Ford Sierra



Ford Sierra
1.2. Car identification
2. Maintenance service
- 3. The general data
   - 3.1. Cars with petrol engines
      3.1.1. Weights and transfer numbers
      3.1.2. Operational liquids
       3.1.3. Changes in a design of the car with 1984 to 1986
      - 3.1.4. Changes in a design of the car with 1987 to 1989
         3.1.4.1. Engine OHC
          3.1.4.2. Engine CVH 1,8 дм3
          3.1.4.3. Engine DOHC
         - 3.1.4.4. Service and repair
            3.1.4.4.1. Ignition system
            3.1.4.4.2. Injection system
            3.1.4.4.3. The scheme of system EES of IV engine DOHC 2,0 дм3
            3.1.4.4.4. Check and adjustment of system EES IV
            3.1.4.4.5. Elimination of malfunctions
            3.1.4.4.6. Check of elements of system EES IV
            3.1.4.4.7. System timing
            3.1.4.4.8. A head of the block of cylinders of the engine
            3.1.4.4.9. Engine dismantling
            3.1.4.4.10. Engine assemblage
            3.1.4.4.11. Greasing system
          3.1.4.5. Coupling
         3.1.4.6. A mechanical five-speed transmission of type
          3.1.4.7. A mechanical five-speed transmission of type МТ 75
         3.1.4.8. An automatic transmission
         3.1.4.9. A forward suspension bracket
          3.1.4.10. Brake system
          3.1.4.11. The electric equipment
         3.1.4.12. The general data
       3.1.5. Changes in a design of the car with 1990 till February, 1993
    3.2. Cars with diesel engines
4. Engines
5. Coupling
6. Transmissions
7. A kardannyj shaft and the back bridge
8. A steering
9. Suspension brackets
10. Brake system
11. A body
12. An electric equipment



3.1.4.4. Service and repair

3.1.4.4.1. Ignition system
THE GENERAL DATA

Design and functioning of system of ignition

Both types of engine DONS are equipped with electronic system of ignition:

  – Engines with carburettor fuel system: system of ignition ESC II;
  – Engines with injection: system of ignition ЕЕС IV.

System of ignition ESC II

The electric scheme of electronic system of ignition ESC of II carburettor engine DOHC 2,0 дм3

And – the electromagnetic valve of overlapping of giving of fuel after deenergizing of the engine,
B – the generator,
C – резисторный a heating element of the automatic starting arrangement of the carburettor,
D – the switch of ignition,
E – the module of management of ignition ESC II,
F – the gauge of temperature of a cooling liquid,
G – the gauge of position and number of turns of a cranked shaft,
H – the coil of ignition,
J – the accumulator,
K – a coding socket октанового fuel numbers

This system contains:

  – The distributor of ignition with the distributor of a high voltage and the contactless gauge of the Hall which are carrying out a role of the gauge of number of turns of a cranked shaft of the engine;
  – The ignition coil;
  – The vacuum gauge in an inlet collector;
  – The gauge of temperature of a cooling liquid;
  – The gauge of neutral position of the lever of a gear change of an automatic transmission (only in cars with an automatic transmission).

The electronic module of management of ignition ESC II receives signals from these gauges and on their basis and the data containing in its memory, selects optimum, for the given working conditions of the engine, the moment of interruption of a current in a primary winding of the coil of ignition, and thereby an optimum angle of an advancing of ignition. Then includes a current in a primary winding and interrupts a current in it during the moment when in the next cylinder there should be an ignition, again submits a current to this winding etc.

The corner of an advancing of ignition is constantly regulated according to received signals and the data containing in memory of the electronic module.

In engines with the carburettor the module of management of ignition ESC II corrects also position throttle заслонки in a no-load time depending on number of turns, loadings on the engine (for example, transfer inclusion in an automatic transmission or inclusion of the compressor of the conditioner), a thermal condition of the engine, and also from position throttle заслонки.

Check of elements of system of ignition ESC II


Checked element
Measurement between contacts
Ignition
Value
Remarks
Connection картера with weight
"16" and weight
"3" and weight
It is switched off
0 – 0,5 Ohm
 
The proof-reader октанового fuel numbers
"7" and "16"
"19" and "16"
It is switched off
Resistance infinitely big
Before check to disconnect module ESC II
The gauge of temperature of a cooling liquid
"10" and "22"
It is switched off
37 clod at 20 With
4 clod at 80 With
 
The electromagnetic valve демпфера the lever throttle заслонки
"24" and "4"
It is switched off


It is included
Resistance infinitely big

65 – 80 Ohm
If is
The gauge of position of a cranked shaft
"5" and "18"
"17" and "16"
It is included
300 – 500 Ohm
Resistance infinitely big
 
Power supplies of module ESC II
"4" and "16"
It is included
10 – 14 IN
 

The prevention

The method of check of elements of system of ignition of engine DOHC united with system of injection of fuel entering into control system of engine EES IV, is resulted in section of injection of fuel.


System of ignition ЕЕС IV

This system of ignition functions on the same principle, as the system of ignition ESC II, only is united with fuel injection in the general control system of engine EES IV, and the electronic actuation device operates also injection system.
The prevention

Described systems of ignition do not demand adjustment.


Removal and installation of the distributor of ignition

Removal and installation of the distributor of ignition do not represent great difficulties. Elements of system of ignition of engine DOHC are represented in drawing.

Elements of system of ignition of engine DOHC

1 – a cover, the distributor,

2 – a rotor of the distributor,

3 – a plate,

4 – a lead,

5 – high voltage wires свеч ignitions,

6 – a spark plug,

7 – a wire of a high voltage of the coil of ignition,

8 – the coil of ignition,

9 – the electronic module of management of ignition


The ignition distributor can be established only in one, correct position.

Check of elements of system of ignition

In carburettor engine DOHC it is necessary to disconnect a multicontact socket of the module of management of ignition ESC II and to measure by means of a multimeter resistance and pressure on the chosen contacts of a socket according to the resulted table.

In case of wrong values of electric parametres before to consider the given element damaged, it is necessary to check up a condition of a corresponding electric contour.