Preparations For Standby Current Measurement
General
When the vehicle sets the communication buses and the control modules in "sleep mode", power consumption drops. Factors such as whether the vehicle is locked, the alarm is on or off or whether any doors are open affect the rate at which the vehicle will reach standby power consumption. The lowest power consumption is achieved the quickest when the vehicle is locked, the alarm is on and the vehicle's doors are closed.
There is a battery monitoring sensor on vehicles with the automatic start/stop of engine function and/or brake energy regeneration. It registers the vehicle's stand-by current consumption among other things. Stand-by current consumption can be readout and used for fault tracing.
Preparations
Ensure that all lighting is switched off.
Ensure that the diagnostic tool is not connected in the vehicle.
Open the tailgate or trunk lid and bonnet and set the locks to the deadlocked position using a screwdriver for example.
Open the driver's and passenger doors and set the locks to the deadlocked position using a screwdriver for example.
Close the rear doors, remove the key and lock and alarm the vehicle. Never use reduced alarm as it then takes longer for the CAN network to continue in "sleep mode".
Wait until the vehicle has come down in standby current consumption, which can take up to 10 minutes.
Do not open any doors or the test will have to be restarted from the beginning.
- Continue
Refer to CONNECTING THE MEASURING INSTRUMENT