JAC J2 User Manual

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Maintenance Manual for J2 Sedan
Electronic Control System
of Engine
161
■
When c
onnecting
the EC
M harne
ss connectors,
push th
e deflec
tor rod
(1) downwa
rd mostl
y to
lock
securely.
■
When
Inserting
the
contact
pin
into
the
ECM
or pulling it out, be aware to avoid damaging
contact pin port (bent or broken). When
connecting the contact pin, make sure that the
contact pin port of ECM is not bent or
broken.
■
Connect
the
harness
connectors
of
ECM
firmly. Poor connection may cause extremely
high (fluctuation) voltage on the coil and
capacitor, accordingly resulting in damage of
IC.
■
The harness
of the
electronic control
system of
engine should be
remained for
a
length of
at
least
10cm from the joint in order to avoid any trouble of the electronic control system of engine caused
by receiving the exterior noise signal and decreasing the operation of IC etc.
■
Keep
the
parts
and
harness of
the
electronic control system dry.
■
Inspect ECM
with port
and
reference value
to
assure the
normal
function of
ECM
before replacing.
■
Even the
very little
leakage
in
the
intake
system may
lead
to
the
severe trouble.
■
Don’t swing
or
vibrate the
camshaft position
sensor (phase)
or the crankshaft position sensor
(position).
■
Perform DTC
validatio
n proced
ures or
the whol
e func
tion inspe
ction
after con
duction
of troubl
e
diagnosis. If repair is finished, DTC should not be seen in the validation procedures. Overall
function inspection should obtain a good result after repair completed.
■ When measuring
the
ECM
with the
circuit tester
,
never make
two me
asuring devices
contacted. If
the probes touch occasionally, the short circuit may be cause and the power transistor of ECM may
be damaged.
■
During me
asurement
of input
/output
voltages,
the g
rounding port
must not be
used. Ot
herwise
the
transistor of ECM may be damaged. Ports other than the ECM may be
used for gounding.
■
Fuel
pump
must
not
be
used
without
fuel
in
pipes.
Fig 4.1.008
Broken
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Bent
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JAC J2 Specifications

General

Brand	JAC
Model	J2
Category	Automobile
Language	English