JAC S2. Engine. Service Manual

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

凸轮轴信号： camshaft signal

0-5V 方波
square wave

sensor signal ground

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

cylinder

increase the objected idle speed to 1200rpm

connection terminal

MT22.1

ignition coil

normal measurement
signal

system main power

12V

cylinder drive

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

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

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

cylinder drive

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

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

cylinder

increase the objected idle speed to 1200rpm

connection terminal

MT22.1

ignition coil

normal measurement
signal

system main power

12V

3rd cylinder drive

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

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

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

cylinder drive

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

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

12V

canister solenoid drive

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

12V

canister solenoid drive

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

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

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

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

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

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

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

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

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

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

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

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Engine mounting System

Engine Mounting system 291

1：accelerator pedal signal 1

0.5 ～ 4.5V

sensor signal ground

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

1：accelerator pedal signal 1

0.5 ～ 4.5V

sensor signal ground

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

2：accelerator pedal signal 2

0.5 ～ 4.5V

sensor signal ground

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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JAC S2. Engine. Service Manual - part 20