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Checks Once in Diagnostic Mode (and after identifying the last three alarm triggers in case a theft warning system is USER ACTION TCU Reaction COMPONENT TESTED Driver’s door opened from closed Hazards flash once Driver’s door open signal Passenger or rear door opened from closed Hazards flash once Door open signal for opened door Driver’s door locked from unlocked Hazards flash once Driver’s door status signal Passenger door locked from unlocked Hazards flash once Assist door status signal Rear doors locked from unlocked Hazards flash once Rear doors status signal Ultrasonics cancel switch is pressed Hazards flash once U/S cancel signal Trunk or back door is opened from closed Hazards flash once Trunk open signal Hood is opened from closed Hazards flash once Hood open signal Hazard switch is pressed from off Hazards flash once Hazard switch signal Turn signal switch is moved to left from off Hazards flash once Left turn signal Turn signal switch is moved to right from off Hazards flash once Right turn signal Key turned to lock position in door Hazards flash once * Key cylinder lock switch signal Lighting switch turned 1st position or 2nd Hazards flash once Tail lamp signal Key put in ignition cylinder from out Hazards flash once Key in detect signal Central unlock switch is pressed Hazards flash once Central unlock/Trunk release signal *) Hazards may flash a second time because of Driver’s door status signal change. The min. delay time between flash actions is 100 ms. In case the system does not operate as described above, check the concerned circuit for open or short. TIME CONTROL UNIT (TCU) Trouble Diagnosis (Cont’d) EL-183 |