Terminal control, Parking-Residing-Driving

Terminal control, Parking-Residing-Driving (PWF) 

The logical terminal control differs from previous vehicles. From the point of view of the customer, the vehicle is always in the correct condition. The logical terminals are controlled via a customer-oriented management of the vehicle condition.

Motivation: 

Only functions that are activated or required need energy.

In the 'Residing' state, all customer functions should be available directly without first pressing the START-STOPPING button to (exception: purely driving functions). The activation and deactivation takes place directly on the corresponding operating element.

This terminal control means: Parking-Residing-Driving 

Park (rest state) 

• Customer not in the vehicle.
• Vehicle is secured or has not been used for a certain time.
• Vehicle functions cannot be operated.

Residing (operating readiness) 

• Customer in car.
• No driving readiness.
• Functions that are useful when the vehicle is stationary can be operated.

Driving (driving readiness) 

• Customer in car.
• Driving readiness established.
• All vehicle functions are available.

The vehicle condition is changed due to the customer's behavior.

Courtesy of BMW OF NORTH AMERICA, INC.

Testing-analysis-diagnosis (PAD) 

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 units as well as all physical terminals are on. The PAD mode is activated as follows:

• Press the START-STOPPING button three times within 0.8 seconds.
• Via a diagnostic order.

Assignment of the lighting functions to the PWF status 

The following overview shows how the lighting functions are assigned to the PWF status parking-residing-driving.

Display of the PWF status in the instrument cluster 

The status in parking-residing-driving (PWF status) can be seen on the tachometer in the instrument cluster.

Revolution counter	PWF status
Courtesy of BMW OF NORTH AMERICA, INC.	Park (rest state)  (with time delay if necessary)
Courtesy of BMW OF NORTH AMERICA, INC.	Residing (operating readiness)
Courtesy of BMW OF NORTH AMERICA, INC.	Driving (driving readiness)  or Testing-analysis-diagnosis (PAD mode)  (Example: hybrid vehicle)

Selective partial network operation 

Today's vehicles contain up to 70 control units that are networked with one another. Depending on the current vehicle condition or the user's wishes, not all of the comfort systems and assistance systems are always required.

Targeted switching off and turning on of unnecessary control units, the so-called selective partial network operation, can save energy, relieve the load on the battery and thereby increase the stationary period.

For vehicles with a combustion engine, the electrical energy consumption is indirectly coupled to the gas mileage through the alternator. Here, a selective deactivation of control units that are not required can contribute to a reduction in fuel consumption and CO₂ emissions.

The master for selective subnetwork operation is the Body Domain Controller (BDC) or the Basic Central Platform (BCP). The control units that are not required are turned off via a corresponding bus signal.

Other transmitter and receiver units are used to implement partial network operation for control units.

The transmitter and receiver units are able to evaluate and interpret messages. As long as there is any bus communication and there is no valid wake-up signal for the corresponding control unit, this control unit remains switched off. If a valid wake-up signal for the corresponding control unit is sent on the bus, the transmitter and receiver unit can activate the voltage regulator of the microcontroller and the control unit starts up. The control unit is switched off by deactivating the voltage regulator.

General notes 

• Terminal 15N 

  Terminal 15N is used to supply control units that are only required while driving and, if necessary, to safely end driving. During the transition from "Driving" to "Residing", an coastdown of 5 seconds starts.

• Terminal 30B 

  Terminal 30B is used to supply control units that are required when the vehicle is in stationary mode residing state and for stationary functions when the customer is not in the vehicle. During the transition from "Residing" to "Park", an coastdown of 3 minutes starts. Terminal 30B is then switched off.

• Terminal 30F 

  Terminal 30F is used to supply control units that have to perform functions in the parking state. Terminal 30F is usually turned on in the park state. However, terminal 30F can be turned off due to faults in the vehicle electrical system. If a fault is detected, the system switches off with a coastdown time of 1 minute.

• Terminal 30 

  Certain control units (for example, anti-theft alarm system) are always supplied with voltage and are not turned off for a fault.

• Terminal 30L 

  Terminal 30L is the voltage supply for the power distribution in the Body Domain Controller (BDC) or in the Basic Central Platform (BCP). Terminal 30L can be divided into a maximum of 4 sections (L1 to L4).

Diagnosis instructions 

We can assume no liability for printing errors or inaccuracies in this service information and reserve the right to introduce technical modifications at anytime.