Measurement Method
General
If it is clear that the power consumption is greater than the specified limit values, fault trace by successive elimination.
The method for measuring the total standby current consumption is described below.
The vehicle's standby current is measured using a multimeter.
Connecting the multimeter at the battery negative pole
When measuring the vehicle's total power consumption, connect the measuring instrument in series with the battery at the battery's negative pole.
To avoid current surges that could damage the measuring instrument when the battery cable is connected, carry out the following. Never connect the measuring instrument if the radiator cooling fan is in operation as this can damage the instrument.
- Ensure that the multimeter is equipped with two clamps.
- Check that the multimeter is set for current measurement.
- Connect the clamps to the vehicle's negative poles, as shown in the picture.
- Disconnect the ground point as shown in the picture and put something in between the ground point and the wire in order to keep the connection broken.
Check that the connections are installed correctly. If the circuit is broken, the standby current must be re-checked from the beginning
- Activate the function for reduced alarm via the Center Console Display (CCD) in order to be able to work inside the center console without risking activation of the alarm.
- Disconnect the ground point as shown in the picture and put something in between the ground point and the wire in order to keep the connection broken.
Measuring and reading off the total standby current.
Read off the standby current consumption. The total standby current should be less 25 mA.
If the car is equipped with "Volvo on call" and the standby current is too high, wait 5 minutes and measure again. The "Volvo on call" system is active for short periods and then increases the short-term standby current above the normal value.
Look and listen for unusual vehicle behavior. Check, for example, if a relay is hot, if it is this can indicate that current is flowing through it.
Check, if necessary, that CAN is in inactive mode by ensuring that the voltage on the bus is 0 V in relation to ground. Check, if necessary, that CAN is in inactive mode by ensuring that the voltage on the bus is 0 V in relation to ground.
If a fault is detected, fault-trace the relevant system. Otherwise continue fault tracing by successive elimination.