ELECTRICAL 143 ELECTRICAL Low Current Failure If an open circuit is detected the BCM shall flash the Directional Indicators at a fast rate of 180 ± 30 cycles with a duty cycle 50%. On detecting a normal current draw level the Directional Indicators will return to the normal flash rate. Failure must be diagnosed and fast flash rate commence at the first illuminated phase after activation. An open circuit side repeater bulb will NOT trigger the Fast rate. Exterior Directional Indicator failure detection will be inhibited when the battery voltage is below 8V or above 16V or when the Vehicle Power State is CRANK. During an under/over voltage condition the BCM shall hold the previous Directional Indicator rate until the operating voltage returns to normal. Fast rate flashing is also active during 3 flash mode. High Current Failure If a short to ground is detected the BCM shall stop flashing turn signals lamps on the side where the failure is detected. The BCM will retry the failed lamp the next time the directional turn signal associated with the failure is activated or any function using the Directional Indicators is requested. Hazard warning: Hazard Warning is active in all Vehicle Power States. In Vehicle Power States OFF, ACC, ON and START, audible feedback is provided by the Instrument Cluster. Hazard Warning can be activated by Manual Switch or by the Inertia Switch, causing the Hazard lights to flash at 90 ± 30 cycles/min at duty cycle 50%. When Hazard Warning is active, the Hazard Warning Illumination should flash at the same rate as the exterior Hazard Lights. The Hazard Warning switch is a non latch able switch. When the hazard switch changes state from low to high this shall be detected as a valid switch press. Inertia Switch functionality can be only activated when power mode is ignition. Hazard warning lamps are already active and the Inertia switch becomes active, there will be no change in operation of the Hazard warning lamps but Hazard warning LED will be made OFF. If the Hazard warning lamps are already active due to normal Hazard Switch operation and hazard switch is pressed again, Hazard warning Lamps and Hazard Warning LED will be made OFF. If Hazard warnings Lamps are active due to Inertia switch activation then Hazard warning lamps will be made OFF if Inertia switch is deactivated. In this case Hazard warning LED will remain OFF. Hazard switch is monitored for a stuck switch condition . Hazard Warning Switch Illumination: The Hazard warning switch is fitted with a single LED for both night time illumination of the switch, and visual feedback when the hazard lights have been activated. The Hazard warning switch illumination should flash in sequence with the directional indicators only when the hazard warning is active. i.e. a valid switch press has been detected to turn the hazard warning on. The illumination should not flash when the directional indicators are illuminated for locking or alarm functionality. Direction Indicators: The Left and Right Direction Indicators are active in Vehicle Power States IGNITION ON and START. Activation of the hazard function will cancel the current Direction Indicator mode immediately. When the hazard function is not active, the Direction Indicator inputs should be evaluated again to determine the current Direction Indicator mode. The left or right Direction Indicators are selected using the Direction Indicator combination switch. When selected, the appropriate Direction Indicators lamps will flash at 90 ± 30 cycles/min duty cycle 50%, beginning with the illuminated phase, until the switch is released. When the Direction Indicators combination switch is returned to the neutral position during an illuminated phase, the current phase is allowed to finish. If the Vehicle Power State changes from IGNITION ON or START to ACCESSORY or OFF during an illuminated phase, the illumination will be stopped immediately.
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