ELECTRICAL 135 1. EXTERIOR LIGHTS The lighting system of a motor vehicle consists of lighting and signaling devices mounted or integrated to the front, sides, rear, and in some cases the top of the motor vehicle. The purpose of this system is to provide illumination for the driver to operate the vehicle safely after dark, to increase the conspicuity of the vehicle, and to display information about the vehicle's presence, position, size, direction of travel, and driver's intentions regarding direction and speed of travel 1.1 TURN SIGNALS & HAZARD LIGHTS 1.1.1 Description Turn signals — formally called "directional indicators" or "directional signals", and informally known as "directional‘ s", "blinkers", "indicators" or "flashers" — are signal lights mounted near the left and right front and rear corners of a vehicle, and sometimes on the sides, used to indicate to other drivers that the operator intends a lateral change of position (turn or lane change). 1.1.2 Conditional Requirements Activation – • Hazard switch is activated or • Crash is detected or • Force panic is activated. Deactivation – • Hazard switch is deactivated & • Crash condition is removed & • Force panic is deactivated. Tell-tale Indication - On IC as long as the hazard is activated. On Fault – No telltale indication if all bulbs are failed and respective DTC logged. 1.1.3 Operating Voltage Range DESCRIPTION REQUIREMENT VOLTAGE Turn signal Normal voltage range 9V-16V Hazard Lights Normal voltage range Threshold: If voltage drops below 6V, then it should stop working AND when voltage rises to/above 7V, then it should start working. 7V-16V
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