Document ID: chunk:federal_register_of_legislation:F2017C01153:front:0:p28
Version: federal_register_of_legislation:F2017C01153
Segment Type: other
Provision Reference: 
Character Range: 84073–87212

function.

1.2                                      Parking Brake System for LB, LD and LE Vehicles Only

         The vehicle must be equipped with a parking brake system such that in the applied position retention is effected by a mechanical means, and the braking effect of which is effected by the frictional force developed between friction surfaces.

1.3                                      Service Brake Failure Indicator Lamps

1.3.1                                Vehicles equipped with a 'Split Service Brake System' must have one or more brake failure indicator lamps mounted in front of and in clear view of the driver.

1.3.2                                The indicator lamp must be activated whenever any of the following conditions occur whilst the ignition switch is in the "engine on" position:

1.3.2.1                          in the case of a service brake system not incorporating a 'Brake Power Unit 31/00', when a pressure failure occurs in any part of the service brake system except for pressure failure caused by:

1.3.2.1.1                    a structural failure of a brake master cylinder body in a split integral body type master cylinder system;

1.3.2.1.2                    a structural failure of a service brake system failure indicator body; or

1.3.2.1.3                    failure of a vacuum component of a vacuum 'Brake Power Assist Unit'.

1.3.2.1.4                    In the event of such failure, for the purpose of this clause the lamp activation requirement will be met if the lamp is activated before or upon application of line pressure of not more than 1.38 MPa measured at a master cylinder outlet or at a slave cylinder outlet if the master cylinder controls a slave cylinder at a booster unit, or before or upon application of a 'Braking Effort' of not more than 90 N;

1.3.2.2                          in the case of a service brake system with a single 'Brake Power Unit 31/00', when the supply pressure in the unit drops to less than half the operating pressure;

1.3.2.3                          in the case of a service brake system with 2 or more independent 'Brake Power Units 31/00' when the supply pressure in any one unit is depleted;

1.3.2.4                          a drop in the level of brake fluid in a master cylinder reservoir, without application of 'Braking Effort', to less than the 'Manufacturer's' recommended safe level or to less than one half of the fluid reservoir capacity in any reservoir compartment, whichever is the greater; or

1.3.2.5                          a total electrical failure in an 'Antilock System' or 'Variable Proportioning Brake System'.

1.3.3                                The indicator lamp must be so designed that it is activated when the ignition switch is turned:

1.3.3.1                          from the "off" to the "on" position; or

1.3.3.2                          from the "off" to the "start" position.

1.3.4                                Unless a failure of the type described in clause 1.3.2 exists in the service brake system, the indicator lamp must be deactivated:

1.3.4.1                          in the case of