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Home >> Volvo >> 2004 >> V40 Base >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System - Design And Function >> Diagnostic Functions (2000-2004) >> Reading off the Volvo on-board diagnostic (OBD) system >> Reading off parameters
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Reading off parameters

NOTE: The car should be driven to obtain the relevant values.
No.  Parameter and status value  Remarks 
1
2
3
4
SP LF
SP RF
SP LR
SP RR
km/h
Wheel speed left front wheel
Wheel speed right front wheel
Wheel speed left rear wheel
Wheel speed right rear wheel
Measurement range: 1.75-300 km/h
The control module derives the wheel speed based on the signal from each wheel sensor
5 BRAKES
ON/OFF
Status of the stop (brake) lamp switch.
OFF= The stop (brake) lamp switch is not activated
ON= The stop (brake) lamp switch is activated
The signal from the stop (brake) lamp switch is used so that the control module is in standby mode for ABS control during braking.
6 PUMP MOTOR
ON/OFF
Pump motor status
OFF= The pump motor is not activated
ON= The pump motor is activated
7 VALVE RELAY
ON/OFF
Status of the valve relay in the control module
OFF= The valve relay is not activated
ON= The valve relay is activated
The inlet and outlet valves are supplied with voltage when the valve relay is activated.