JAC S2. Engine. Service Instruction - page 20
Engine mounting System
Engine Mounting system 277
judging criteria
possible fault reason
referenced trouble shooting scheme
发动机运转 engine is
running
1. poor connecting
1. connect it again
2. reference voltage circuit is open
2. repair wiring harness
3. signal ground is open-circuit
3. repair wiring harness
4. camshaft signal is open-circuit
4. repair wiring harness
5. sensor damage
5. change the sensor
6. fault of ECM port
6. change the ECM
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Engine mounting System
Engine Mounting system 278
Fault Code:P0340
fault code
P0340
no signal of camshaft position sensor
setting emergency control scheme
light up fault lamp until it is off
thers is 50% that probability that fuel injection sequence has 360
degree malposition
connection terminal
MT22.1
camshaft position
sensor
normal measurement
signal
5V reference voltage
70
C
5V
凸轮轴信号: camshaft signal
77
A
0-5V 方波
square wave
sensor signal ground
74
B
0V
judging criteria
possible fault reason
referenced trouble shooting scheme
发动机运转
engine is
running
1. poor connecting
1. connect it again
2. reference voltage circuit is open
2. repair wiring harness
3. signal ground is open-circuit
3. repair wiring harness
4. camshaft signal is open-circuit
4. repair wiring harness
5. sensor damage
5. change the sensor
6. fault of ECM port
6. change the ECM
Fault Code:P0351
fault code
P0351
fault of 1# ignition coil
setting emergency control scheme
light up fault lamp until it is off
stop the injection to 1
st
cylinder
increase the objected idle speed to 1200rpm
connection terminal
MT22.1
ignition coil
normal measurement
signal
system main power
\
12V
1
st
cylinder drive
04
0-12V near to
inductive peak of
square wave〉
300V
judging criteria
possible fault reason
referenced trouble shooting scheme
fault lasted for 1.25
seconds
1. 1
st
cylinder drive circuit is short to power
positive pole
1. repair wiring harness
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Engine mounting System
Engine Mounting system 279
2. ignition coil damage
2. change the ignition coil
3. ECM fault
3. change the ECM
Fault Code:P0352
fault code
P0352
fault of 2# ignition coil
setting emergency control scheme
light up fault lamp until it is off
stop the injection to 1
st
cylinder
increase the objected idle speed to 1200rpm
connection terminal
MT22.1
ignition coil
normal measurement
signal
system main power
\
12V
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Engine mounting System
Engine Mounting system 280
fault code
P0352
fault of 2# ignition coil
2
nd
cylinder drive
81
0-12V near to
inductive peak of
square wave〉
300V
judging criteria
possible fault reason
referenced trouble shooting scheme
fault lasted for 1.25
seconds
1. 2
nd
cylinder drive circuit is short to power
positive pole
1. repair wiring harness
2. ignition coil damage
2. change the ignition coil
3. ECM fault
3. change the ECM
Fault Code:P0353
fault code
P0353
fault of 3# ignition coil
setting emergency control scheme
light up fault lamp until it is off
stop the injection to 1
st
cylinder
increase the objected idle speed to 1200rpm
connection terminal
MT22.1
ignition coil
normal measurement
signal
system main power
\
12V
3rd cylinder drive
01
0-12V near to
inductive peak of
square wave〉
300V
judging criteria
possible fault reason
referenced trouble shooting scheme
fault lasted for 1.25
seconds
1. 3
rd
cylinder drive circuit is short to power
positive pole
1. repair wiring harness
2. ignition coil damage
2. change the ignition coil
3. ECM fault
3. change the ECM
Fault Code :P0354
fault code
P0354
fault of 4# ignition coil
setting emergency control scheme
light up fault lamp until it is off
stop the injection to 1
st
cylinder
increase the objected idle speed to 1200rpm
connection terminal
MT22.1
ignition coil
normal measurement
signal
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Engine mounting System
Engine Mounting system 281
system main power
\
12V
4
th
cylinder drive
62
0-12V near to
inductive peak of
square wave〉300V
judging criteria
possible fault reason
referenced trouble shooting scheme
fault lasted for 1.25
seconds
1. 4
th
cylinder drive circuit is short to power
positive pole
1. repair wiring harness
2. ignition coil damage
2. change the ignition coil
3. ECM fault
3. change the ECM
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Engine mounting System
Engine Mounting system 282
Fault Code :P0458
fault code
P0458
canister solenoid circuit is short to low voltage
setting emergency control scheme
light up fault lamp until it is off
close the canister solenoid
connection terminal
MT22.1
canister solenoid
normal
measurement signal
system main power
\
B
12V
canister solenoid drive
64
A
0-12V 方波
judging criteria
possible fault reason
referenced trouble shooting scheme
fault lasted for more
than 2 seconds
1. solenoid drive circuit is short to power
positive pole
1. repair wiring harness
2. solenoid damage
2. change the solenoid
3. ECM fault
3. change the ECM
Fault Code :P0459
fault code
P0459
canister solenoid circuit is short to high voltage
setting emergency control scheme
light up fault lamp until it is off
close the canister solenoid
connection terminal
MT22.1
canister solenoid
normal
measurement signal
system main power
\
B
12V
canister solenoid drive
64
A
0-12V
judging criteria
possible fault reason
referenced trouble shooting scheme
fault lasted for
more than 5
seconds
1. poor connecting
1. connect it again
2. solenoid drive circuit is short to power
negative pole
2. repair wiring harness
3. solenoid drive circuit is open
3. repair wiring harness
4. the circuit connected to system main
power is open
4. repair wiring harness
5. solenoid damage
5. change the solenoid
6. ECM fault
6. change the ECM
Fault Code:P0480
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Engine mounting System
Engine Mounting system 283
fault code
P0480
fault of low speed fan
setting emergency control scheme
light up fault lamp until it is off
fan does not work (open circuit); and the fan always work when
the water temperature reached 98 degree (short to ground)
connection terminal
MT22.1
low speed fan relay normal measurement
signal
battery
\
factory will provide
the instructions
12V
relay drive
65
factory will provide
the instructions
0V (Work),12V
(Stop)
judging criteria
possible fault reason
referenced trouble shooting scheme
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Engine mounting System
Engine Mounting system 284
fault code
P048
0
fault of low speed fan
fault lasted for
more than 3
seconds
1. poor connecting
1. connect it again
2. relay drive circuit is short to power
negative pole
2. repair wiring harness
3. relay drive circuit is open
3. repair wiring harness
4. the circuit connected to battery is open 4. repair wiring harness
5. relay damage
5. change the relay
6. ECM fault
6. chane the ECM
Fault Code:P0481
fault code
P0481
fault of high speed fan
setting emergency control scheme
light up fault lamp until it is off
fan does not work (open circuit); and the fan always work when
the water temperature reached 98 degree (short to ground)
connection terminal
MT22.1
low speed fan relay normal measurement
signal
battery
\
factory will provide
the instructions
12V
relay drive
17
factory will provide
the instructions
0V (Work),12V
(Stop)
judging criteria
possible fault reason
referenced trouble shooting scheme
fault lasted for
more than 3
seconds
1. poor connecting
1. connect it again
2. relay drive circuit is short to power
negative pole
2. repair wiring harness
3. relay drive circuit is open
3. repair wiring harness
4.the circuit connected to battery is open
4. repair wiring harness
5. relay damage
5. change the relay
6. ECM fault
6. chane the ECM
Fault Code:P0502
fault code
P0502
no signal of speed sensor
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Engine mounting System
Engine Mounting system 285
setting emergency control
scheme
light up fault lamp until it is off
may use some driving limitation measures
connection terminal
MT22.1
speed sensor
normal measurement
signal
sensor signal ground
80
/
0-12V square wave
judging criteria
possible fault reason
referenced trouble shooting scheme
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Engine mounting System
Engine Mounting system 286
fault code
P0562
system voltage is low
setting emergency control scheme
light up fault lamp until it is off
system stopped the fuel injection
connection terminal
MT22.1
ignition switch
normal
measurement signal
点火开关:ignition switch
68
refer to electric
system instruction
12V
judging criteria
possible fault reason
referenced trouble shooting scheme
turn on ignition
switch; fault
lasted for 5
seconds
1. generator regulator damage
1. change damaged voltage regulation
2. misuse the low-voltage battery
2. use correct battery
fault code
P0502
no signal of speed sensor
engine is running, and
spees is lower than
2kph; MAP<25.82Kpa
MAP is lower than
25.82Kpa; engine speed
is between 1200rpm and
5000rpm; close the
throttle valve
the fault lasted for more
than 5 seconds
1. poor connecting
1. connect it again
2. circuit from transmission to instrument
signal is open
2. change the flexible shaft or signal wire
3. wiring harness from instrument to ECM is
open
3. repair wiring harness
4. speed sensor damage
4. change the speed sensor
5. instrument fault
5. repair or change the instrument
6. ECM fault
6. chane the ECM
Fault Code:P0562
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Engine mounting System
Engine Mounting system 287
fault code
P0563
system voltage is high
setting emergency control scheme
light up fault lamp until it is off
system stopped the fuel injection
connection terminal
MT22.1
ignition switch
normal
measurement signal
点火开关:ignition switch
68
refer to electric
system instruction
12V
judging criteria
possible fault reason
referenced trouble shooting scheme
turn on ignition
switch
system voltage
is higher than
17.2V
fault lasted for
5 seconds
1. generator regulator damage
1. change damaged voltage regulation
2. misuse the high-voltage battery
2. use correct battery
fault code
P0571
fault of brake light switch
setting emergency control scheme
does not light (open circuit)
always light (short-circuit to ground)
connection terminal
MT22.1
system fault indicator
light
normal measurement
signal
ignition switch
\
refer to electric
system instruction
12V
indicator light drive
33
refer to electric
system instruction
OFF =12V, ON =0V
judging criteria
possible fault reason
referenced trouble shooting scheme
Fault Code:P0563
Fault Code:P0571
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Engine mounting System
Engine Mounting system 288
fault code
P0571
fault of brake light switch
fault lasted for
more than 2
seconds
1. poor assembly of fault light
1. assemble the light again
2. fault of ignition switch circuit
2. repair wiring harness
3. drive circuit is short to the power
negative pole
3. repair wiring harness
4. damage of the light
4. change the light
Fault Code:P0601
fault code
P0601
ROM verification fault
setting emergency control scheme
light up fault lamp until it is off
connection terminal
MT22.1
ECM
normal measurement
signal
ECM:
refer to electric
system instruction
\
judging criteria
possible fault reason
referenced trouble shooting scheme
fault
ECM fault
change the ECM
Fault Code:P0646
fault code
P0646
AC clutch circuit is short to low voltage
setting emergency control scheme
light up fault lamp until it is off
cut off the clutch relay circuit
connection terminal
MT22.1
normal measurement
signal
system main power
\
12V
AC clutch signal
09
0-12V square
wave
judging criteria
possible fault reason
referenced trouble shooting scheme
fault lasted for more
than 2 seconds
1. clutch drive circuit is short to power
positive pole
1. repair wiring harness
2. damage of AC clutch
2. change the AC clutch
3. ECM fault
3. change the ECM
Fault Code:P0647
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Engine mounting System
Engine Mounting system 289
fault code
P0647
AC clutch circuit is short to high voltage
setting emergency control scheme
light up fault lamp until it is off
cut off the clutch relay circuit
connection terminal
MT22.1
normal measurement
signal
system main power
\
12V
AC clutch signal
09
0-12V square
wave
judging criteria
possible fault reason
referenced trouble shooting scheme
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Engine mounting System
Engine Mounting system 290
fault code
P0647
AC clutch circuit is short to high voltage
fault lasted for
more than 5
seconds
1. poor connecting
1. connect it again
2. clutch drive circuit is short to power
negative pole
2. repair wiring harness
3. clutch drive circuit is open
3. repair wiring harness
4. circuit connected to system main power
is open
4. repair wiring harness
5. damage of AC clutch
5. change the AC clutch
6. ECM fault
6. change the ECM
Fault Code:P1397
fault code
P1397
no signal of wheel speed sensor
setting emergency control scheme
light up fault lamp until it is off
may use some driving limitation measures
connection terminal
MT22.1
speed sensor
normal measurement
signal
sensor signal ground
80
/
0-12V square wave
judging criteria
possible fault reason
referenced trouble shooting scheme
engine is running, and
spees is lower than
2kph; MAP<25.82Kpa
MAP is lower than
25.82Kpa; engine speed
is between 1200rpm and
5000rpm; close the
throttle valve the fault
lasted for more than 5
seconds
1. poor connecting
1. connect it again
2. circuit from transmission to instrument
signal is open
2. change the flexible shaft or signal wire
3. wiring harness from instrument to ECM is
open
3. repair wiring harness
4. speed sensor damage
4. change the speed sensor
5. instrument fault
5. repair or change the instrument
6. ECM fault
6. chane the ECM
Fault Code :P2122
fault code
P2122
low voltage or open circuit of electronic accelerator pedal
position sensor 1# circuit
setting emergency control scheme
light up fault lamp until it is off
connection terminal
MT22.1
1 accelerator pedal
position sensor 1
normal measurement
signal
5V reference voltage
70
2
5V
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Engine mounting System
Engine Mounting system 291
1:accelerator pedal signal 1
41
4
0.5 ~ 4.5V
sensor signal ground
74
3
0V
judging criteria
possible fault reason
referenced trouble shooting scheme
engine is running
fault lasted for
more than 2.5
seconds
1. accelerator pedal position sensor signal
circuit is short to 5V reference voltage or
power positive pole
1. repair wiring harness
2. sensor damage
2. change the sensor
3. fault of pressure signal inputting port on
ECM
3. chane the ECM
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Engine mounting System
Engine Mounting system 292
Fault Code :P2123
fault code
P2123
high voltage of electronic accelerator pedal position sensor 1#
circuit
setting emergency control scheme
light up fault lamp until it is off
connection terminal
MT22.1
1 accelerator pedal
position sensor 1
normal measurement
signal
5V reference voltage
70
2
5V
1:accelerator pedal signal 1
41
4
0.5 ~ 4.5V
sensor signal ground
74
3
0V
judging criteria
possible fault reason
referenced trouble shooting scheme
engine is running
fault lasted for
more than 2.5
seconds
1. poor connecting
1. connect it again
2. sensor signal circuit is open
2. repair wiring harness
3. sensor signal circuit is short to ground
3. repair wiring harness
4. sensor damage
4. change the sensor
5. fault of this signal inputting port
5. change the ECM
Fault Code :P2127
fault code
P2127
low voltage or open circuit of electronic accelerator pedal
position sensor 2# circuit
setting emergency control scheme
light up fault lamp until it is off
connection terminal
MT22.1
2 accelerator pedal
position sensor 2
normal measurement
signal
5V reference voltage
66
1
5V
2:accelerator pedal signal 2
42
6
0.5 ~ 4.5V
sensor signal ground
76
5
0V
judging criteria
possible fault reason
referenced trouble shooting scheme
engine is running
fault lasted for
more than 2.5
seconds
1. accelerator pedal position sensor signal
circuit is short to 5V reference voltage or
power positive pole
1. repair wiring harness
2. sensor damage
2. change the sensor
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