Chery A15. Manual — part 247

Note: Do not use the starter to start the engine or it may cause damage.
(1) Check the air filter to see if the air intake system and air intake manifold is too dirty.
(2) Disconnect the storage battery cathode.
(3) Suck out the liquid on the spark plug with cloth
(4) Take out all spark plugs and operate the crank shaft with a motor.
(5) Distinguish the liquids in the cylinder (like cooling liquid, fuel, engine oil or others).
(6) Take out all liquids from the cylinder and check for any damage of the engine
(connecting rod, piston, valve, etc).
(7) When repairing the engine or its components, avoid it if necessary.
Note: pay attention to component lubrication during reinstalling.
(8) Fix new spark plugs
(9) Drain the engine oil and unfix the engine oil filter
(10) Fix the new engine oil filter.
(11) Fill in the engine oil of the original engine manufacturer.
(12) Connect the storage battery cathode.
(13) Start the engine and check for any leakage.



Nine. Troubleshooting on engine cylinder gasket
Appropriate surface treatment is necessary to ensure the sealing effect of the cylinder
gasket, especially for the cylinder gaskets that use aluminum engine components or
multiple metal layers.
Plastic or wooden cleaning device (Figure 4)

Figure 4 Use Appropriate Surface Treatment Tools

1. Grinder

2. Steel Eraser

3. Shovel

Chapter Three Engine Control System

Section One System Introduction

One. System features
The Tritec 1.6L engine control system adopted for Chery A15 series is based on Delphi MT20
engine control module (ECM) and abbreviated as MT20 engine control system.
Latest electronic hardware technology is adopted in the design of MT20 engine control module
to realize relatively high price/performance ratio. In terms of hardware, 16-digit microprocessor
(CPU) is adopted to provide sufficient memory and high calculating speed and flexibly define
I/O input and output diagnostic protocol. Second-generation control software in modulized C
language is adopted. MT20 features all technical specifications necessary to satisfy the Euro III
regulations. The system’s application features on A15 series include closed-loop computerized
control, sequential multi-injection, grouped direct ignition and three-way catalyst treatment. The
major functions include:
- Air measurement in the speed density method of intake air pressure
- Closed-loop control sequential multi-injection
- Fuel pump working control
- Built-in ignition drive module of ECM, independent grouped direct ignition
- Closed-loop control of knock
- Closed-loop control of stepping motor idle running
- Plug-in type air conditioning
- Cooling water tank fan control
- Charcoal canister solenoid valve control
- Self-diagnosis of the system
- Overvoltage protection
- Mileage memory

Two. Location of engine compartment component


















1. Ignition coil 2. Camshaft position sensor 3. Fuel pressure adjustor
4. Spray nozzle 5. Charcoal canister solenoid valve 6. Generator
7. Knock sensor 8. Intake air pressure – temperature sensor 9. Idle speed motor
10. Throttle position sensor

11. Crank shaft position sensor

12. High-voltage wire

13. Battery

14. Water temperature sensor

Three. Performance of the whole car and engine

Car model

SQR7162

Engine model

Tritec 1.6L

Cylinder quantity

4

Cylinder dia. (mm)

77

Stroke (mm)

85.8

Displacement (L)

1.6

Compression ratio

10.5

Ignition sequence

1 – 3 – 4 – 2

Engine performance

Net power:

Net torque:

Specific fuel consumption

> 83KW @ 5600rpm

> 146 Nm @ 4500～5000 rpm

< 341 g/KW*h (1600r/min, 2.4bar)

Continued

Low-temperature startup

≥－30°:

≥－20°:

≥ 0°:

at -35

° :

Success on first-time startup, startup time

≤ 8 s

Success on first-time startup, startup time

≤ 5 s

Success on first-time startup, startup time

≤ 3 s

Successful startup with accelerator pedal partially stepped
down

Stability at idle speed(rpm)

750±25

Gearbox:

Manual transmission, 5 gears

First-gear transmission ratio

3.5

Second-gear transmission ratio

1.95

Third-gear transmission ratio

1.36

Fourth-gear transmission ratio

0.972

Fifth-gear transmission ratio

0.811

Reverse-gear transmission ratio

3.42

Main transmission ratio

4.12

Drive mode

Front engine, front drive (FF)

Total mass (kg)

1050

Loaded mass (kg)

1425

Cooling fan

Electronic type, first gear starts at 98

°C and stops at 94°C

Second gear starts at 105

°C and stops at 101°C

Fan will continue to work for one minute if water

temperature is above 101

°C after shutoff

Fan will continue to work for half a minute if water

temperature is above 94

°C after shutoff

Fan will stop if water temperature is below 85

°C after

shutoff

Air-conditioning system

Effective air conditioner

Applicable fuel

93# unleaded gasoline or above (GB17930-1999)

Normal idle speed (rpm)

750 ±30/850 ±50 (A/C)

Exhaust emissions under running mode

Satisfy the emission requirements in GB18352.2－2001

(Euro III standard)

Exhaust emissions at double idle speed

- At normal idle speed: HC

≤ 80 ppm CO ≤ 0.3 %

- 2000 rpm idle speed: HC

≤ 60 ppm CO ≤ 0.2 %

Evaporative emission

Satisfy GB18352.2－2001: < 2.0 g/test

Electromagnetic interference

Satisfy GB14023－2000

Driving performance at plateau

Within the altitude of -100 – 4,000m, the driving

performance is all right