2.2 Control System JL4G18-D

2.2.1 Specifications
2.2.1.1 Fastener Tightening Specifications

Applications

Model

Specifications

Metric (Nm)

US English (lb-ft)

Camshaft Position Sensor Retaining Bolts

M6X14

8-10

6.0-7.4

Crankshaft Position Sensor Retaining Bolts

M6X12

8-10

6.0-7.4

Ignition Coil Retaining Bolts

M6X35

7-11

5.2-7.8

Engine Control Module Retaining Bolts

M6X16

8-10

6.0-7.4

Engine Coolant Temperature Sensor Bolts

M12 × 1.5 × 6

15

11

Evaporative Emissions Canister

M6X20

7-9

5.2-6.7

Evaporative Emissions Canister Solenoid Valve
Bracket Retaining Bolts

M6X20

7-9

5.2-6.7

Fuel  Filter  Mounting  Bracket  Assembly
Retaining Bolts

M6X16

8-10

6.0-7.4

Fuel Filter Mounting Bracket Retaining Bolts

M6X16

8-10

6.0-7.4

Fuel Rail Retaining Bolts

M6X20

10

7

Fuel Tank Retaining Bolts

M10X30

38-46

28.1-34.0

Idle Air Control Valve Retaining Bolts

M4X10

2-3

1.5-2.2

Knock Sensor Retaining Bolts

M8X30

15-22

10.7-16.0

Intake  Manifold  Absolute  Pressure  and
Temperature Sensor Retaining Bolts

M6X12

8-10

6.0-7.4

Oxygen Sensor Retaining Bolts

M18X8

44

32.6

Air-Conditioning Compressor Mounting Bolts

M8X80

25

18.2

Spark Plug Retaining Bolts

M14 × 1.25 × 22

20-30

14.8-22.2

Throttle Body Retaining Bolts

M8

20-25

14.8-18.5

2.2.1.2 Temperature Sensor Temperature and
Resistance Correlation

Temperature (°C) / (  ºF)

Resistance (Ω)

-30/-22

26,000

-25/-13

19,000

-20/-4

15,000

-15/5

11,800

-10/14

9,000

Engine

Control System JL4G18-D

2-11

Temperature (°C) / (  ºF)

Resistance (Ω)

-5/23

7,000

0/32

5,600

5/41

4,600

10/50

3,600

15/59

3,000

20/68

2,400

25/77

2,000

30/86

1,700

35/95

1,400

40/104

1,180

45/113

950

50/122

800

55/131

700

60/140

600

65/149

510

70/158

425

80/176

320

90/194

240

100/212

180

110/230

140

120/248

110

130/266

90

2.2.1.3  Altitude  and  Atmospheric  Pressure
Correlation

Altitude (m)/(ft)

Atmospheric Pressure (kPa)/(psi)

4,200/13,780

55/8

3,900/12,795

58/8.4

3,600/11,811

61/8.8

3,300/10,827

64/9.3

3,000/9,843

66/9.6

2,700/8,858

69/10

2,400/7,874

71/10.3

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Control System JL4G18-D

Engine

Altitude (m)/(ft)

Atmospheric Pressure (kPa)/(psi)

2,100/6,890

74/10.7

1,800/5,906

77/11.2

1,500/4,921

80/11.6

1,200/3,937

83/12

900/2,953

87/12.6

600/1,969

90/13.1

300/984

93/13.5

0

100/14.5

2.2.1.4 Intake Air Pressure Sensor Voltage and
Pressure Diagram

Absolute Pressure

Voltage

k

FE02-2001b

Engine

Control System JL4G18-D

2-13

2.2.2 Description and Operation
2.2.2.1 Overview

The engine use an electronic control system manufactured by
UAES(United  Automotive  Electronic  Systems  Co.,  Ltd.).  It
consists  of  the  engine  control  module  (ECM),  ECM  working
circuit, system input and output parts. ECM is located at the
right  side  of  the  Air-Conditioning  blower  and  is  the  engine
control  system  control  center.  It  continues  to  monitor  the
signals from various sensors and controls the various systems
performance.  Engine  control  module  also  performs  system
diagnostics,  it  can  identify  the  operational  malfunction  and
through the malfunction indicator light (MIL) to remind the driver
and  store  DTC  codes  in  order  to  facilitate  maintenance
personnel for maintenance.

If  the  engine  control  module  is  damaged,  there  is  no  single
spare part within the module can be repaired. ECM must be
replaced as a whole.

Input components: crankshaft position sensor (CKP), camshaft
position  sensor  (CMP),  intake  air  pressure  and  temperature
sensors  [intake  air  pressure  sensor  (MAP),  with  intake  air
temperature sensor (IAT)] , knock sensor (KS), throttle position
sensor (TPS), evaporation tank surface temperature sensor,
engine  coolant  temperature  sensor  (ECT),  vehicle  speed
sensor  (VSS),  pre-catalytic  heated  oxygen  sensor  (HO

2

S),

post-catalytic heated oxygen sensor (HO

2

S), air conditioning

pressure switch, power steering switch, defrost heating enable
input, CAN information input, serial data bus input.

Output  components:  idle  speed  control  valve  (IAC)  ,1-2-3-4-
cylinder  fuel  injectors,  ignition  coils,  variable  valve  timing
solenoid valve (VVT), canister solenoid valve (EVAP), the main
relay, pump relay and oil pump, cooling fan low speed relay,
cooling  fan  high  speed  relay,  air-conditioning  compressor
relay, CAN information output, serial data bus out.

2.2.2.2 Input Components

1. Crankshaft Position Sensor (CKP)

FE02-5121b

The  crankshaft  position  sensor  output  can  be  used  to
determine crankshaft position and rotation speed. Crankshaft
position sensor is a magnetic-electric sensor, which is installed
in the front end of the transmission housing, and tightened with
bolts, below the coolant temperature sensor. Flywheel signal
plate  and  the  crankshaft  sensor  is  an  integrated  part.  The
sensor extends out through the bearing. The gap between the
sensor and the signal plate teeth is below 1.2mm. The signal
plate  has  58  machined  slots,  of  which  57  slots  have  a  6  °
interval.  The  last  tooth  slot  is  wider,  used  to  generate
synchronization  pulses.  When  the  crankshaft  rotates,  the
sensor  plate  slot  will  change  the  sensor  magnetic  field,
resulting in an induced voltage pulse. The 58th slot pulse is
longer and can be used to identify a specific direction of the
crankshaft, so that the engine control module (ECM) may at
any  time  determine  the  direction  of  the  crankshaft.  Engine
control module uses this information to generate the ignition
timing and fuel injection pulse, and then controls the ignition
coil  and  fuel  injectors.  Sensor  signals  pass  through  ECM
harness  connector  EN01  terminal  No.46,47  to  ECM,  if  the
engine  control  module  detects  the  sensor  signals  erratic  or
incorrect, it will record DTC code P0321, P0322. and DTC code
P0016 will be recorded when the camshaft relative position is
not correct.

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Control System JL4G18-D

Engine