BMW ISTA+ Diagnosis PAD Mode all detailed can be found here:

What is the PAD mode onISTA?

PAD is the short form of Testing analysis diagnosis.

The PAD mode is the vehicle condition between "Residing” and "Driving”.The PAD mode corresponds to the physical "terminal 15 on”.

In the PAD mode, all the control unitsas well as all physical terminalsare on.

Why do you need the PAD mode?

A new terminal control concept was introduced to the new G12 7 series vehicle

In order to switch the vehicle into diagnosis mode (Terminal 15 in the past), either for diagnosis withISTAor programming or coding with ISTA/P, the Start/Stop button needs to be pressed 3 times in succession within .8 seconds. The vehicle will then switch over to diagnosis mode (PAD) Testing Analysis Diagnosis. In order to switch the vehicle intodiagnosticmode for the State Inspection Maintenance Program, the Start/Stop button must also be pressed 3 times in succession within .8 seconds.Additionallyif a diagnosis session is started with ISTA and the vehicle is in "Residing” mode, ISTA automatically switches the vehicle to diagnosis mode (PAD).

How to activate PAD mode:

The PAD mode is activated as follows:

– Press the START-STOP button three times within 0.8 seconds.

– Via a diagnosis order.

If you put in PAD mode before starting diagnosis, it should come up as PAD. ISTA shows PAD after doing this.

Note:During vehicle diagnosis, a vehicle with Parking-Residing-Driving is automatically placed in the pad mode.Thisis also displayed in ISTA in the top right.Thisensures that a diagnosis can be performed with all control units.

How to diagnose a BMW is ISTA PAD mode:

During vehicle diagnosis, a vehicle with Parking-Residing-Driving is automatically placed in the pad mode.Thisis also displayed in ISTA in the top right.Thisensures that a diagnosis can be performed with all control units.

How to use the selective partial network in PAD mode:

In vehicles today, there are up to 70 control units which are networked with each other.Dependingon the current vehicle condition or the user’s wishes, not all of the comfort systems and assistance systems are always required. By specifically switching off and activating the control units that aren’t required, so-called selective partial network operation, energy can be saved, the battery relieved and due tothisits life increased. For vehicles with a combustion engine, the electrical energy consumption is indirectly coupled to the fuel consumption through the alternator. Here, the selective switching off of control units that are not required can contribute to the reduction of the fuel consumption and therefore the CO2 emissions.

The master for the selective partial network operation is the Body Domain Controller (BDC).Thecontrol units which are not required are switched off via a corresponding bus signal.

In order torealisepartial network operation for control units, other transmit/receive systems are used.Thetransmit/receive systems are able to evaluate and interpret messages.Aslong there is bus communication and no valid wake-up signal for the corresponding control unit, this control unit remains switched off.Ifa valid wake-up signal for the corresponding control unit is sent on the bus, the transmit/receive system can activate the voltage regulator of the microcontroller and the control unit starts.Thecontrol unit is switched off by the deactivation of the voltage regulator.

Note:The individual partial networks can be activated and deactivated via diagnosis orders. All partial networks are active in PAD mode.

Isthere problems if usingENETcableinstead of ICOM in this mode?

Yes, only get pad resident etc, withicoma2, not withenetorusbto obd2

Source:http://blog.obdexpress.co.uk/2018/12/05/how-to-activate-ista-diagnosis-pad-mode/

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