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7.6. Serviceability check functioning / adjustment of system of ignition

In view of the fact that in system of ignition very high voltage is developed, service of its components has to be made with extra care. This remark belongs not only to the main knots of electronic system of ignition, but also and to all accompanying components, including tips of candle wires, a tachometer and the other diagnostic equipment.


Systems of contactless ignition with the distributor

Check of serviceability of giving of VV of tension on spark plugs

 PERFORMANCE ORDER

1. It is the best of all to make this check by means of a special tester. Now three types of testers of ignition were widely adopted. The inductive principle of functioning of a neon lamp is the basis for a design of the first of them; the device just nestles on a candle wire and the regular blinking of a lamp confirms serviceability of giving on the corresponding candle of VV of tension. Testers with the adjustable air gap which is adjusted according to performance data of a spark plug are issued. One more tester externally looks as the spark plug equipped sideways with the grounding plug, but without side electrode. Testers of two last types allow not only to check serviceability of giving for tension VV candle, but also (on color of flash) to estimate intensity of sparking, - the weak spark differs in yellow-orange color, strong - blue.

2. Professionals usually use an oscilloscope for this check, one of working wires of which is equipped with the inductive sensor connected to VV to a wire, the second - the plug allowing to ground the device on weight.

3. Disconnect a wire from a spark plug and connect it to a tester. Ground the device on the mass of the power unit.

When using a tester with the neon indicator need for a detachment of an electrical wiring is absent. In the absence of near at hand tester it is enough to delay a rubber cover of a tip of a candle wire up and to bring plugs to the mass of the engine on distance about 6 mm and to watch intensity of sparking.

4. Turning the engine, watch the spark which is formed between tester plugs
5. Existence of a spark of bright blue color confirms serviceability of giving on tension VV candle.
6. In the absence of sparking first of all it is necessary to check a condition of a candle wire, then to pass to diagnostics of separate components of system of ignition.


Identification of the cylinder responsible for admissions of ignition

 PERFORMANCE ORDER

1. Choose neutral transfer (RKPP) / transfer the selector lever to the provision of P (AT). Cock the parking brake.
2. Start the engine and leave it working at single turns.

3. Begin to disconnect serially wires from spark plugs, - the wire should be held for a tip, making it rotary motions. In order to avoid receiving electric shock you make an electrical wiring VV detachment by means of special nippers with the isolated handles. If the detachment of a wire leads to violation of stability of turns of the engine, therefore, this cylinder functions regularly, - connect a wire into place and disconnect following. Continue check until the defective cylinder is revealed, - at a wire detachment will not come from its spark plug of visible changes in operation of the engine.

4. Kill the engine and check a condition of VV of a wire and a spark plug of the suspected cylinder. In case of need make diagnostics of other components of system of ignition (see below).


Adjustment

 PERFORMANCE ORDER

Systems of contactless ignition in any adjustments, except installation of a corner of an advancing of ignition do not need. The description of the procedure of adjustment of a corner of an advancing of ignition see in the Head Nastroyki and routine maintenance.


Systems of direct ignition (DIS)

Checks

 PERFORMANCE ORDER

Checks it is made similarly described above for contactless systems of ignition.


Adjustment

 PERFORMANCE ORDER

The DIS systems in any adjustments, except installation of a corner of an advancing of ignition do not need. The description of the procedure of adjustment of a corner of an advancing of ignition see in the Head Nastroyki and routine maintenance.