Immobiliser Introduction – FUNCTION DESCRIPTION

An immobilizer is a system in an automobile that disables the ignition unless a specific key is applied or used. It is designed to aid in preventing vehicle theft.

The immobilizer unity is made up of two parts: a key containing an encoded transponder and an engine control unit (ECU) with identical coding to the transponder.

Once a key is inserted into the ignition and turned on, the ECU receives and decodes the code and, if a perfect match, turns over the engine. If the codes do not match, then the immobilizer does what it was named to do and disables the engine by damming the fuel supply.

Cases that requires immobilizer programming

  1. Replacement ECU. In this case, replace the every transponder of the key at once. Replace ECU – every transponder of the key should be replaced at the same time
  1. Replacement of the transponder Replacing the transponder
  1. Additional key or lost some keys
  2. Delete all codes for current or former keys from ECU
  3. Using the new key, clear transponder code and reprogram
  4. Program any additional or purchased keys.
  1. Lost every key
  2. Clear all stored key codes from the ECU
  3. Replace the key and key set
  4. Immobilizer programming




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