Chery A15. Manual - part 116

 

(4) Wait until the cooling fan stops.   

3. With the help of WDS or corresponding instrument, check whether the ignition timing falls 

within the scope of the specification.   

Ignition timing: 

Approx.: 10

±5 degrees advancing TDC 

4. When the engine speed is gradually increasing, confirm that the ignition timing is also 

correspondingly advanced forward. 

Check idling engine speed 

Note: 

·The ignition timing must not be adjusted. 

·Checking the ignition timing requires the use of WDS or corresponding instrument. 

1. Switch off all the electrical devices in the vehicle. 

2. The procedures of preheating the engine are as follows: 

（

1）Start the engine.   

（

2）Keep the rotation speed of the engine at about 3,000 R.P.M. until the cooling fan starts to 

rotate. 

（

3）Release the fuel accelerating pedal. 

3. With the help of WDS or corresponding instrument, check whether the ignition timing falls 
within the scope of the specification. 

Engine idle speed (480ED-1000010EA combined with electronics) 

Conditions 

Engine revolutions（RPM） 

Non- load 

800-900 

Electrical devices in the vehicle start to work. 

800-900 

A/C is switched on, and cooling switch is switched off. 

800-900 

A/C is switched on, and cooling switch is switched on. 

950-1050 

 

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INSTRUMENTATION SYSTEM 

INTRODUCTION OF INSTRUMENTS 

SYSTEM DESCRIPTION 

The Chery sedan A15LHD employs indicator needles and digital combination instruments, 
the combination instruments including various instruments and measuring equipments that 
are used to indicate the conditions of the car, various warning lamps that are used to monitor 
the abnormal conditions and notify the driver quickly, indicator lamps that are used to notify 
the driver for the condition of all parts, with the function of illuminating the instruments and 
meters.  

It includes speedometer with mileage, water temperature meter, fuel meter, engine tachometer, 
fuel warning lamp, warning lamp for unclosed door, engine warning lamp, warning lamp for 
engine oil, brake system warning lamp, ABS warning lamp, seat belt warning lamp, air bag 
warning lamp, generator warning lamp, turning signal indicator lamp, danger warning 
flashing indicator lamp, headlight high beam indicator lamp, fog lamp, multi-function display, 
control unit, power supply assembly unit, printed circuit board, etc. (Illustration -1) 

 

External appearance of instruments (Illustration – 1) 

 

 

 

 

 

 

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System components and functions are as follows: 

Name of Component 

Function 

Speedometer 

The indicator needle of speedometer is moving as 
per the signal from speed sensor, indicating the 
driving speed of the car. 

Tachometer 

The indicator needle of tachometer is moving as per 
the signal from ignition, indicating the engine 
rotation speed. 

Water 

temperature 

meter 

The indicator needle of water temperature meter is 
moving as per the signal from sensor, indicating the 
engine coolant temperature. 

Fuel meter 

The indicator needle of fuel meter is moving as per 
the signal from sensor, indicating the remaining 
fuel quantity in the fuel tank. 

Odometer 

The odometer, counting the car’s gross traveling 
distance as per the pulse signal from speed sensor, 
may switch over within short distance. 

Dual short-range 

Odometer 

The dual short-range odometer, counting the car’s 
traveling distance as per the pulse signal from the 
speed sensor, and may be reset by the switch. 

Power module 

The regulator circuit installed in the power module 
is supplying current to various components of the 
instruments through fuse S21 10A. 

Combination 

instrument 

Circuit board 

This board is containing the circuitry systems of 
various meters and measuring instruments, warning 
lamps and indicator lamps, as well as warning 
activating circuits for the engine oil level, odometer 
and short-range odometer and the circuit system of 
various indicator lamps. 

Speed sensor 

Installed in gearbox, this sensor transmits the pulse 
signal according to the output shaft rotation speed 
to the combination instrument. 

Water temperature sensor 

This sensor, which converts the engine coolant 
temperature into resistance, transmits the relevant 
signal to the combination instrument. 

Fuel sensor 

This sensor, which converts the residual fuel oil 
level in the fuel tank into resistance, transmits the 
relevant signal to the combination instrument. 

Warning switch for fuel level 

When the fuel level drop down to the preset level, 
the level sensor signal activates the circuit in the 
fuel meter and switches on the warning lamp. 

 

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Warning switch for low oil pressure 

The switch is installed on the engine body. When 
the oil pressure drops, the switch will be activated 
and switched on the warning lamp. 

Warning switch for engine oil level 

The switch is installed in the engine oil tank. When 
the level of engine oil drops, the warning lamp will 
be switched on. 

Warning switch for brake oil level 

The switch is installed in the main pump oil storage 
tank of the brake. When the brake oil level drops, 
the warning lamp will be switched on. 

Brake switch 

The switch is installed on the driving brake pedal 
bracket. When the pedal is pressed, the switch will 
be activated to switch on the warning lamp. 

Courtesy lamp switch 

When the car door is opened, the switch will be 
activated to switch on the warning lamp. 

Warning lamp 

When an abnormal condition is detected, the 
warning signal will be transmitted or grounded 
automatically, thus switching on the relevant 
warning lamp. 

Indicator lamp 

The warning signal will be transmitted or grounded 
automatically, thus switching on the relevant 
indicator lamp or keep the driver informed of the 
relevant status. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

PRINCIPLE OF INSTRUMENTATION SYSTEM 

Schematic diagram of instrumentation circuit   

The combination instrument is connected with the wiring harness of the instrument via a 
28-socket connector.

 

 

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