Telltale Warnings and Messages

Blue

Charger Connected to Vehicle

A flashing telltale indicates the vehicle is actively charging.

Solid illumination indicates the desired SOC has been reached and that the charger is connected to the vehicle.

When a charging coupler is plugged into the vehicle, the vehicle's ability to drive is inhibited.

Blue

Powertrain Active

Signals that the ePowertrain is activated and the vehicle is ready to drive.

If a door is opened when the parking brake is disengaged and the powertrain is active, a popup appears.

Amber

Low-Voltage Battery Problem

A low-voltage battery problem has been detected.

Red

Low-Voltage Battery Failure

The low-voltage batteries have failed or cannot be detected.

White

High-Voltage Battery Charge Normal Operation

The high-voltage batteries have a high enough charge to operate the vehicle.

Amber

High-Voltage Battery Charge Low

Indicates an state of charge warning is active.

Turn off unneeded features drawing power.

Drive the vehicle for 30-60 minutes, or manually charge the low-voltage batteries.

Amber

High-Voltage Battery Problem

Indicates a non-critical battery fault, such as one of the high-voltage batteries going offline.

Take the vehicle in for service.

Red

High-Voltage Battery Failure

A thermal event has been detected inside a high-voltage battery.

Bring the vehicle to a safe stop, apply the park brake, turn the keyswitch to off, and exit the cab within the next five minutes.

If there is time, press in the eStop button.

The vehicle must be on for the high-voltage battery thermal event detection system to be active.

Amber

ePowertrain problem

A high-voltage battery or ePowertrain problem has been detected.

A derate program has been activated or the driving range has been reduced.

Take the vehicle in for service.

Red

ePowertrain Error

A high-voltage battery or ePowertrain problem has been detected. Stop immediately.

Amber

eDrive problem

An eDrive problem has been detected

Red

eDrive error

And eDrive error has been detected

Green

Recuperative Braking

Indicates recuperative braking has been activated by moving the right-hand multifunctional control stalk into position 1, 2, or 3 (low, medium, or high).

A blue line will appear on the charge portion of the power gauge showing the amount of available recuperative braking requested.

Green

Descent Control Mode

Indicates descent control mode is active.

The driver should always be ready to intervene by applying the service brakes. On steep roads recuperative braking may not be able to maintain the vehicle set speed.

Amber

Hill Start Aid Disengaged

A blinking telltale indicates hill start aid is inactive.

A solid telltale indicates a fault with the system.

To turn on HSA, press the HSA OFF switch again or cycle the vehicle keyswitch.

Grey

Brake Hold Mode Engaged

Indicates brake hold mode is active.

The service brake will be maintained when the driver takes their foot off the brake pedal.

Brake hold mode is released when the accelerator pedal is pressed, the work brake is set, or the park brake is set.

Red

Park Brake Engaged

Indicates the park brake is engaged.

Always engage the park brake before exiting the vehicle.

Red

Low Brake Air Pressure

Indicates air pressure in the primary or secondary reservoir has dropped below approximately 70 psi (483 kPa).

Bring the vehicle to a safe stop and have the air system repaired before continuing.

A buzzer will sound if the park brake is released or the vehicle is moving when the air pressure has dropped below 70 psi.

Amber

Tractor Anti-Lock Braking System (ABS)

Momentary illumination indicates the vehicle ABS is engaged.

Solid illumination indicates a problem with the vehicle ABS.

Repair the ABS to ensure full braking capability.

Even if the ABS is completely inoperative, normal braking ability is maintained.

Amber

Automatic Traction Control (ATC) Active

A flashing telltale lamp indicates a wheel spin event has been detected, and the ATC system is active.

Amber

Automatic Traction Control (ATC) Deactivated

Indicates the ATC SPIN switch has been pressed to allow wheel slip.

Press the switch again to active ATC.

Red

Brake System Warning

Solid telltale.

Indicates a failure in the Antilock Braking System/Electronic Braking System (ABS/EBS) or the electronic air processing unit (EAPU).

Stop the vehicle and call for service.

Green

Adaptive Cruise Control (ACC) Active

Indicates that adaptive cruise control is on and active.

Amber

Adaptive Cruise Control Unavailable

Indicates that Adaptive Cruise Control (ACC) is not available

Amber

Active Brake Assist Unavailable

Indicates the Active Brake Assist system is not available.

Amber

Lane Departure Warning Unavailable

Indicates that lane departure warning is disabled due to minimum speed, lack of lane markings, or system not being available.

Blue

Lane Keep Assist (LKA) Active

Lane Keep Assist is on and making micro-steering adjustments to keep the vehicle in the preferred lane position.

When Lane Keep Assist is off there is no steering wheel telltale.

Lane Keep Assist (LKA) is a component of Active Lane Assist (ALA).

Grey

Lane Keep Assist (LKA) on but inactive

Lane Keep Assist is on but inactive. Reasons for inactivity include:

• Lane markings cannot be identified.

• There has been a significant change in load with the ignition switched on.

If Adaptive Cruise Control (ACC) is not available, Active Lane Assist (ALA) is not available. Lane Keep Assist (LKA) is a component of ALA.

Red

Auto Stop Active

When Auto Stop activates at the end of the Lane Keep Assist warning cascade, the Auto Stop telltale appears.

When Auto Stop has brought the vehicle to a standstill, the Auto Stop telltale clears.

The Auto Stop warning window: "Auto Stop Started Throttle to Cancel" appears when Auto Stop initiates.

Amber

Low Coolant Level

The battery coolant level is low.

OR

The eDrive coolant level is low.

Fill the low cooling system reservoir at the first opportunity.

A pop-up message will specify which coolant level is low.

Red

Very Low Coolant Level

The battery coolant level is very low.

OR

The eDrive coolant level is very low.

Stop the vehicle and fill the low cooling system reservoir.

A pop-up message will specify which coolant level is low.

Amber

Electro-hydraulic Power Steering (EHPS) Error

One reason this telltale appears if is the power to the EHPS pumps exceeds a set current level.

Amber

Electronic Stability Control (ESC) Active

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

Electronically Controlled Air Suspension (ECAS) Error

Indicates and active ECAS fault.

Amber

IPPC Error

Green

AERO active

Indicates that aerodynamic height control (AERO) is active.

Red

Tire Pressure Monitoring System (TPMS) Warning

At least one tire has very low tire pressure, very high tire pressure, or a high tire temperature.

The TPMS screen will highlight which tire and what the issue is.

Amber

Tire Pressure Monitoring System (TPMS) Caution

At least one tire has high tire pressure or a TPMS battery is low and needs to be replaced.

The TPMS screen will highlight which tire is affected.

Red

Unfastened Seat Belt

Indicates the driver's seat belt is unfastened.

When the system detects that the parking brake is off and the driver seat belt is not fastened an audible alert activates.

Amber

Supplemental Restraint System (SRS) Error

Indicates a malfunction has occurred in the restraint system and restraint system components may be triggered unintentionally or may not deploy as intended during an accident.

If the SRS telltale appears, have the restraint system checked and repaired immediately.

White

Left-Hand Door Unlatched

Indicates the left-hand door on two door cab is unlatched.

White

Right-Hand Door Unlatched

Indicates the right-hand door on two door cab is unlatched.

White

Both Doors Unlatched

Indicates both doors on a two door cab are unlatched.

Green

Right-Turn Indicator On

Flashing indicates the right-turn signal lamps are activated.

Green

Left-Turn Indicator On

Flashing indicates the left-turn signal lamps are activated.

Blue

High-Beams On

Indicates the high-beam headlights are on.

Green

Low-Beams On

Indicates the low-beam headlights are on.

Blue

Automatic High-Beams On

Indicates the high-beam headlights have been set to automatic and are on.

Grey

Automatic High-Beams Off

Indicates the high-beam headlights have been set to automatic and are off.

Green

Automatic Low-Beams On

Indicates the low-beam headlights have been set to automatic and are on.

Grey

Automatic Low-Beams Off

Indicates the low-beam headlights have been set to automatic and are off.

Green

Taillights / Marker Lamps On

Indicates the taillights, aka marker lamps, are on.

White

Snowflake

Indicates ambient air temperature has dropped below 34°F (1°C).

Pay attention to road conditions and watch for ice.

ICUC Caution

Blue

Active Phone Call

Indicates a phone is connected to the ICU and a call is active.

The phone screen in the infotainment section of the ICU will also show an active call, including the number being called and call length.

Blue

Software Download Available

Indicates a software download is available.

For reasons of security and optimal vehicle functioning, software updates should be quickly installed.

A pop-up message will also appear.