Citroen Xantia

since 1993 of release

Repair and car operation

Diagnostics of malfunctions of system of ignition

At emergence of violations always first of all it is necessary to make sure of functioning of systems of ignition/injection of fuel that a cause of failure is not violation of quality of electric contacts or neglect performance of procedures of routine maintenance. Check a condition of a filtering element of an air purifier, spark plugs (including measurement of an interelectrode gap), hoses of system of ventilation of a case, etc. (for more details see. Head Routine maintenance). Also check adjustment of a cable of gas (see. Head of the Power supply system and release). At violation of stability of turns of the engine make measurement of kompressionny pressure in cylinders and check installation of klapanny gaps (see. The repair procedures which are not demanding extraction of the engine from the car - petrol engines).

If during the executed checks to reveal a cause of failure it is not possible, the car should be driven away on car repair shop. In an electric contour of a control system the engine switched on the diagnostic socket to which the special input reader allowing in the shortest terms to establish the reasons of taking place violations is connected, without resorting thus to connected with risk of a conclusion out of operation ECU to testing separately all knots and components of the relevant systems.

The unique checks of system of the ignition which performance lies within qualification of the average amateur mechanic, are described in Head Routine maintenance and concerning survey of spark plugs, and also check of the coil of the ignition, described in the present Chapter. Check of a condition of electroconducting of a chain of system with use of the schemes provided in Head Onboard electric equipment can be in case of need made - surely before disunite the electric socket (ы) ECU.