Alerts
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| Signal Name | Description | Condition | Impact | Important |
|---|---|---|---|---|
|
Occupancy sensor short, switch button monitoring or voltage incompatibility detected.
|
Alert payload reason is detected
|
Loss of button monitoring, unparking or other features
|
No
|
|
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Dataset EEPROM may be corrupted or incorrect.
|
Problem with dataset EEPROM memory detected
|
Loss of all PPB functionality
|
No
|
|
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One of the interlocks required for PPB to Unpark is errored or invalid.
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One of the interlock sources over CAN is being reported by PPB as error or invalid
|
Unpark is not allowed
|
No
|
|
|
PPB's received vehicle speed source fault detected.
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One of the speed sources that PPB uses is showing error or invalid
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Motion state may not be able to be determined - Used in ARA, EAS
|
No
|
|
|
High side tractor solenoid short circuit detected.
|
Hardware issue detected with the high side solenoid relay
|
Loss of tractor/trailer functionality
|
No
|
|
|
Low side trailer switch short or open circuit detected - Internal to Hardware.
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Hardware issue detected with the trailer low side switch
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Loss of trailer functionality
|
No
|
|
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Low side tractor switch short or open circuit detected - Internal to Hardware.
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Hardware issue detected with the tractor low side switch
|
Loss of tractor functionality
|
No
|
|
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Trailer solenoid release pin/wire short detected.
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Short detected on the trailer solenoid release line
|
Not able to apply and release trailer park brakes
|
No
|
|
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Trailer solenoid apply pin/wire short detected.
|
Short detected on the trailer solenoid apply line
|
Not able to apply and release trailer park brakes
|
No
|
|
|
Tractor solenoid release pin/wire short detected.
|
Short detected on the tractor solenoid release line
|
Not able to apply and release tractor park brakes
|
No
|
|
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Tractor solenoid apply pin/wire short detected.
|
Short detected on the tractor solenoid apply line
|
Not able to apply and release tractor park brakes
|
No
|
|
|
Trailer pressure sensor supply pin/wire short detected.
|
Short on the trailer pressure sensor supply pin detected
|
Loss of trailer pressure sensing
|
No
|
|
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Tractor pressure sensor supply pin/wire short detected.
|
Short on the tractor pressure sensor supply pin detected
|
Loss of tractor pressure sensing
|
No
|
|
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The Pneumatic Park Brake (PPB) electronic control unit (ECU) detects a hardware condition on the occupancy sensor, or it does not receive the expected cabin door status from the Left Vehicle Controller (VCLEFT) over the Controller Area Network (CAN).
|
The PPB ECU does not receive the expected cabin door status from the VCLEFT and/or detects a hardware condition on the occupancy sensor.
|
The Anti-Rollaway feature may be unavailable.
|
No
|
|
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The Pneumatic Park Brake (PPB) electronic control unit (ECU) detects a hardware condition on the occupancy sensor, or it does not receive the expected cabin door status from the Left Vehicle Controller (VCLEFT) over the Controller Area Network (CAN).
|
The PPB ECU does not receive the expected cabin door status from the VCLEFT and/or detects a hardware condition on the occupancy sensor.
|
The Anti-Rollaway feature may be unavailable.
|
No
|
|
|
Auxillary pressure sensor may be shorted.
|
Auxillary pressure sensor becomes shorted
|
Loss of auxillary pressure sensor output
|
No
|
|
|
PCBA may be shorted internally.
|
Internal PCBA Short on PPB detected
|
Unable to preform checks on PPB
|
No
|
|
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Trailer pressure sensor may be shorted.
|
Trailer pressure sensor becomes shorted
|
Loss of ability to read trailer pressure sensor
|
No
|
|
|
Tractor pressure sensor may be shorted.
|
Tractor pressure sensor becomes shorted
|
Loss of ability to read tractor pressure sensor
|
No
|
|
|
Park Brake LV Battery voltage fault.
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Battery voltage is above 17V or below 9V threshold
|
All park brake features disabled
|
No
|