Description of Parameters

Description of parameters

Parameters, status

Stop (brake) warning lamp




The value indicates the stop (brake) warning lamp status.
OFF: The warning lamp is out
ON(cont): The warning lamp is lit
ON(audible): The warning lamp flashes

ABS warning lamp




The value indicates ABS warning lamp status.
OFF: The warning lamp is out
ON(cont): The warning lamp is lit
ON(audible): The warning lamp flashes

Spin warning lamp




The value indicates the spin warning lamp status.
OFF: The warning lamp is out
ON(cont): The warning lamp is lit
ON(audible): The warning lamp flashes

Stop (brake) lamp switch




The value indicates the stop (brake) lamp switch status.
OFF: The stop (brake) lamp switch is not activated.
ON: The stop (brake) lamp switch is activated

STC switch
The value indicates the STC switch status.
OFF: The STC switch is not activated
ON: The STC switch is activated

STC switch indicator
OFF: The lamp is not activated.
ON(cont): The lamp is lit constantly
ON(audible): The lamp flashes
The value indicates the status of the STC switch indicator.

Parameters, value

Wheel speed




Measurement range: 0- 653.8 km/h.
The engine control module (ECM) derives wheel speed from the relevant wheel sensor signal.

Extrapolation counter
Measurement range: 0- 255
The normal value if the car is driven should be 0. The extrapolation counter calculates if the number of wheel speed changes are higher than the number allowed.
If the signal from the wheel sensor is affected by electromagnetic interference, varies too much or is affected by short intermittent open-circuit/short circuits, the control module can interpret it as a speed change and the counter will begin updating. When the control module registers that speed changes are within the permitted values the counter value will reduce again.

Wheel acceleration
Measurement range: - 1.28 - +1.27g
Positive value: acceleration
Negative value: deceleration
The control module derives the wheel acceleration/deceleration from the relevant wheel sensor signal.
The value can vary a great deal depending on the road surface An uneven road gives greater variation.

Vehicle reference speed
Measurement range: 0- 653.8 km/h
The control module derives the reference speed from all the wheel sensor signals.

Vehicle speed CAN signal
Measurement range:0.60- 653.80 km/h
The control module derives the vehicle speed based on the wheel sensor signal and transmits it over the Control area network (CAN).
The vehicle speed signal which is transmitted over the Control area network (CAN).

The vehicle acceleration
Measurement range: -1.28 - +1.27g
Positive value: acceleration
Negative value: deceleration
The control module derives the reference acceleration/deceleration from the relevant wheel sensor signal.

The brake disc temperature
Front brake disc temperature.
Measurement range: 0.0-450°C (32-842°F)
The control module derives the brake disc temperature depending on the length of time the anti-spin system has been operating or the ABS has been activated.

Power supply
ABS control module power supply.
Measurement range: 0- 16 V