Driver Controls and Instruments smaller one-line by three-character LCD that shows voltmeter readings. pressure goes below a minimum level specified by the engine manufacturer (see the engine manual). Warning and Indicator Lights The red high coolant temperature (thermometer symbol) warning light and buzzer activate when- ever the coolant temperature goes above a maxi- mum level specified by the engine manufacturer (see the engine manual). There can be up to 26 warning and indicator lights in- stalled in the level I ICU. See Fig. 3.20 . There are four rows of lights in the dash message cen- ter. Lights installed in the top row are optional, and their positions may vary.
The lights in the bottom three rows are installed in fixed positions on all vehicles. Most are standard, but a few are optional. The red fasten seat belt warning light illuminates whenever the ignition switch is turned on, and stays on for 15 seconds. The green right- and left-turn signal lights flash on and off whenever the outside turn signals are flashing. The red parking brake on (!P symbol) warning light illuminates whenever the parking brake is engaged. The buzzer sounds if the vehicle is moving at a speed greater than 2 mph (3 km/h) with the parking brake set. The blue high-beam indicator light illuminates when the headlights are on high beam.
The amber CHECK ENGINE indicator light illumi- nates if an engine condition exists such as low coolant level, high coolant temperature, or low oil pressure. It also illuminates when a fault is de- tected or recorded. The amber RECIRC AIR indicator light illuminates whenever the ventilating system is switched to recirculated air. The red low air pressure (circle with arrows sym- bol) warning light and buzzer activate whenever air pressure in the primary or secondary air reser- voir falls below 64 to 76 psi (440 to 525 kPa). The red ENGINE PROTECT warning light illumi- nates to indicate that the protection system avail- able on the engine has been activated.
The Trailer ABS lamp will illuminate at vehicle start-up and when there is a fault in the trailer ABS system. The lamp will only operate when a The red low oil pressure (oil can symbol) warning light and buzzer activate whenever the engine oil 3.20