Reading Input and Output Signals

Reading input and output signals

This service can be used to read out the values and status of the control module input and output signals continuously. The parameters are divided into three predefined lists. The division is made so that parameters in list 1 and 2 are updated by the control module at the same time. The parameter values thus reflect driving conditions at the same time and are directly comparable with one another.
The following parameters can be read out:

List 1
- Wheel speed LH front wheel
- Wheel speed RH front wheel
- Wheel speed LH rear wheel
- Wheel speed RH rear wheel
- Extrapolation counter LH front wheel
- Extrapolation counter RH front wheel
- Extrapolation counter LH rear wheel
- Extrapolation counter RH rear wheel

List 2
- The car's reference speed
- The car's reference acceleration
- Wheel speed LH front wheel
- Wheel speed RH front wheel
- Wheel speed LH rear wheel
- Wheel speed RH rear wheel
- Wheel acceleration LH front wheel
- Wheel acceleration RH front wheel
- Wheel acceleration LH rear wheel
- Wheel acceleration RH rear wheel

List 3
- ABS warning light
- Brake light switch, position
- EBD pressure sensor, position

And in cars with TRACS:
- TRACS warning light
- TRACS switch
For more information on parameters see Running values, Volvo System Tester Running Values, Volvo System Tester Running values, Volvo ST.