JAC S2. Engine. Service Manual

Engine mounting System

Engine Mounting system 261

fault code

P0108

high voltage of air inlet pressure sensor circuit

setting emergency control scheme

light up fault lamp until it is off; engine is stop: 100kPa; engine is
in idle: ≈ 32kPa

engine is running: manifold pressure changes with the opening of
throttle valve

connection terminal

MT22.1

pressure sensor

normal measurement
signal

5V reference voltage

manifold pressure signal

0.5 ～ 4.5V

sensor signal ground

judging criteria

possible fault reason

referenced trouble shooting scheme

engine is running

without TPS fault

MAP>98.117kPa

TPS<19.141% the

fault lasted for

more than 2.5

seconds

1. pressure signal circuit got short circuit to

5V reference voltage or power positive pole

1 repair wiring harness

2. sensor damage

2. change the sensor

3. pressure signal inputing port fault on
ECM

3. change the ECM

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Engine mounting System

Engine Mounting system 262

Fault Code :P0112

fault code

P0112

low voltage of air inlet temperature sensor circuit

setting emergency control scheme

light up fault lamp until it is off; inlet air temperature is equal to
coolant temperature but lower than 44.25 degree

connection terminal

MT22.1

temperature sensor normal

measurement signal

inlet air temperature signal

0.5 ～ 4.5V

sensor signal ground

judging criteria

possible fault reason

referenced trouble shooting scheme

running time of

engine is longer than

120 seconds; MAT is

lower than -38.25

degree; fault lasted for

more than 2.5 seconds

1. poor connecting

1. connect it again

2. open circuit of temperature signal
ground circuit

2. repair wiring harness

3. open circuit of sensor signal ground
circuit

3. repair wiring harness

4. temperature signal circuit got short
circuit to power positive pole

4. repair wiring harness

5. sensor damage

5. change the sensor

6. signal inputing port fault on ECM

6. change the ECM

Fault Code :P0113

fault code

P0113

high voltage of air inlet temperature sensor circuit

setting emergency control scheme

light up fault lamp until it is off; inlet air temperature is equal to
coolant temperature but lower than 44.25 degree

connection terminal

MT22.1

temperature sensor normal

measurement signal

inlet air temperature signal

0.5 ～ 4.5V

sensor signal ground

judging criteria

possible fault reason

referenced trouble shooting scheme

running time of

engine is longer than

60 seconds; MAT is

1. temperature signal circuit got short
circuit to ground

1. repair wiring harness

2. sensor damage

2. change the sensor

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Engine mounting System

Engine Mounting system 263

higher than 148.5

degree; fault lasted

for more than 2

seconds

3. signal inputing port fault on ECM

3. change the ECM

Fault Code :P0117

fault code

P0117

low voltage of coolant temperature sensor circuit

setting emergency control scheme

light up fault lamp until it is off; use inlet air temperature when
starting, and fix the temperature when it increased to 79.5 degree

connection terminal

MT22.1

coolant temperature
sensor

normal
measurement signal

coolant temperature signal

0.5 ～ 4.5V

sensor signal ground

judging criteria

possible fault reason

referenced trouble shooting scheme

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Engine mounting System

Engine Mounting system 264

fault code

P0117

low voltage of coolant temperature sensor circuit

running time of
engine is longer than
10 seconds; MAT is
lower than -38.25
degree; fault lasted for
more than 2 seconds

1. poor connecting

1. connect it again

2. open circuit of temperature signal
ground circuit

2. repair wiring harness

3. open circuit of sensor signal ground
circuit

3. repair wiring harness

4. temperature signal circuit got short
circuit to power positive pole

4. repair wiring harness

5. sensor damage

5. change the sensor

6. signal inputing port fault on ECM

6. change the ECM

Fault Code :P0118

fault code

P0118

high voltage or open circuit of coolant temperature sensor circuit

setting emergency control scheme

light up fault lamp until it is off; use inlet air temperature when

starting, and fix the temperature when it increased to 79.5

degree

connection terminal

MT22.1

coolant temperature
sensor

normal
measurement signal

coolant temperature signal

0.5 ～ 4.5V

sensor signal ground

judging criteria

possible fault reason

referenced trouble shooting scheme

running time of
engine is longer
than 2 seconds; CTS
is higher than 135
degree; fault lasted
for more than 2
seconds

1. temperature signal circuit got short
circuit to ground

1. repair wiring harness

2. sensor damage

2. change the sensor

3. signal inputing port fault on ECM

3. change the ECM

Fault Code :P0122

fault code

P0122

low voltage of ETC throttle valve position sensor 1# circuit

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Engine mounting System

Engine Mounting system 265

setting emergency
control scheme

light up fault lamp until it is off;
set the opening of throttle valve position sensor to be 0% in idle speed; opening in
other rotating speeds will change with the corresponding speeds
suspend auto-zero of throttle valve position sensor
suspend clearing function

connection terminal

MT22.1

throttle valve
position sensor

normal measurement
signal

5V reference voltage

throttle valve position
1 signal

0.5 ～ 4.5V

sensor signal ground

judging criteria

possible fault reason

referenced trouble shooting scheme

engine is running, but

the speed is slower

than 3000rpm; no

MAP fault and MAP is

lower than 70kpa; the

fault lasted for more

than 2 seconds

1. sensor signal circuit got short circuit to

power positive pole or reference voltage

1. repair wiring harness

2. sensor damage

2. change the sensor

3. signal inputing port fault on ECM

3. change the ECM

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Engine mounting System

Engine Mounting system 266

Fault Code:P0123

fault code

P0123

high voltage or open circuit of ETC throttle valve position sensor
1# circuit

setting emergency control scheme

light up fault lamp until it is off;
set the opening of throttle valve position sensor to be 0% in idle
speed; opening in other rotating speeds will change with the
corresponding speeds
suspend auto-zero of throttle valve position sensor
suspend clearing function

connection terminal

MT22.1

throttle valve
position sensor

normal measurement
signal

5V reference voltage

throttle valve position 1 signal

0.5 ～ 4.5V

sensor signal ground

judging criteria

possible fault reason

referenced trouble shooting scheme

the fault lasted for
more than 2 seconds

1. poor connecting

1. connect it again

2. open circuit of sensor signal ground
circuit

2. repair wiring harness

3. sensor signal circuit got short circuit to
ground

3. repair wiring harness

4. sensor damage

4. change the sensor

5. signal inputing port fault on ECM

5. change the ECM

Fault Code :P0131

fault code

P0131

front oxygen sensor is short-circuit to low voltage

setting emergency control scheme

light up fault lamp until it is off and turn off the ignition switch
closed-loop working time of system postponed

connection terminal

MT22.1

heating oxygen
sensor

normal
measurement signal

main power of system

12V

heat driving

oxygen sensor high signal

0 ～ 1000mV
fluctuation

oxygen sensor low signal

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Engine mounting System

Engine Mounting system 267

judging criteria

possible fault reason

referenced trouble shooting scheme

the fault lasted for
more than 1 seconds

1. heat driving circuit got short circuit to
power positive pole

1. repair wiring harness

2. sensor damage

2. change the sensor

3. signal outputing port fault on ECM

3. change the ECM

Fault Code :P0132

fault code

P0132

front oxygen sensor is short-circuit tohigh voltage

setting emergency control scheme

light up fault lamp until it is off and turn off the ignition switch

closed-loop working time of system postponed

connection terminal

MT22.1

heating oxygen
sensor

normal
measurement signal

main power of system

12V

heat driving

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Engine mounting System

Engine Mounting system 268

fault code

P0132

front oxygen sensor is short-circuit tohigh voltage

oxygen sensor high signal

0 ～ 1000mV
fluctuation

oxygen sensor low signal

judging criteria

possible fault reason

referenced trouble shooting scheme

fault of

without main

relay lasted for

more than 1

seconds

1. poor connecting

1. connect it again

2. open circuit of heat driving circuit

2. repair wiring harness

3. heat driving circuit got short circuit to
ground

3. repair wiring harness

4. sensor damage

4. change the sensor

5. signal outputing port fault on ECM

5. change the ECM

Fault Code :P0133

fault code

P0133

too-slow response of front oxygen sensor

setting emergency control scheme

light up fault lamp until it is off and turn off the ignition switch

closed-loop working time of system postponed

connection terminal

MT22.1

heating oxygen
sensor

normal
measurement signal

main power of system

12V

heat driving

oxygen sensor high signal

0 ～ 1000mV
fluctuation

oxygen sensor low signal

judging criteria

possible fault reason

referenced trouble shooting scheme

fault of without

main relay

lasted for more

than 1 seconds

1. poor connecting

1. connect it again

2. open circuit of heat driving circuit

2. repair wiring harness

3. heat driving circuit got short circuit to
ground

3. repair wiring harness

4. sensor damage

4. change the sensor

5. signal outputing port fault on ECM

5. change the ECM

Fault Code :P0137

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Engine mounting System

Engine Mounting system 269

fault code

P0137

rear oxygen sensor is short-circuit to low voltage

setting emergency control scheme

light up fault lamp until it is off and turn off the ignition switch

closed-loop working time of system postponed

connection terminal

MT22.1

heating oxygen
sensor

normal
measurement signal

main power of system

12V

heat driving

oxygen sensor high signal

0 ～ 1000mV
fluctuation

oxygen sensor low signal

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Engine mounting System

Engine Mounting system 270

fault code

P0137

rear oxygen sensor is short-circuit to low
voltage

judging criteria

possible fault reason

referenced trouble shooting scheme

fault lasted for more
than 1 seconds

1. heat driving circuit got short circuit to
power positive pole
2. sensor damage
3. signal outputing port fault on ECM

1. repair wiring harness

2. change the sensor
3. change the ECM

Fault Code :P0138

fault code

P0138

rear oxygen sensor is short-circuit to high voltage

setting emergency control scheme

light up fault lamp until it is off and turn off the ignition switch

closed-loop working time of system postponed

connection terminal

MT22.1

heating oxygen
sensor

normal
measurement signal

main power of system

12V

heat driving

oxygen sensor high signal

0 ～ 1000mV
fluctuation

oxygen sensor low signal

judging criteria

possible fault reason

referenced trouble shooting scheme

fault of without main

relay lasted for more

than 1 seconds

1. poor connecting

1. connect it again

2. open circuit of heat driving circuit

2. repair wiring harness

3. heat driving circuit got short circuit to
ground

3. repair wiring harness

4. sensor damage

4. change the sensor

5. signal outputing port fault on ECM

5. change the ECM

Fault Code :P0222

fault code

P0222

low voltage of ETC throttle valve position sensor 2# circuit

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Engine mounting System

Engine Mounting system 271

setting emergency control scheme

light up fault lamp until it is off;
set the opening of throttle valve position sensor to be 0% in idle
speed; opening in other rotating speeds will change with the
corresponding speeds
suspend auto-zero of throttle valve position sensor
清淹功能暂停 suspend clearing function

connection terminal

MT22.1

throttle valve
position sensor

normal measurement
signal

5V reference voltage

throttle valve position 2 signal

0.5 ～ 4.5V

sensor signal ground

judging criteria

possible fault reason

referenced trouble shooting scheme

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Engine mounting System

Engine Mounting system 272

fault code

P0222

low voltage of ETC throttle valve position sensor 2# circuit

engine is running, but

the speed is slower

than 3000rpm; no

MAP fault and MAP is

lower than 70kpa; the

fault lasted for more

than 2 seconds

1. sensor signal circuit got short circuit to

power positive pole or reference voltage

1. repair wiring harness

2. sensor damage

2. change the sensor

3. signal inputing port fault on ECM

3. change the ECM

Fault Code :P0223

fault code

P0223

high voltage or open circuit of ETC throttle valve position sensor
2# circuit

setting emergency control scheme

light up fault lamp until it is off;
set the opening of throttle valve position sensor to be 0% in idle
speed; opening in other rotating speeds will change with the
corresponding speeds
suspend auto-zero of throttle valve position sensor
清淹功能暂停 suspend clearing function

connection terminal

MT22.1

throttle valve
position sensor

normal measurement
signal

5V reference voltage

throttle valve position 2 signal

0.5 ～ 4.5V

sensor signal ground

judging criteria

possible fault reason

referenced trouble shooting scheme

the fault lasted for
more than 2
seconds

1. poor connecting

1. connect it again

2. open circuit of sensor signal ground
circuit

2. repair wiring harness

3. sensor signal circuit got short circuit to
ground

3. repair wiring harness

4. sensor damage

4. change the sensor

5. signal inputing port fault on ECM

5. change the ECM

Fault Code :P0230

fault code

P0230

fault of fuel pump relay

setting emergency control scheme

light up fault lamp until it is off

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Engine mounting System

Engine Mounting system 273

connection terminal

MT22.1

fuel pump relay

normal measurement
signal

main power of system

refer to instruction of
electric system

12V

sensor signal ground

refer to instruction of
electric system

0V (Work)，12V (Stop)

judging criteria

possible fault reason

referenced trouble shooting scheme

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Engine mounting System

Engine Mounting system 274

fault code

P0230

fault of fuel pump relay

the fault lasted for
more than 1.5625
seconds

1. poor connecting

1. connect it again

2. the circuit connected to main system
power is open

2. repair wiring harness

3. relay drive circuit got short to system
power negative pole

3. repair wiring harness

4. relay drive circuit is open

4. repair wiring harness

5. relay damage

5.change the relay

6. signal outputing port fault on ECM

6. change the ECM

Fault Code :P0325

fault code

P0325

fault of knock sensor

setting emergency control scheme

light up fault lamp until it is off
use safety ignition angle of advance

connection terminal

MT22.1

knock sensor

normal measurement
signal

knock high signal

0-1V

knock low signal

judging criteria

possible fault reason

referenced trouble shooting scheme

engine speed is
slower than
2000rpm; MAP is
lower than 50kpa;
the fault lasted for
more than 5 seconds

1. poor connecting

1. connect it again

2. knock signal circuit is open

2. repair wiring harness

3. sensor signal ground is short-circuit

3. repair wiring harness

4. sensor signal circuit is short to other
circuits

4. repair wiring harness

5. sensor damage

5. change the sensor

6. signal outputing port fault on ECM

6. change the ECM

Fault Code :P0336

fault code

P0336

signal interference of crankshaft position sensor circuit

setting emergency control scheme

light up fault lamp until it is off

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Engine mounting System

Engine Mounting system 275

connection terminal

MT22.1

crankshaft position
sensor

normal measurement
signal

sensor signal

sine wave (with
sensor B)

pressure signal

sine wave (with
sensor A)

system ground wire

judging criteria

possible fault reason

referenced trouble shooting scheme

engine is running;
after 5 consecutive

loop, the number of

tooth to get into

ECM is not equal to

1. poor shielding of signal circuit

1. use shield wire

2. 58x tooth ring has metal foreign matter 2. clean 58x tooth ring

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Engine mounting System

Engine Mounting system 276

Fault Code :P0337

fault code

P0337

no signal of crankshaft position sensor circuit

setting emergency control scheme

light up fault lamp until it is off
engine cannot start

connection terminal

MT22.1

crankshaft position
sensor

normal measurement
signal

sensor signal

sine wave (with
sensor B)

pressure signal

sine wave (with
sensor A)

system ground wire

judging criteria

possible fault reason

referenced trouble shooting scheme

start the engine; no

engine speed; MAP

decreased; 2.9509kpa;

system voltage

decreased 0.8V;

vehicle speed is

slower than 4lm/h;

fault lasted for more

than 2 seconds

1. poor connecting

1. connect it again

2. reverse connection of high and low signal 2. repair wiring harness

3. signal circuit is open

3. repair wiring harness

4. signal circuit is short to other circuits

4. repair wiring harness

5. sensor damage

5. change the sensor

6. signal inputing port fault on ECM

6. change the ECM

Fault Code :P0341

fault code

P0341

fault of camshaft position sensor rationality

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

camshaft signal

0-5V 方波 square
wave

sensor signal ground

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JAC S2. Engine. Service Manual - part 19