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JAC
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J2
JAC J2 User Manual
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Maintenance
Manual
for
J2
Sedan
Mechanical
Part
of
Engine
102
Section
III
Cooling
System
of
Engine
I.
Cooling
Circuit
1.
Co
ol
in
g
Ci
rc
ui
t
Di
ag
ra
m
Co
ol
in
g
cir
cu
it
di
agr
am
2.
Pr
in
ci
ple
Di
ag
ra
m
of
Coo
li
ng
Ba
si
c dia
gr
am of coo
lin
g
Radiator
Expansion
tank
Th
er
mo
st
at
Thermostat
casing
Wa
te
r
pu
mp
Cylinder
body
Cylinder
cover
Thermostat
off
Thermostat
on
W
a
r
m
a
i
r
h
e
a
t
e
x
c
h
a
n
g
e
r
A
i
r
t
h
r
o
t
t
l
e
b
o
d
y
F
i
x
i
n
g
b
o
l
t
s
o
f
c
o
o
l
a
n
t
p
u
m
p
p
u
l
l
e
y
C
o
o
l
a
n
t
p
u
m
p
p
u
l
l
e
r
B
o
l
t
s
f
o
r
w
a
t
e
r
p
u
m
p
W
a
t
e
r
p
u
m
p
a
s
s
e
m
b
l
y
S
e
a
l
r
i
n
g
o
f
w
a
t
e
r
p
u
m
p
H
e
a
t
e
r
w
a
t
e
r
r
e
t
u
r
n
i
n
g
p
i
p
e
b
o
l
t
s
I
Heater
water
returning
pipe
bolts
II
Heater
water
returning
pipe
Spacer
of
heater
water
returning
pipe
Thermost
subassembly
Wa
te
r
pu
mp
fee
de
r
Wa
te
r pum
p inl
et
bo
lt
T
h
r
o
t
t
l
e
p
r
e
-
h
e
a
t
i
n
g
o
u
t
l
e
t
h
o
s
e
T
h
r
o
t
t
l
e
p
r
e
-
h
e
a
t
i
n
g
o
u
t
l
e
t
h
o
s
e
102
104
Table of Contents
Table of Contents
2
Identification Information Position
3
Vehicle Information
4
Nameplate
4
Vehicle Identification Number (VIN)
4
Engine Number
6
Lifting, Protection and Towing of Vehicle
8
Lifting of Vehicle
8
Protection of Vehicle
8
Towing of Vehicle
8
General Service
10
Section I Service
10
Chapter II Service
10
Regular Service
11
Service of Engine
12
Recommended Oil and Lubricant
13
Service of Chassis and Body
21
Maintenance Data
29
Engine Volume
31
Chapter I Mechanical Part of Engine
34
General Precautions
34
Section I Engine Body
34
Precautions on Sealant
35
Preparation
37
Engine Assembly
40
Drive Belt
44
Air Filter and Air Duct
46
Intake Manifold and Exhaust Manifold
48
Exhaust System
52
Timing Sprocket Mechanism
54
Camshaft and Balance Shaft Assembly
59
Cylinder Head
65
Valves
69
Cylinder Body Assembly
73
Diagnosis of Common Troubles
87
Parameters for Maintenance
89
Precautions
93
Section II Engine Lubrication System
93
Preparation
94
Engine Oil
95
Oil Filter
97
Oil Pan and Engine Oil Pump
99
Cooling Circuit
103
Section III Cooling System of Engine
103
Engine Coolant
104
Radiator
106
Radiator Cooling Fan
108
Water Pump
108
Thermostat Sub-Assembly
110
Water Piping Sub-Assembly
112
Trouble Analysis
113
Parameters for Maintenance
114
General Precautions
115
Section IV Fuel Supply System of Engine
115
Fuel System
116
Preparation
116
Fuel Injector and Guide Rail
117
Fuel Filter
120
Fuel Pump Assembly
123
Fuel Tank Assembly
127
Fuel Evaporation Control System
129
Section V Emission Control System of Engine
129
Forced Ventilating System of Crankcase
133
Chapter II Electrical Part of Engine
136
Ignition Coil
136
Section I Ignition System
136
Diagnosis of Common Troubles
138
Parameters for Maintenance
138
Battery
139
Principle Diagram of Starting and Charging System
139
Section II Starting and Charging System
139
Starting System
142
Charging System
150
Chapter III Electronic Control System of Engine
156
General Precautions
156
Precautions in Maintenance
156
Precautions of Supplemental Restraint System (SRS)
156
Section I Precautions
156
Common Tools for Diagnose
158
Precautions for On-Board Diagnose (OBD) System of Engine
161
Section II Structural Principle and Inspection of Engine Control System
164
System Description
164
Multiple-Point Fuel Injection System
165
On-Board Diagnosis System
168
Engine Trouble Diagnosis
174
Intake Manifold Absolute Pressure (MAP/MAT) Sensor
180
Section III Structural Principle and Inspection of Engine Electronic Components
180
Engine Coolant Temperature (ECT) Sensor
182
Throttle Position Sensor
184
Crankshaft Position Sensor
186
Camshaft Phase Sensor
189
Oxygen Sensor
192
Fuel Injector (INJ)
195
Knock Sensor
196
Air-Conditioning Switch and Relay
198
Canister Solenoid Valve
199
Ignition Coil
200
Electric Fuel Pump
202
Electronic Control Module (ECM) of Engine
204
Diagnosis with DTC
207
Section IV Trouble Diagnosis Procedures for Engine Control System
207
Diagnosis by Trouble Phenomena
227
4
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JAC J2 Specifications
General
Brand
JAC
Model
J2
Category
Automobile
Language
English
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