Bus Dashboard Symbols

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Drive battery voltage gauge: Normal drive battery voltage ranges from 250 to 370V. The gauge changes color to red when the drive battery voltage goes too low or high | Motor temperature: Vehicle motor temperature ranges from -40° to 302°F The gauge changes color to red when the motor temperature goes too low or high | |
| 12V battery gauge: Vehicle 12V voltage gauge ranges from 0 to 16V. The gauge changes color to red when the 12V battery voltage goes too low or high | Low 12V voltage indicator: Illuminates when 12V (auxiliary) battery charge is low | ||
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Vehicle battery temperature: Vehicle battery temperature gauge ranges from -40° to 176° F. The gauge changes color to red when the battery temperature goes too low or high | ![]() |
Vehicle battery temperature: Vehicle battery temperature gauge ranges from -40° to 176° F. The gauge changes color to red when the battery temperature goes too low or high |
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Traction control indicator: This indicator will turn on when the traction control is activated. When the traction control is off, this indicator will show traction off indicator as well | ![]() |
Speedometer digital number: Vehicle speed in miles per hour |
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Motor problem indicator: Illuminates when there is a problem with the vehicle drive train. Seek vehicle service immediately | Headlight indicator: Illuminates when the vehicle headlights are on | |
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Brake pedal indicator: Illuminates when the brake pedal is engaged |
Low beam indicator: Illuminates when the vehicle headlights are dipped (i.e. when low beam headlights are on) |
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Low vehicle battery indicator: This indicator will turn on when the high-voltage traction battery charge is below 20% |
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High beam indicator: Illuminates when the vehicle headlights are on full beam (i.e. when high beam headlights are on) |
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Door open indicator: When driver or passengers of doors are open, this icon will indicate the door open statues |
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Fog light indicator: Illuminates when the vehicle fog lights are on |
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Regen brake indicator: This indicator will turn on when the regen brake is on. Avoid hard braking when regen is active |
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BMS malfunction indicator: Illuminates when there is a problem with the Battery Management System. Seek vehicle service immediately |
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Hazard warning indicator: Flashes when the vehicle hazard lights are on |
OBC malfunction indicator: Illuminates when there is a problem with the On-Board Charging System. Seek vehicle service immediately |
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Battery SoC indicator: Battery SoC) indicator ranges from 0 - 100%. The gauge color changes to red when the battery SOC goes below 20%. When the vehicle is charging, the gauge color changes to green |
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PTC malfunction indicator: Illuminates when there is a problem with the Pressure Temperature Current switch. Seek vehicle service immediately |
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Turn gignal (left): Flashes when left hand turn signal light is flashing |
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DCDC malfunction indicator: Illuminates when there is a problem with the DC-to-DC Converter. Seek vehicle service immediately |
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Turn signal (right): Flashes when right hand turn signal light is flashing |
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ACCM malfunction indicator: Illuminates when there is a problem with the Air Conditioning Control Module. Seek vehicle service immediately |
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SWP malfunction indicator: Illuminates when there is a problem with the Steering Wheel Pump. Seek vehicle service immediately |
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J1939 DM1 amber warning Indicator: This lamp signals less critical faults and vehicles need not be immediately stopped. The lamp will flash slowly, quickly, or remain ON depending on the severity of the fault |
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J1939 DM1 red stop lamp: This lamp indicates serious faults that require the vehicle to stop. The lamp will flash slowly, quickly, or remain ON depending on the severity of the fault | ![]() |
J1939 DM1 protection indicator: This lamp indicates faults in non-electrical systems (e.g., high hydraulic fluid temperature) The lamp will flash slowly, quickly, or remain ON depending on the severity of the fault |
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J1939 DM1 malfunction indicator: Malfunction Indicator Lamp (MIL) shows malfunctions related to electric drivetrain. The lamp will flash slowly, quickly, or remain ON depending on the severity of the fault |

- Eco mode
- Performance mode
- Battery SoC
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Seatbelt warning light
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Air Bag warning light
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Regenerative braking
For additional details on the Optimal buses, please refer to the Optimal Safety and Operators Guide




















