Document ID: chunk:federal_register_of_legislation:F2022C01070:body:0:p28
Version: federal_register_of_legislation:F2022C01070
Segment Type: other
Provision Reference: 
Character Range: 73818–76647

be so designed that any equipped vehicle continues to meet the technical requirements.
31.4. It shall not be possible for an immobiliser to enter the set state when the ignition key is in the engine running mode.
31.5. It shall not be possible to permanently override an immobiliser.
31.6. The immobiliser shall be designed and built such that when installed it shall not affect the designed function and operation of the vehicle, even in the case of malfunction.
31.7. An immobiliser shall be designed and built such that, when installed on a vehicle, according to the manufacturer's instructions, it cannot rapidly and without attracting attention be rendered ineffective or destroyed by, e.g. the use of low cost easily concealed tools, equipment or fabrications readily available to the public at large.  It shall be difficult and time consuming to replace a major component or assembly in order to bypass the immobiliser.
31.8. An immobiliser shall be so designed and built such that when installed as specified by the manufacturer it is able to withstand the environment within the vehicle for a reasonable lifetime (for testing see paragraph 33).  More particularly the electrical properties of the on-board circuitry shall not be adversely affected by the addition of the immobiliser (lead cross-sections, contact safety, etc.).
31.9. An immobiliser may be combined with other vehicle systems or may be integrated into them (e.g. engine management, alarm systems).
32. PARTICULAR SPECIFICATIONS
32.1. Extent of disablement
32.1.1. An immobiliser shall be designed so as to prevent the operation of the vehicle under its own power by at least one of the following means:
32.1.1.1. disable, in the case of after-market fitting, or vehicle equipped with diesel engine, at least two separate vehicle circuits that are needed for vehicle operation under its own power (e.g. starter motor, ignition, fuel supply, etc.);
32.1.1.2. interference by code of at least one control unit required for the operation of the vehicle;
32.1.2. An immobiliser for fitment to a vehicle equipped with a catalytic converter shall not cause unburnt fuel to enter the exhaust.
32.2. Operating reliability
 Operating reliability shall be achieved by suitable design of the immobiliser, account being taken of specific environmental conditions in the vehicle (see paragraphs 31.8. and 33).
32.3. Operating safety
 It shall be ensured that the immobiliser does not change its state (set/unset) as a result of any of the tests in paragraph 33.
32.4. Setting of the immobiliser
32.4.1. The immobiliser must be set without supplementary action from the driver by at least one of the following means:
- at rotation of the ignition key into the "0" position in the ignition lock and activation of a door; in addition, immobilisers which unset immediately