Chery Tiggo. Manual — part 186

ECM Connector Pin-Out Table

ECM PIN-OUT TABLE

PIN

CIRCUIT IDENTIFICATION

PIN

CIRCUIT IDENTIFICATION

1

Injector 1

39

-

2

Injector 3

40

-

3

-

41

A/C Pressure Switch

4

Idle Air Control 1

42

-

5

Idle Air Control 3

43

-

6

EGR Control

44

-

7

Lan 1

45

-

8

Fuel Pump Relay

46

-

9

EVAP Control

47

-

10

Ignition Coil 1

48

Diagnostic Link K

11

-

49

-

12

Switched Supply Voltage

50

RPM

13

GND

51

Lan 2

14

Injector 2

52

Upstream Oxygen Sensor Heater

15

Injector 4

53

-

16

-

54

Diagnostic Link K

17

Idle Air Control 2

55

Ignition Switch Start

18

Idle Air Control 4

56

Intake Air Temperature Sensor

19

Air Flow Sensor

57

-

20

-

58

-

21

Cooling Fan Control

59

Downstream Oxygen Sensor

22

A/C Relay

60

Upstream Oxygen Sensor

23

Ignition Coil 2

61

-

24

-

62

Knock Sensor

25

Switched Supply Voltage

63

-

26

GND

64

Continuous Supply Voltage

27

-

65

Regulated Sensor Supply

28

-

66

Ignition Switch On

29

Generator G

67

Engine Coolant Temperature Sensor

30

-

68

Throttle Position Sensor

31

-

69

Atmosphere Pressure Sensor

32

MIL Lamp

70

Speed In

33

Power Steering Switch

71

Idle Position Switch

34

Main Relay

72

Camshaft Position Sensor

35

-

73

Crankshaft Sensor

36

-

74

Air Flow Sensor

37

Generator FR

75

P/N Switch

38

-

76

Sensor (GND)

GENERAL INFORMATION

03

DIAGNOSIS & TESTING

Diagnostic Help

1. Confirm that the malfunction is current and carry-out the diagnostic tests and repair procedures.

2. If the Diagnostic Trouble Code (DTC) cannot be deleted, it is a current fault.

3. Use a digital multimeter to perform voltage readings on the Electronic Fuel Injection (EFI) system.

4. The scan tool connects to the Data Link Connector (DLC) and communicates with the ECM.

5. If the failure is intermittent perform the following:

• Check for loose connectors.

• Look for any chafed, pierced, pinched, or partially broken wires.

• Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.

• Look for the data to change or for the DTC to reset during the wiggle test.

• Look for broken, bent, pushed out or corroded terminals.

• Inspect the sensor and mounting area for any condition that would result in an incorrect signal, such as

damage or foreign material.

6. Remove the ECM from the troubled vehicle and install in a new vehicle and test. If the DTC can not be deleted,

the ECM is malfunctioning. If the DTC can be deleted, return the ECM to the original vehicle.

Diagnostic Logic

If the DTC can not be deleted, it is a current failure.

If the DTC can be deleted, it is an intermittent incident. In many cases, the malfunction resolves itself (the part or
circuit function returns to normal without intervention). It is important to realize that the symptoms described in the
customer’s complaint often do not recur on (1st trip) DTC visits. Realize also that the most frequent causes of inter-
mittent incidents occurrences is poor electrical connections. Because of this, the conditions under which the incident
occurred may not be clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not
indicate the specific malfunctioning area.

Check if it is because of the loosening of cable joint.

Look for any chafed, pierced, pinched, or partially broken wires.

Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.

Look for the data to change or for the DTC to reset during the wiggle test.

Look for broken, bent, pushed out or corroded terminals.

Inspect the sensor and mounting area for any condition that would result in an incorrect signal, such as damage,
foreign material.

Refer to any Technical Service Bulletins that may apply.
DIAGNOSTIC REFERENCE
• Check ground terminals for corroding or loose connection. Refer to ⬙Ground Inspection⬙.
• Search for electrical incident. Refer to ⬙Diagnosis for an Electrical Incident⬙.
• Check connector terminals. Refer to ⬙How to Check Terminal⬙.
DURING ENGINE CHECKS AND REPAIRS USE CAUTION NOT TO HARM THE ENGINE MECHANICAL SYSTEM
• Check cylinder pressure.
• Check ignition timing.
• Check fuel system pressure.
• Check the EVAP system.
• Check for vacuum leaks.
• Check output of the TPS.
• Check the injectors for leaks.
Remove and install the doubtful ECM to a new vehicle and test it. If the DTC can not be deleted, the malfunction is
inside of ECM; if the DTC can be deleted, change the original ECM back and check it again according to above
items.

Inspect and clean all ECM, engine, and body grounds that are related to the DTC. If numerous trouble codes were
set, use a wire schematic and look for any common ground or supply circuits for any camshaft pulley DTCs inspect
for dirt/metal debris.

Use the scan tool to perform a System Test if one applies to a failing component. A co-pilot, data recorder, and/or
oscilloscope should be used to help diagnose intermittent conditions.

CAUTION:
Before starting repairs which do not require battery power:
• Turn ignition switch off.

• Disconnect the negative battery terminal.

Ground Inspection

Ground connections are very important to the proper operation of electrical and electronic circuits. Ground connec-
tions are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can become an unwanted
resistance. This added resistance can alter the way a circuit works.

Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drastically
affect an electronically controlled circuit. A poor or corroded ground can effect the circuit. Perform the following when
inspecting a ground connection:

1. Remove the ground bolt or screw.

2. Inspect all mating surface for tarnish, dirt, rust, etc.

3. Clean as required to assure good contact.

4. Reinstall bolt or screw securely.

5. Inspect for

⬙add-on⬙ accessories which may be interfering with the ground circuit.

6. If several wires are crimped into one ground eyelet terminal, check for proper crimps. Make sure all of the wires

are clean, securely fastened and providing a good ground path. If multiple wires are crimped to one eyelet, make
sure no excess wire insulation has been crimped creating a bad ground.

Diagnostic Tools

1. Scan Tool X-431

2. Engine Analyzer (KES-200)

3. Digital Multimeter

4. Jumper Wire

Hardware Requirements

The hardware configuration of X-431 is as follows:

DIAGNOSIS & TESTING

03

Diagnostic Scan Tool Configuration

ITEM

NAME

DESCRIPTION

1

X-431 Main Unit

To Display Operational
Buttons, Test Results, Help
Information, etc.

2

Mini-Printer

To Print Test Results.
(Optional)

3

CF Card

To Store Diagnostic Software
and Data

4

USB Cable

To Connect CF Card
Reader/Writer and Computer

5

CF Card
Reader/Writer

To Read or Write Data On
The CF Card

6

Mitsubishi-12+16
Pin Connector

To Diagnose Mitsubishi
Electronic Control Systems
On Chery B11 Series

7

Fiat-3 Pin
Connector

To Diagnose Vehicles With
Fiat-3 Pin Diagnostic
Connector

ITEM

NAME

DESCRIPTION

8

Smart OBDII-16
Pin Connector

To Diagnose Other Systems
Of Vehicle With OBDII-16
Pin Diagnostic Connector

9

Power Cord

To Connect AC 100 - 240 V
Outlet and Power Adapter

10

Cigarette Lighter
Cable

To Get Power From Vehicle
Cigarette Lighter

11

Battery Cable
W/Two Clips

To Get Power From Vehicle
Battery

12

Power Adapter

To Convert 100 - 240 V AC
Power Into 12 V DC Power

13

Main Cable

To Connect The Diagnostic
Connector and Smartbox

14

Smartbox

To Perform Vehicle
Diagnosis

DIAGNOSIS & TESTING

BESM030003