Brake System Indicators and Messages
Telltales and messages appear on the driver display. The positions of the telltales vary, but most use standard symbols.
The colors of telltales indicate the hazard level as follows: red (warning), amber (caution), green (normal function), blue (active status), grey (passive status), white (informational).
The colors of messages indicate the hazard level as follows: red (warning), amber (caution), grey (informational).
Service Brake Indicators and Messages
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Service Brake Indicators |
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Telltale/Pop-Up Message |
Color |
Description |
Related Information |
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Amber |
Service Brake/Stop Light Malfunction |
This telltale alerts the driver if the rear service brake lights are not illuminated when depressing the brake foot pedal. |
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General Brake System Indicators and Messages
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General Brake System Indicators and Messages |
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Telltale/Pop-Up Message |
Color |
Description |
Related Information |
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Red |
Park Brake Alert |
This telltale illuminates when the park brakes are set. |
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Red |
Park Brake Air Low |
The air pressure in the park brake is low, which may cause the brakes to drag. |
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Red |
Park Brake Engaged |
Indicates the park brake is engaged when the vehicle is moving faster than 2 mph (3 km/h). |
Always engage the park brake before exiting the vehicle. |
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Red |
Engage Park Brake |
Indicated the park brake is not set and needs to be engaged. |
There is an optional horn warning that may sound if the park brake is not set and the doors are opened. |
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Grey |
Open Door Park Brake Interlock |
Indicates that a door is open, preventing the park brake from being released. |
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Grey |
Disengaged Service Brake Park Brake Interlock |
Indicates that the service brake needs to be applied to release the park brake. |
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Grey |
Low Air Pressure Park Brake Interlock |
Indicates the air pressure in the brake system is too low to release the park brake. |
It may take a few minutes for the air pressure to build in the brake system, and pressing the service brake too soon can reduce air pressure. |
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Grey |
Ignition Must be on to Release Park Brake |
Indicates the ignition must be on to release the park brake. |
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Red |
Rollaway Intervention Activated |
Rollaway Intervention Activated |
Pull the park brake switch to clear the warning pop-up. |
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Red |
Rollaway Intervention Active due to Open Door |
Indicates the rollaway intervention feature is active due to an open door. |
Pull the park brake switch and close the open door to clear the warning pop-up. |
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Red |
Rollaway Intervention Active due to Unoccupied Seat |
Indicates the rollaway intervention feature is active due to an unoccupied driver’s seat. |
Pull the park brake switch and sit in the driver’s seat to clear the warning pop-up. |
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Red |
Brake System Malfunction |
Solid telltale. Indicates a failure in the Brake System or Air System. Stop the vehicle and call for service. |
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Air Brake System Indicators and Messages
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Air Brake System Indicators and Messages |
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Telltale/Pop-Up Message |
Color |
Description |
Related Information |
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Red |
Brake Air Warning Low Air Pressure Warning |
Indicates low brake system air pressure. |
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Red |
Faulty Air Pressure Display |
Indicates an air pressure gauge is malfunctioning. Bring the vehicle to a safe stop and have the air system repaired before continuing. |
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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 (483 kPa). |
Automatic Traction Control Indicators and Messages
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Automatic Traction Control Indicators |
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Telltale/Pop-Up Message |
Color |
Description |
Related Information |
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Amber |
Automatic Traction Control (ATC) Active |
A flashing telltale lamp indicates a wheel spin event has been detected, and the ATC system is active. |
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Amber |
Automatic Traction Control (ATC) Deactivated |
Indicates the ATC SPIN switch has been pressed to allow wheel slip. This telltale also appears if the system air pressure drops below the threshold (85 to 90 psi [586 to 621 kPa]). If pressing the switch does not reactivate ATC, wait for the system air pressure to recuperate and build. |
Press the switch again to activate ATC. If unsuccessful, wait for air pressure to rebuild and try again. |
Vehicle Rollaway Intervention Indicators and Messages
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Vehicle Rollaway Intervention Indicators |
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Telltale/Pop-Up Message |
Color |
Description |
Related Information |
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Amber |
Rollaway Intervention System Off |
Indicates the rollaway intervention system is turned off by the optional Anti-Rollaway Off Switch. |
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Red |
Rollaway Intervention Fault |
Indicates a fault with the rollaway intervention system. If a fault with the system is detected, rollaway intervention is disabled. Take the vehicle to an authorized dealer for repair. |
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Amber |
Maintenance Mode Active Rollaway Intervention System Disabled |
Indicates the electronic park brake rollaway intervention system has been disabled to access maintenance mode. Maintenance mode allows the tires to spin during maintenance procedures. |
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