Contents Section: Electronics - Design and Function - 1 of 4 All sections

PRIVATE LOCKING Volvo C70 II рестайлинг

Electronics - Design and Function - 1 of 4 5 illustrations ~1630 words

PRIVATE LOCKING

The private locking function prevents entry to certain areas and functions in the vehicle. The function is only available on the S40 and C70.

The key blade must be taken out of the remote control to activate this function. The function is activated by locking the glove compartment in the normal way using the key blade (turning 0 to 90 degrees) and then continuing to turn (from 90 to 180 degrees). This sets the glove compartment and trunk lid to valet mode and blocks outgoing calls on the phone module (PHM) if installed. On the C70, the ski hatch and the lockable storage compartments are also locked. A text message in the driver information module (DIM) indicates that the lock is active. The trunk lid cannot now be opened using the remote control or lock switches in the doors. The key blade is kept by the customer and the remote control can be handed to valet parking attendants or workshop staff who need access to the vehicle.

There are two lock cylinders by the lock mechanism for the rear seat backrests to ensure the degree of security required. These lock cylinders can be locked or unlocked using the key blade. There is no electrical indication that these locks are locked. The customer must check this themselves.

This function is deactivated by inserting the key blade in the lock cylinder in the glove compartment and turning it back a quarter of a turn (from 180 to 90 degrees). The trunk lid can then be opened using the remote control or central locking button.

Scheme 505

Scheme 505: OPENING THE TRUNK LID/TAILGATE

The tailgate/trunk lid can be opened in three ways

  1. via the switch on the tailgate/trunk lid if the vehicle is unlocked
  2. keyless
  3. via a switch in the center console under the mug holder (only C70).

Lock motor for tailgate/trunk is directly connected to Central electronic module (CEM). The switch on tailgate/trunk is directly connected both to Keyless vehicle module (KVM) and Central electronic module (CEM).

When the switch is pressed in, the keyless vehicle module (KVM) activates the antenna in the bumper and begins checking for an authorized key using keyless functionality. If an authorized key is found, the keyless vehicle module (KVM) transmits a signal to the central electronic module (CEM) to activate the lock motor in the trunk lid or tailgate. The tailgate/trunk lid is not opened if valet locking is activated.

There is no "unlocked" position for the lock motor for the tailgate/trunk lid. When the motor is activated, it releases the catch in the body and the tailgate/trunk lid can be opened. The tailgate/trunk lid locks when it is closed again. When the tailgate/trunk lid is to be opened, the lock motor is powered for approximately 0.5 seconds or until the central electronic module (CEM) receives a signal from the door open sensor in the lock motor indicating that it is open. If the trunk lid/tailgate is not indicated as open during this time, a diagnostic trouble code (DTC) is stored in the central electronic module (CEM).

The tailgate/trunk lid can be opened by activating the button on the remote control even if the rest of the vehicle is locked.

Scheme 506

Scheme 506: LOCKING/OPENING FUEL TANK FILLER COVER

The switch for unlocking the fuel tank filler cover is in the light switch module (LSM). The switch and lock motor are directly connected to the central electronic module (CEM). If the switch is affected, the central electronic module (CEM) is grounded and powers the lock motor which begins to function. The lock motor has a spring-loaded piston which returns to its original position after a fully completed cycle. This means that the lock motor only needs to operate in one direction.

If the function for automatic detection of fuel leakage is installed, there may be a delay of up to 1.5 seconds before the filler cover opens. This is so that the fuel tank has time to release the overpressure before the filler cover is opened. This function is only available in USA/CDN.

The interior lighting is checked by the central electronic module (CEM). The interior lighting comes on when the vehicle is unlocked.

Further light functions are included in the central locking system

  1. approach lighting
  2. approach lights.

Local lighting

Local lighting is activated using the remote control. The following light when activated

  1. interior lighting
  2. parking lights
  3. license plate lighting
  4. door mirror lighting (option).

The default setting is for the lighting to be on for 30 seconds or until the key is turned in the ignition switch. This time can be adapted to the wishes of the customer.

Approach lights

There is a function for approach lights as part of the lighting system. When the engine is off, the key is removed from the ignition and the dip switch is activated, the following lights

  1. low beam
  2. parking lights
  3. fog lamps
  4. interior lighting.

The default setting for the lighting is 30 seconds. This time can be adapted to the wishes of the customer.

Customer settings

The duration that the local lighting and approach lights are on can be adapted to the wishes of the customer.

For information about customer adaptations, see: DESCRIPTION OF PROGRAMMABLE PARAMETERS, CUSTOMER ADAPTATION

Scheme 507

Scheme 507: INDICATION OF THE STATUS OF THE DOORS AND HATCHES

There are two contact breakers in the lock units in the side doors

  1. contact breaker which indicates that the door is not closed (door open sensor)
  2. contact breaker to indicate that the central locking motor is in the locked position.

The door open sensors are connected directly to the central electronic module (CEM) from all doors.

The contact breaker for indicating the status of the central locking motor is connected to the relevant rear control module for the rear doors (only applies to the S40/V50). The rear door control modules transmit the signal on to the relevant control module in the front doors which forward the signal to the central electronic module (CEM).

The signals are used to generate error messages and diagnostic trouble codes (DTCs) if a door is not properly closed when the vehicle is driven or if locking or unlocking of one or more doors has failed one or more times.

There is only one contact breaker in the lock unit in the tailgate/trunk lid. This indicates whether the tailgate/trunk lid is open or closed.

For the C70 there is a LED in each door to indicate when the door is locked or unlocked. The LEDs are used instead of the traditional lock buttons on top of the doors. The LEDs flash for a short time after the doors have been locked or unlocked.

The vehicle can be unlocked at a distance via the service Volvo On Call.

If the keys have been locked in the vehicle or lost, the customer can call a Volvo Service Center. The vehicle's position is determined via Multimedia module (MMM) in the Telematic system and is sent to Volvo Service Center.

The customer states a code to the Service Center, which then sends a signal to the vehicle. This signal activates the central locking system for a time and on a given command the customer has to activate the switch in the tailgate. If this is done, the vehicle is unlocked.

The function is market dependent.

Scheme 508

Scheme 508: AUTOMATIC LOCKING WHEN DRIVING

Whether the automatic locking function is activated on delivery or not is market dependent. If this function is activated, the side doors lock when the speed exceeds 7 km/h (5 mph). All the doors must be closed, the engine running and the vehicle moving forward. The only exception is the tailgate/trunk lid which can be open. Information about whether the engine is running or not is transmitted by the engine control module (ECM) to the central electronic module (CEM). Indication about whether the engine is driving the car forwards is different in cars with automatic transmissions and manual transmissions. In vehicles with automatic transmissions, the position of the gear selector is received from the transmission control module (TCM). The gear selector must not be in the park (P) or neutral (N) position for automatic locking to function. In vehicles with manual transmissions, the brake control module (BCM) transmits information about vehicle speed to the central electronic module (CEM). The accelerator pedal (AP) must be partly pressed as well for automatic locking to take place.

The door can be unlocked again as normal with the central locking buttons.

Scheme 509

Scheme 509: AUTOMATIC RE-LOCKING AFTER UNLOCKING

If the car is unlocked using the remote control or key and the side doors or trunk lid/tailgate are not opened within 2 minutes, the car will be locked automatically. Whether this function is activated on delivery or not depends on the market. This function can be activated later via VIDA (Volvo scan tool) or the infotainment control module (ICM).

HINT: Comfort Closing is not available in C70, only Comfort Opening.

The Comfort Closing function can be activated from the remote control. If the central electronic module (CEM) receives repeated lock signals, corresponding to a pressed lock button for approximately 2 seconds, it will lock all doors and close the windows and sunroof.

The corresponding function (Comfort Opening) is available when unlocking the vehicle. If the central electronic module (CEM) receives repeated unlock signals, corresponding to a pressed unlock button for approximately 3 seconds, it will unlock all doors as programmed into the central locking system as well as opening all windows.

This function is not available in USA/CDN.

The tables below summarize the input and output signals to the units in the central locking system. The signal types are divided into directly connected signals, serial communication and controller area network (CAN) communication.

Input signalsOutput signals
Directly connectedDirectly connected
Switch for reduced alarm function for disengaging deadlocking Switch for valet locking of the glove compartment and cargo compartment Switch for opening the tailgate or trunk lid Switch for opening the fuel tank filler cover High/low beam switch for activating the approach lights Door open sensor Passenger door open sensor Tailgate/trunk lid open sensor Hood switch for indicating that the hood is open (cars with alarm) Signal for unlocking from the supplemental restraint system module (SRS) if the airbags are triggered.Lock motor for the tailgate/trunk lid Lock motor for the fuel tank filler cover Indicator lamp in the switch for reduced alarm, indicates that the function is activated. Indicator lamp in doors, to indicate locking/unlocking (only C70).
Via Controller Area Network (CAN) communicationVia Controller Area Network (CAN) communication
Infotainment control module (ICM) for customer adaptation Driver door module (DDM) for locking and unlocking commands Passenger door module (PCM) for locking and unlocking commands Engine control module (ECM) for information about the status of the engine Brake control module (BCM) for information about vehicle speed Transmission control module (TCM), indicates the position of the gear selector. Keyless vehicle module (KVM) Convertible Roof Module (CRM)Infotainment control module (ICM) for customer adaptation Driver door module (DDM) for locking and unlocking commands Passenger door module (PCM) for locking and unlocking commands Phone module (PHM) for unlocking via the Volvo On Call service. Keyless vehicle module (KVM) for the passive functions, locking, unlocking and starting. Convertible Roof Module (CRM)

CENTRAL ELECTRONIC MODULE (CEM) (4/56)

Input signalsOutput signals
Directly connectedDirectly connected
Indication of locked mode from the lock motor Central locking switch Switch child-proof lock (only Driver door module (DDM)) (only S40/V50)Output signal for the central locking motor Output signal for the deadlock motor Output signal for the motors for central locking and deadlocking when unlocking.
Via serial communicationVia serial communication
Via Controller Area Network (CAN) communicationVia Controller Area Network (CAN) communication
Central electronic module (CEM) for locking and unlocking commands.Central electronic module (CEM) for status information about the position of certain lock motors.

DRIVER DOOR MODULE (DDM) (3/126) / PASSENGER DOOR MODULE (PCM) (3/127)

Input signalsOutput signals
Via Controller Area Network (CAN) communicationVia Controller Area Network (CAN) communication
Information about whether the information lamp or warning lamp must be lit Information about which text message must be displayed.

DRIVER INFORMATION MODULE (DIM) (5/1)

Input signalsOutput signals
Via Controller Area Network (CAN) communicationVia Controller Area Network (CAN) communication
Central electronic module (CEM) for remote unlocking via the Volvo On Call service.Central electronic module (CEM) for remote unlocking via the Volvo On Call service.

PHONE MODULE (PHM) (16/60) (OPTION)

Input signalsOutput signals
Directly connectedDirectly connected
Lock button contact breaker for locking, in the handle on the side doors Unlocking contact breaker in the handle on the side doors, indicates that the door handle has been pulled out Unlocking contact breaker for the cargo compartment, indicates that the unlock button is pressed in. Quick lock motor contact breaker in the side doors, the motors can be activated Key-in contact breaker, indicates that the start knob is pressed in. Brake pedal switch (AUT), indicates that the brake pedal is pressed Clutch switch (MAN), indicates that the clutch pedal is pressed Unlocking switch trunk lid / tailgate.Inner antenna for communication with a key in the passenger compartment Antenna in the cargo compartment, for communication with keys External antennas in door handle (C30/C70 front doors, S40/V50 rear doors), for communication with key. External rear antenna, for communication with keys Quick lock motor left front, activating Quick lock motor right front, activating
Via serial communication (ISO)Via serial communication (ISO)
Remote keyless entry (RKE) receiver, for receiving data from keys.Remote keyless entry (RKE), control commands.
Via Controller Area Network (CAN) communicationVia Controller Area Network (CAN) communication
Central electronic module (CEM) during keyless entry Infotainment control module (ICM) when changing customer parameters.Central electronic module (CEM) during keyless entry Infotainment control module (ICM) for customer adaptation

KEYLESS VEHICLE MODULE (KVM) (4/93)

Input signalsOutput signals
Directly connectedDirectly connected
5 electric motors for controlling the lockable storage compartments: Motor ski hatch (8/139) Motor, storage compartment, driver's door (8/137) Motor, storage compartment, passenger door (8/138) Motor, storage compartment, side panel, left rear (8/140) Motor, storage compartment, side panel, right rear (8/141)
Via Controller Area Network (CAN) communicationVia Controller Area Network (CAN) communication
Central electronic module (CEM) during keyless entry

CONVERTIBLE ROOF MODULE (CRM) (4/59) (ONLY C70)