Reading Input and Output Signals

Using this function of the Volvo Scan Tool the values and status of the control module input and output signals can be continuously read off.

The following parameters can be read off:
- Vehicle speed, value
- Fuel level signal to needle, value
- Fuel level signal from sensor, value
- Engine coolant temperature (ECT), value
- Engine speed (RPM), value
- Generator (GEN) charge voltage D+, status
- Oil pressure in engine, status
- Fuel level warning lamp, status
- Service reminder indicator (SRI), status
- Outside temperature warning lamp, status
- 12 pulse vehicle speed signal, status
- 48 pulse vehicle speed signal, status
- Vehicle speed signal to speedometer, status
- Outside temperature, signal from sensor, value
- Outside temperature, signal from control module, value
- Fuel flow signal, value

NOTE: When the lamp check function is carried out, the parameters low fuel level and service reminder indicator (SRI) are not updated.

To obtain the relevant values the 12-pulse and 48-pulse vehicle speed signals should be read off when the front wheels are rotating.

For further information about parameters, Volvo Scan Tool Scrolling Values