Ford Workshop Service and Repair Manuals

Convertible

RKE systems use mechanical/electrical door latches individually controlled by the corresponding door control module.

Door control modules send and receive commands between each other and the CJB using the central area network (CAN) bus.

When a key is turned in the door lock cylinder, a lock or unlock signal is sent to the associated door control module. The door control module sends a signal to the CJB. The CJB issues a signal to the remaining door control modules, which in turn command the latches to operate.

RKE is achieved by the transmission of a coded RF signal from a transmitter contained in the vehicle key. The signal is received by the RF receiver located above the headliner in the vicinity of the overhead console. The received signal is passed onto the CJB where it is decoded. If the coded signal is valid, the CJB will issue a command on the CAN bus circuit to operate the door latches or liftgate/luggage compartment lid release.

The signals received by the CJB from the RF antenna or the door control modules is also used to arm and disarm the vehicle security systems, illuminate the interior lights and operate the global closing functions.

Liftgate/Luggage Compartment Lid Latch

The liftgate/luggage compartment lid latch is a mechanical latch with a electric motor to drive the latch release. The liftgate/luggage compartment lid latch has no remote mechanical release facility.

The command to open the liftgate/luggage compartment lid latch is sent by the CJB. But the input command to the CJB can be issued by the exterior liftgate/luggage compartment lid release switch, the interior liftgate/luggage compartment lid release switch or the RF receiver.

When the liftgate/luggage compartment lid is closed, the latch is automatically locked.

Door latch

Door latches have mechanical latch release with electric motor operated locking and double locking function.

When the door latch is locked, the exterior door handle is disengaged from the door latch.

Incorporated within the door latch is a door ajar switch. The door ajar switch monitors the latch position and supplies information to the door control module. This information is sent to the CJB for use in warning systems, locking functions and alarm system.

Vehicles with Keyless Vehicle System

Convertible

General

The system is designed to eliminate the need to use any form of key.

The basic function of the system is to allow the operator to gain entry to and operate the vehicle without the turning of keys or the pressing of buttons. This must be achieved without compromising the security or safety of the vehicle.

To gain access to the vehicle, a passive vehicle key must be about the person that is trying to gain access. At a distance of approximately 2 meters from the keyless antenna built into the exterior door handle or the rear exterior keyless antenna located behind the rear bumper cover, the passive vehicle key can receive a low frequency (LF) challenge to confirm its identity.

The vehicle system will not attempt to challenge the coded passive vehicle key, until a door handle is pulled or the liftgate/luggage compartment lid release switch is pressed. This reduces the current drain on the vehicle battery during the armed condition.

To lock the vehicle, all doors must be closed and a passive vehicle key coded to the vehicle must be in range of the exterior keyless vehicle antenna before the lock button on the exterior door handle or liftgate/luggage compartment lid is pressed.

To minimize the risk of scanning during the use of the passive key, the system is equipped with a rolling code. This means that the code received by the keyless vehicle module changes after each successful operation.

The start function is also controlled by the passive vehicle key. If the clutch pedal on manual vehicles or brake pedal for automatic vehicles is pressed, the keyless vehicle module will challenge the passive vehicle key using the interior keyless antenna and allow the steering column lock control unit to release. This allows the operator to rotate the ignition switch turning knob and start the engine.

The passive anti theft system (PATS) is disarmed when the passive vehicle key emergency key transponder is read by the PATS transceiver during the starting function.

Passive vehicle Key

The passive vehicle key is designed to be unobtrusive and robust.

The primary function of the passive vehicle key is to receive requests from and transmit coded signal to the keyless vehicle module. Concealed within the passive vehicle key, is an emergency mechanical key.

The mechanical key when removed from the passive vehicle key can be used to open the driver door to gain access to the vehicle. The mechanical key must be assembled to the ignition switch turning knob insert before it can then be used to release the steering lock and start the engine.

The passive vehicle key also has remote keyless entry (RKE) functionality.

RKE permits the operator to unlock and lock the vehicle and release the liftgate/luggage compartment lid from a location remote from the vehicle.

Steering Column Lock Control Unit

The steering column lock control unit operates the same as the standard key operated steering lock but also has the added functionality of a solenoid operated ignition lock cylinder release.

Under the correct conditions, the ignition lock cylinder will be released and allowed to rotate to the accessory, run and start positions.

To achieve the correct conditions,

• A valid passive vehicle key must be detected by the keyless vehicle module within the vehicle
• The brake pedal in automatic transmission vehicles must be pressed and the clutch pedal in manual transmission vehicles must be pressed
• The ignition switch turning knob must be pressed in

Only when all of these conditions are met, can the ignition switch turning knob be rotated, so rotating the ignition lock cylinder and releasing the steering lock.

If the emergency key is inserted into the ignition switch turning knob, the steering column lock control unit detects the key and the keyless vehicle system is disabled.

Interior Keyless Antenna

The interior keyless vehicle antenna function is to transmit a LF signal to the passive vehicle key while it is inside the vehicle passenger compartment.

If at any time the passive vehicle key leaves the passenger compartment while the vehicle is unlocked or the ignition switch turning knob is in the accessory, run or start position, the interior keyless vehicle antenna will loose the signal from the passive vehicle key and the keyless vehicle module will indicate in the instrument cluster warning display, that no passive key is present in the vehicle.

There are 4 keyless vehicle antennas installed within the vehicle. They are located in the front and rear of the floor console, behind the rear seat backrest and in the loadspace rear panel.

Liftgate/Luggage Compartment Lid Lock Switch

The liftgate/luggage compartment lid lock switch is located in the licence plate illumination panel and can be used to lock the entire vehicle.

When the liftgate/luggage compartment lid lock switch is pressed, a challenge is sent to the passive vehicle key, if the passive vehicle key is valid, a signal triggers the keyless module to initiate the central locking.

Exterior Door Handle Keyless Vehicle Antenna and Lock Switch

The exterior door handle keyless vehicle antenna and lock switch is a combined unit that is seen simply as the exterior door handle lock switch.

The function of the lock switch is to send a signal to the keyless vehicle module to indicate the intent to lock the vehicle.

The function of the exterior door handle keyless vehicle antenna is to challenge the passive vehicle key within a pre-defined area of the front exterior door handle.

Keyless Vehicle Module

The keyless vehicle module is located in the loadspace trim panel area. Its function is to interface with the components that comprise the keyless vehicle system. These include:

• Door latches and integral motors
• Instrument cluster liquid crystal display (LCD)
• Exterior door handle keyless vehicle antenna
• Exterior door lock buttons
• Interior door lock button
• Liftgate/luggage compartment lid lock switch
• Interior keyless vehicle antennas
• Steering column lock control unit

Communication between the component and the keyless vehicle module is predominantly by hard wire as this reduces the delay in communication between components. But the medium speed central area network (CAN) bus is used where it is adequate.

Door Latch

Keyless vehicle door latches incorporate an extra electric motor to replace the exterior door handle mechanical latch release function during keyless vehicle system operation.

In the event of mechanical key operation, the normal latch exterior door handle linkage will be utilized.

Instrument Cluster

The instrument cluster displays the keyless vehicle system state in the LCD warning display.

The instrument cluster also acts as the interface between the PATS transceiver, powertrain control module (PCM) and keyless vehicle module.