Friday, 2 October 2015

Blink Code in Antilock Braking System(ABS)

Blink Code

    Blink code is a method of visual indication of the components fault to the service technician, by means of flashing Blink Code Lamp. The number and sequence of flashes indicate the status of the system or the nature of failure. This is useful to the service technician both during periodic checkup as well as during troubleshooting the system whenever a failure is observed through the Warning Lamp.

How to use Blink Code?

    The Blink code can be read by pressing the blink code switch. The blink code switch should be pressed till the first flash appears. This typically takes about 5 second. The exact number of flashes, which are separated by pauses, should be noted. Using the blink code table, the corresponding failure can be easily identified.

    If the stored fault is not erased, it remains in the memory till it is erased, even if the fault is physically repaired. If there are more than one error, the user can read the errors one after the other by repairing and deleting the errors displayed and once again pressing the blink code switch.

How to erase Blink Code?

    The fault which is stored in the system memory can be erased by once again invoking the blink code switch and keeping the switch pressed for the first three flashing.

Sunday, 29 March 2015


     Spark plug is a device used to produce electric spark to ignite the compressed air fuel mixture inside the cylinder. The spark plug is screwed in the top of the cylinder so that it electrode project in the combustion chamber.

A spark plug consist of mainly three parts:

1. Center electrode or insulated electrode.
2. Ground electrode or outer electrode.
3. Insulation separating the two electrodes.

     The upper end of the center electrode is connected to the spark plug terminal, where cable from the ignition coil is connected. It is surrounded by insulator. The lower half portion of the insulator is fastened with a metal shell. The lower portion of the shell has a short electrode attached to one side and bent in towards the centre electrode, so that there is a gap between the two electrodes. The two electrodes are thus separated by the insulator. The sealing gaskets are provided between the insulator and the shell to prevent the escape of gas under various temperature and pressure conditions. The lower part of the shell has screw threads and the upper part is made in hexagonal shape like a nut, so that the spark plug may be screwed in or unscrewed from the cylinder head.

Cleaning the Spark Plug

     Due to the combustion of fuel in the cylinder, carbon particles deposit on and around the electrode which not only reduce the plug gap but also prevent the spark to occur. If the spark is still occurring, it is too weak that it cannot ignite the fuel. Hence the spark plug is to be cleaned. Carbon particles can deposit due to any reason like, nature of fuel, mixture strength, lubricating oil, etc. The spark plug can be cleaned by a sand paper.

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