JAC J2 User Manual

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Maintenance Manual for J2 Sedan
Electronic Control System
of Engine
160
V
Precautions
for On-board
diagnose
(OBD)
system
of
engine
The electronic control module (ECM) has an OBD system. The malfunction indicator lamp (MIL) of
OBD system will be lit to indicate the driver that there is malfunction caused by aging of the exhaust
system.
■
Be
sure to
turn the
ignition switch
to OFF
position and disconnect
the c
able of battery
negative
poles before
any repairing
or inspection. The
open circuit or
short circuit of
related switch, sensor
and solenoid valve may make the MIL lit.
■
After the
operation, be
sure to
insert connectors
and
lock them
firmly.
Loose (unlocked)
connectors
may result in the open circuit, accordingly making the MIL lit. (Make sure that there is no water,
grease and filth on the joint and port is not bent).
■
After the
operation, be
sure to
route
and
fix the
harness correctly.
The
interference between
support
and harness etc. may result in short circuit, accordingly making the MIL lit.
■
After the
operation, be
sure to
connect the
rubber pipe
properly.
The failed
connection of
the rubber
pipe
may cause
lighting of MIL
because of
failure of
the
EV
AP system
and fuel
injecti
on system
etc.
■
Be
sure to
clear
any uneffective DTC
from ECM
before transferring vehicle to
user (the
repair is
done).
■
Be
sure to use
the
12V
battery
as
the
power supply
.
■
Never
disconnect cable of
battery
with
engine
running.
■
Be sure t
o turn ignit
ion to OFF p
osition and disconnec
t cabl
e of battery before connecting or
disconnecting any ECM harness connectors. Otherwise the ECM may be damaged, because even if
the ignition is turned to OFF position, the ECM still has 12V voltage.
■
Turn
the ignition
switch to
OFF position and
disconnect the
connecting wire
cable
of storage
battery cathode before dismounting the any components.
■
Don’t
disassemble
the
ECM.
■ If one of the battery cable is disconnected, memory of ECM will return to
the
initial value.
And the
ECM may start to control itself with initial value. When battery is disconnected, the engine will
operate a little differently, which doesn’t mean any trouble. Don’t replace any components because
of a little change.
Battery
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Fig 4.1.007

JAC J2 Specifications

General

Brand	JAC
Model	J2
Category	Automobile
Language	English