because the surface area of the injection ports is
fixed and because the pressure of the fuel
relative to the pressure within the manifold is
also regulated to a fixed pressure, the amount of
fuel injection by injectors is determined by the
TROUBLESHOOTING HINTS
Hint 1:
If there is a problem with starting while the engine is
warm, perform the combustion test and check for
leakage of the injectors.
Hint 2:
If the engine can’t be started, and the injectors are
not activated during cranking, the cause is probably
a malfunction such as described below, not with the
injectors.
(1) Malfunction of the circuit for supply of power to
the engine control module, or of the ground cir-
cuit.
(2) Malfunction of the
fuel injection relay.
(3) Malfunction of the crankshaft position sensor
and/or the camshaft position sensor.
Hint 3:
If there
is
a cylinder for which the idling condition
does not change when, during idling, the
injection of the injectors is cut off in sequence,
length of time that the needle valve is open, or,
in other words, by the length of time of current
flow to the solenoid coil.
l
Battery power supply is supplied, by way of the
fuel injection relay, to the injectors.
When the engine control module switches ON
the power transistor within the unit and current
flows to the solenoid coil, the injectors open and
fuel is injected.
check that cylinder as described below.
Check the injector and harness.
(2) Check the spark plugs and the high-tension
cable.
(3) Check the compression pressure.
Hint 4:
if the injector activation time deviates from the
standard value even though the results of the
checking of the injector’s harness and of the injector
itself are normal, the cause may be pressumed to
be one of the following,
(1) Incomplete combustion within the cylinder.
(Malfunction of the spark plugs, the ignition coil,
the compression pressure, etc.)
(2) Incomplete close contact of the EGR valve seat.
(3) Increased engine resistance.
TSB Revision
Содержание 1989 Galant
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