Warning and Indicator Lights

108SD d 04.02.000

There can be up to 28 telltales installed in the ICU. If an optional lamp is not requested, the position is blank.

See Table for a list of standard and commonly used warning and indicator lamps.

Warning and indicator lamps illuminate in red (danger), amber (caution), green (status advisory), or blue (high-beam headlights active).

Important: Depending upon local jurisdictional emissions guidelines, vehicles and/or engines that are domiciled outside of the U.S. and Canada may not be compliant with EPA10 or GHG21 regulations. Noncompliant vehicles may not be equipped with all of the warning and indicator lamps shown.

Table 1, Common Warning and Indicator Lamps

Lamp Description			Color
	STOP Engine^*	Indicates a serious fault that requires engine shutdown immediately. The engine protection system will reduce the maximum engine torque and speed, and, if the condition does not improve, will shut down the engine within 30 to 60 seconds. Safely bring the vehicle to a stop on the side of the road and shut down the engine as soon as the red light is seen. If the engine shuts down while the vehicle is in a hazardous location, turn the key to the OFF position for a few seconds, then restart the engine and move the vehicle to a safer location.	RED
	High Coolant Temperature	Indicates the coolant temperature is above the maximum allowable temperature.	RED
	Low Air Pressure	Indicates air pressure in the primary or secondary reservoir has dropped below approximately 70 psi (483 kPa).	RED
	Low Engine Oil Pressure	Indicates the engine oil pressure is below the minimum allowable pressure.	RED
	Transmission Overheat	Indicates high transmission temperature.	RED
	Parking Brake	Indicates the parking brake is engaged.	RED
	Low Battery Voltage	Indicates that battery voltage is 11.9 volts or less.	RED
	Unfastened Seat Belt	Activates with an audible alert when the system detects that the parking brake is off and the driver seat belt is not fastened on some vehicles. On other vehicles, this lamp illuminates for 15 seconds when the ignition is first turned on.	RED
	CHECK Engine^*	Indicates an engine condition (low oil pressure, low coolant level, high coolant temperature, high DPF soot level, or uncontrolled DPF regeneration) that requires correction. Correct the condition as soon as possible. If the condition worsens, the STOP engine lamp will illuminate.	AMBER
	High Exhaust System Temperature (HEST)^*	Slow (10-second) flashing indicates a regeneration (regen) is in progress. IMPORTANT: When the HEST lamp is illuminated, do not park the vehicle near flammable material. Solid illumination indicates high exhaust temperatures at the outlet of the tail pipe when speed is below 5 mph (8 km/h).	AMBER
	Diesel Particulate Filter (DPF) Status	Solid illumination indicates a regen is required. Change to a more challenging duty cycle (such as highway driving ) to raise exhaust temperatures for at least twenty minutes, or perform a parked regen. Blinking indicates that a parked regen is required immediately. An engine derate and shutdown will occur.	AMBER
	Malfunction Indicator Lamp (MIL)	Indicates an emissions-related fault. See the engine operation manual for details.	AMBER
	Vehicle ABS	Momentary illumination indicates the vehicle ABS is engaged. Solid illumination indicates a problem with the vehicle ABS. Repair the ABS immediately to ensure full braking capability.	AMBER
	Trailer ABS	Momentary illumination indicates the trailer ABS is engaged. Solid illumination indicates a problem with the trailer ABS. Repair the ABS immediately to ensure full braking capability.	AMBER
	No Charge	Indicates the alternator is not properly powering the electrical system.	AMBER
	Water in Fuel	Indicates the fuel may contain water. Drain any water collected in the fuel/water separators.	AMBER
	Fuel Filter Restriction	Indicates the fuel filter is clogged and requires service.	AMBER
	Optimized Idle	Indicates optimized idle is enabled.	AMBER
	Check Transmission	Indicates an undesirable transmission condition.	AMBER
	Wait To Start (EPA10)	Indicates that the system is preventing the starter from cranking. This can occur when the ignition switch is turned to START before the gauge sweep has completed, or if the starter has overheated. Turn the ignition switch back to ON, wait for the lamp to go out, then turn the ignition switch to START again.	AMBER
	Start Blocked (GHG14 only)	Indicates that the system is preventing the starter from cranking. This can occur when the ignition switch is turned to START before the gauge sweep has completed, or if the starter has overheated. NOTE: Illumination of the Start Blocked lamp does not indicate a problem with the starter. Turn the ignition switch back to ON, wait for the lamp to go out, then turn the ignition switch to START again.	AMBER
	Wheel Spin (pre-EPA16)	Flashing indicates the ATC system is active, or the ATC button has been pressed to allow wheel slip. Solid illumination indicates ATC is shut off or unavailable due to a system fault. In the event of a system fault, repair the ATC system immediately to ensure full braking capability.	AMBER
	Stability Event (EPA16 and newer)	Flashing indicates a stability event has been detected, and the ESC system is active. Solid illumination indicates a problem with the stability system. Repair the ESC system immediately to ensure full stability capability.	AMBER
	ATC Deactivated (EPA16 and newer)	Flashing indicates the ATC SPIN button has been pressed to allow wheel slip. Solid illumination indicates ATC is shut off or unavailable due to a system fault. In the event of a system fault, repair the ATC system immediately to ensure full braking capability.	AMBER
	Roll Stability (pre-EPA16)	Momentary illumination indicates that a stability event has occurred. On vehicles that are also equipped with ATC, flashing indicates the ATC button has been pressed to allow wheel slip. Solid illumination indicates ATC is shut off or unavailable due to a system fault. In the event of a system fault, repair the ATC system immediately to ensure full braking capability.	AMBER
	Hill Start Aid (HSA) Override	Indicates the HSA switch has been pressed to override the hill start assist feature.	AMBER
	Engine Brake	Indicates the engine brake is enabled.	GREEN
	Left-Turn Signal	Flashing indicates the outside left-turn signal lights are activated.	GREEN
	Right-Turn Signal	Flashing indicates the outside right-turn signal lights are activated.	GREEN
	Cruise Control	Indicates the cruise control is enabled. NOTE: The ICU4Me does not have a green cruise control telltale.	GREEN
	High-Beam Headlights	Indicates the high-beam headlights are on.	BLUE