Ford Falcon. Manual - part 394

419-10-4 

Body Electronics Module (BEM) 

419-10-4

DESCRIPTION AND OPERATION (Continued)

Normal Mode (Battery Saver On, Courtesy Off)

Door and Boot Ajar Status

The battery saver circuit will be in normal mode; when The BEM will report the ajar status of the four Doors

the BEM is powered up or reset, by removing and

and Boot individually via the CAN bus.

replacing the BEM fuse; it will be in Normal Mode.

Manual Boot/Tailgate Release

Normal mode will be entered from saver mode if the

ignition key is turned from off to the accessories,

The manual boot/tailgate release switch is enabled

ignition or start position, a door is opened then closed, when any door is unlocked or battery saver is active.

operating the remote key door or boot functions.

The switch is disabled 10 minutes after ignition off if

all doors locked. When pressed the BEM will output a

Saver Mode (Battery Saver Off, Courtesy Off)

12 Volt pulse to the release solenoid for a period of

The BEM will go into saver mode after 15 minutes

0.8 seconds. No output is available if the vehicle

with the ignition in the off position as long as the last

speed exceeds 12 km/h. If no CAN speed data is

event of opening and closing a door has occurred. It

available then the BEM will default to 0kmh and the

may also enter saver mode 15 minutes after pressing release function will be enabled.

the door lock button, unlock button, panic button or

Remote key Boot /Tailgate Release

boot button whichever occurred last.

Pressing the boot release button the BEM will output

Courtesy Mode (Battery Saver on, Courtesy On)

a 12 volt pulse of 0.8 seconds in duration to the

The transition from normal mode to courtesy mode

release solenoid. It will also cause the hazard lamps

can occur with ignition key out of the lock, Door

to flash once for a duration of 1.6 seconds. The

opened. Remote key unlock command, boot unlock,

courtesy lamp will illuminate for 20 seconds then fade

panic or dash switch with a one second fade in. The

for 6.4 seconds.

transition back to normal mode from Courtesy mode

Central Locking

can occur after remote key lock command, Ignition

key from off to Ignition, Accessories or start position

Manual Central Locking Functions

or the dash switch with a one-second fade out. If the

Manual central locking can be initiated by the

BEM is in courtesy mode due to a boot open

following actions:

command, when the doors are closed and the ignition

is off the BEM will enter Exit mode.

Pressing the central door-locking switch once will lock

the doors if unlocked, pressing the switch again will

Dash Mode (Battery Saver on, Courtesy On)

unlock the doors. Inserting the mechanical key into

The courtesy lamp may be turned on via the CAN bus the driver’s door exterior lock will unlock only the

by holding the dash switch in the on position for 1

driver’s door. To open the passenger doors press the

second. To turn off hold the dash switch for 1 second

central locking switch with the driver’s door open. If

with the door closed, a one-second fade will occur

the drivers door is closed after a manual unlock then

when the BEM returns to Normal Mode.

pressing the central locking switch will first lock the

drivers door then a second press will unlock all doors.

Exit Mode (Battery Saver On, Courtesy On, Exit

If the soldier button is pressed downwards then all

Delay 20 secs. 6.4 Secs Fade)

doors will lock. If drivers door opens when soldier

This mode is entered from courtesy mode with the

button pressede all doors will unlock the soldier

action of closing the boot or closing the doors with the

button. Opening the interior door handle half way will

ignition off. The BEM will return to courtesy mode if

unlock the driver’s door. Unlocking any passenger

during the delay or fade period a door is opened, a

interior door lock handle will unlock all doors. If the

door is unlocked or a remote key (except lock)

driver’s door is slammed when in the locked mode,

command is received. On completion of the exit

the BEM will command a driver’s door unlock.

mode, the BEM will resume normal mode.

In the event of a crash signal being received by the

Door Trigger Disable Mode, Courtesy off)

BEM from the airbag system via the CAN bus, an

unlock all doors will be actioned. During a power up or

This mode may be entered from any other mode by

reset, the status of the doors will be unchanged to

holding the dome dash switch for a period of 5

avoid a lock out action.

seconds. It does not require any wiring modifications

to be undertaken. To restore normal operations again

Remote Central Locking Functions with Boot

hold the dome dash switch for 5 seconds.

Release and Panic Alarm

NOTE: Police and Taxi Mode can be set under

Remote entry and panic functions only operate with

personalised settings in WDS.

the ignition switch in the off position. Two modes of

These settings control horn (control by BEM) courtesy operation are possible, Two stage unlocking or single

lamp enabling, battery saver control, & taximode of

stage unlocking. This feature may be activated or

door locks.

deactivated for each remote key programmed to the

vehicle. To toggle between these modes hold the lock

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Body Electronics Module (BEM) 

419-10-5

DESCRIPTION AND OPERATION (Continued)

and unlock buttons down simultaneously for a period

then change back again. Then teach the next key and

of 3 seconds. In two stage unlock, pressing the unlock so on. As each key is taught, the door locks will cycle.

button once will unlock the driver’s door, the hazards

Turning the ignition switch to off or on position will exit

will flash once, a second press or holding down button teach mode. Again the door locks will change state to

for 3 sec. will unlock the remaining doors and again

indicate the mode has been exited.

flash the hazards once. In single stage unlocking,

NOTE: it is important that all keys that are to be

pressing the unlock button, will unlock all doors and

taught to the system are taught in the same teach

flash the hazards once. In both modes pressing the

sequence.

lock button, will lock all doors and flash the hazards

twice.

Seat Memory and Priority Key Control (High

Series)

Pressing the panic button will activate the panic alarm

for a period of 30 seconds, unless the ignition is

On the high series vehicle, the priority key control is

turned on or the panic button is pressed a second

activated when the driver’s door is unlocked with a

time. The hazards will flash and the horn will sound at remote key. The BEM is able to identify the remote

a frequency of 5 Hz while the panic function is active. key by the order they were taught to the BEM. When

the BEM identifies the key used it sends data to the

Pressing the boot/tailgate, release button will output a

seat module via pins J2/22 (seat memory data) and

12 volt pulse for 0.8 seconds. A hazard flash of 1.0

J2/23 (seat memory enable). Data stored in the seat

second is enabled via the CAN bus.

memory is acted upon according to the remote key

A confirmation of door lock is possible by pressing the

number.

remote lock button; if locked the horn will bip 0.016

sec and a hazard Flash of 0.5 secs.

Automatic Headlamps with Twilight Sensing and

When a door is open then a door ajar will be detected Delayed Turn-Off

or a transponder key is detected in the ignition, a door Setting the headlamp switch to the automatic position

lock attempt will result in the horn issuing a door ajar

allows the BEM to control the headlamp relay from

warning of 8 pulses in rapid succession. The BEM will ambient light information from the twilight sensor,

action a door unlock, the hazards will flash two long

ignition switch and the driver’s door. The headlamp

and two short pulses, the Cluster smartshield warning switch is ignored in automatic mode.

jewel will be turned on and the courtesy lamp will be

To avoid the headlamps being turned on and off by

on. If a successful lock is achieved then the system

sudden changes in light level ie moving trees, moving

will revert to normal operation.

cars etc, The BEM uses a combination of hysteresis

Automatic Door Relock

and delay strategies. When the ignition switch is in the

accessories or ignition on position, the BEM

If a remote key is used to unlock the doors and no

headlamp relay output driver is controlled by changes

door is opened, the ignition is not turned on. The

in ambient light level. The BEM also controls the relay

doors will automatically relock after 45 seconds.

to provide a headlamp delay when the ignition is

RF Remote Key

turned from on to off and it is dark. If the driver’s door

is opened within the delay period then the time is

The RF remote key signals are received by the RF

shortened.

receiver module all the time. The data is only passed

to the BEM, when the ignition is in the off position,

Case

Twilight

Ignition /

Driver

BEM

and the remote key has been trained to the BEM. If

Sensor

Accessory

Door

Headlamp

the Receiver receives a number of invalid

status

Relay Output

transmissions, it is possible for the receiver to

1

Light

On

N/A

Off

resynchronise to a single remote key. If a remote key

2

Light to

On

N/A

Delayed On

has not been used for a long time, the receiver may

Dark

to Off 2 secs

not respond, should this happen, press the remote

key button 3 times in succession and it will be

3

Dark to

On

N/A

Delayed Off

resynchronised to the receiver.

Light

to On 15

secs

RF Remote Key Teach (up to 8 keys)

4

Light

On to Off

N/A

Off

To enter teach mode turn the ignition switch from off

5

Dark

On to Off Closed Delayed On

to accessories and within 5 seconds press the rear

to Off 120

demist switch 3 times; remote key teach mode will be

secs

entered. When the mode is entered then the door

6

Dark

On to Off

Open Delayed On

locks will change state.

to Off 20

Once the mode is entered then all the remote keys

secs

will be erased. To teach the keys press any remote

7

Light

Off

N/A

Off

keys button; to acknowledge the new key has been

stored in memory the door locks will change state

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Body Electronics Module (BEM) 

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DESCRIPTION AND OPERATION (Continued)

Case

Twilight

Ignition /

Driver

BEM

the light condition is BRIGHT the BEM will respond by

Sensor

Accessory

Door

Headlamp

setting a delayed turn off.

status

Relay Output

Electronic Immobilisation

8

Light to

Off

N/A

Off

The immobilisation interfaces with four systems in the

Dark

vehicle, the associated components are as follows:

9

Dark

Off

Closed If already on,

to

then delay

Ignition key with embedded Digital Signature

Open 20 secs from

Transponder (DST). The ignition key also has a

On to Off

mechanical encoded key and electronic

transponder technology. The ignition key is the

10

Dark

Off

N/A

Off

authority to start and drive the vehicle. For the

11

Dark to

Off

N/A

Off

BEM to respond the ignition key must be inserted

Light

into the ignition lock and the transceiver antenna

12

Light

Off to On

N/A

Off

field.

The Auto headlamp control has a number of inbuilt

Transceiver Ignition lock assembly (TILA): The

safety features to ensure that the headlamps remain

TILA in addition to the steering lock, ignition and

operational even if a connector is disconnected whilst

starter functions interfaces the ignition key (DST)

running.

and the BEM through the transceiver circuit. The

It is possible to adjust the Auto Headlamp Transitions

TILA consists of a transceiver and a transmit and

from Off to On in Diagnostics Mode from the factory

receive antenna attached to the lock barrel. The

default setting. Adjustment of the on to Off transition

antenna is used to transmit to and receive date

can also be selected in diagnostics mode.

from the transponder.

There are 8 possible setting available in each mode.

Body Electronics Module (BEM): The BEM is

responsible for verifying that the DST ignition key

The System performs diagnosis of the twilight sensor

is valid by issuing a challenge and the receiving a

and the output circuitry via a dedicated feedback.

response; this received data is then compared

Diagnostics runs independently of the main Auto

with the values stored in the BEM memory. If a

Headlamp circuitry.

match is made the BEM will mobilise. The BEM

When the auto headlamp feature is selected and the

will then receive a challenge from the Power

ignition is in the run or accessories position,

Control module (PCM) over the CAN bus. The

diagnostics of the Auto Headlamps and twilight sensor

BEM will then respond to the PCM also over the

will occur every time auto headlamps are required to

CAN bus.

turn on. Diagnostics will also run if the headlamps are

Power Control Module (PCM): The PCM is

required to turn off.

responsible for allowing the vehicle to start, sends

a challenge to the BEM, once a valid response

Twilight Sensor Diagnostics

has been received from the BEM allows the

An error message out of range DTC will be displayed

engine to continue to run. If not, the engine will be

if the PWM frequency is above 420 Hz for the darkest

stalled.

condition or below 1 to 47Hz for the lightest condition.

Transceiver Lock assembly (TILA)

If no PWM signal is received, the error message will

read Open or Short circuit to ground and DTC will be

displayed.
The Auto Headlamp output has a failsafe mechanism

in that the relay output will be maintained should an

output driver fail. If the Twilight Sensor fails and Auto

Headlamps is selected then the BEM will default to a

failsafe strategy as follows. When the Ignition or

accessories are turned on, the headlamps will be on

and when the ignition is off the Headlamps will turn

off. Whenever an Auto headlamp output failure is

detected, a warning buzzer (from the cluster) will

sound for a limited time when the ignition is turned

from on to off and next time the ignition is turned from

off to on. The buzzer will sound on the ignition

transitions until the fault is rectified.
During a power reset and Twilight Sensor data is not

The TILA comprises a Transceiver with an ignition key

available the BEM will assume a dark condition and

light ring, steering lock and ignition starter switch that

turn the Auto headlamps on until sufficient twilight

will perform the following functions:

sensor data is available. Once the data is available if

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Body Electronics Module (BEM) 

419-10-7

DESCRIPTION AND OPERATION (Continued)

The Transceiver provides an electrical/RF interface

provide an interface between the RF remote Keys and

between the BEM and the transponder housed in the

the BEM. The receiver is a superheterodyne design

ignition key head. The transceiver generates a low

that converts the AM encoded signals from the RF

frequency field that is radiated by the integrated

remote keys into data that is validated by the BEM.

antenna, and used to transmit and receive signals

Once validated the command sent to the receiver is

from the transponder. The transceiver may be

acted upon by the BEM. Ie lock or unlock etc.

removed by loosening the retaining screw and sliding

The range of the remote keys may be reduced by the

the assembly off the lock housing. When replacing the use of aftermarket window tinting, heavy rain, snow,

transceiver it is important that the tightening torque for hail, close proximity to trees. Strong RF signals on or

the retaining screw is observed.

near the frequency of the receiver may cause

This is 19.5 Nm Max for the original screw.

de-sensitisation.

The Ignition Key light Ring illuminates as part of the The receiver obtains battery power from the BEM fuse

courtesy lamp function with illuminated entry and exit

all the time. The receiver detects any valid signals

delays.

from any remote key. If a signal is detected, the

receiver will be turned on. After the signal has been

The Steering Lock Assembly is part of the steering

received, the receiver will resume polling to await the

column and cannot be removed. The lock assembly

next transmission.

provides mechanical security by locking the steering

column by way of a locking bolt that engages once

Refer to WDS tests for fault finding. The receiver unit

the ignition key is removed from the lock and the

is a servicable item. If faulty refer to ICC section of

steering column rotated. A lock barrel is located in the service manual for procedure for removal and

lock housing and when the ignition key is inserted

replacement.

allows the ignition switch to be turned to Accessories,

Cabin Temperature Sensor (CTS)

Ignition and start positions.

The CTS is located behind the instrument fascia panel

 CAUTION: As an added security feature the

as part of the ICC. The CTS takes temperature

lock bolt will fire into the locked position and

readings via a DC operated fan motor drawing air

remain permanently locked if the lock is turned

from the car interior through the grill and across a

with the barrel removed, if this happens the whole thermistor. When there is a change in temperature,

steering column must be removed and replaced.

the value of resistance changes giving a change in

voltage output. This change is read by the BEM where

To replace the lock barrel, insert the barrel into the

it is translated into a CAN message that is read by the

lock until the pin locks into the housing.

HIM.

The Ignition Starter Switch provides electrical

contact of the battery supply to the accessories,

ignition and starter circuits. In the start position, a

lamp proofing circuit is provided with a ground. The

start position is spring loaded to return to the ignition

position. The switch mechanism cannot be removed

and is not serviceable.
The TILA wiring harness also provides an interface to

the pedal height motor assembly.

Remote Receiver Module

The CTS is not a servicable item. If the CTS is faulty

the complete ICC should be replaced as per

procedure for ICC replacement, after prior approval

gained.
WDS to be used to program and check calibration

factor loaded into BEM. This calibration factor should

be the same as the calibration factor identified on the

CTS ID label.

P & A BEM
The P & A BEM is programmed in an immobilised

The RF receiver module is mounted inside the

state. To install a new P & A BEM, DST ignition key

passenger compartment at the top of the ICC to

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