Ford Falcon. Manual — part 397

419-10-16

Body Electronics Module (BEM)

419-10-16

DIAGNOSIS AND TESTING (Continued)

Condition

Source

Action

Power windows do not time out 45

BEM related

Go to Pinpoint Test E

BEM power window supply output

Go to pinpoint test M

seconds after door opened

faulty

Check other possible causes

BEM door ajar inputs faulty

Faulty door ajar switch.
Wiring fault

BEM related

Check if key in ignition

Doors will not lock, Horn beeps

Door Ajar input faulty

Check if transponder in vicinity of

Door open

ignition

Ignition key in ignition lock.

Check cluster door ajar indicator if not

Transponder in vicinity of ignition

accurate then

Faulty Door actuator

Go to pinpoint test M

Wiring fault

Go to doors will not lock/unlock

Water ingress into connectors of door

Check other possible causes

circuits.

BEM related

Check all doors are closed

Doors will not Lock/unlock

BEM door lock driver circuit faulty

Using WDS ensure BEM is not in taxi

BEM door ajar inputs faulty

mode. PID TAXI_MODE Byte 1 Bit 7

BEM door lock status input faulty

should =0. If not then change status of

PCM mistakenly reports a crash (lock

bit.

only)

Check for DTC B1300. Action DTC’s

Remote key not trained

Go to Pinpoint Test C

Remote key battery Flat

Following test should be called up from

Poor range due to aftermarket window

DTC chart:

tint

Check door lock output status with

High local RF field.

WDS (PID D_LCKO#)

Faulty door feedback circuit

Monitor status of door lock feedback

Ignition turned on

(PID DLOCK_ST) while activating

Blown Door Fuse

locks manually.

Remote receiver fault

Go to pinpoint test M

Wiring fault

Go to Pinpoint Test F

Door lock motor fault

Check other possible causes

ICC switch fault

BEM related

Using WDS check for DTC B1300.

Door Locks Change State randomly

Door lock feedback circuit faulty

Action DTC

Door lock output faulty

Check earth connections for door

Wiring fault (Ground shift). Turning on

actuators, main battery to body earth

high current loads such as headlamps

G1.

can cause the feedback reference at

Refer to earth path, Door actuator to

pin J2/24 to move upwards.

G2 or G3

ICC faulty

Check other possible causes

No Response from Remote Keys all

BEM related:

Resynchronise keys.

Comms line with Receiver not

Replace remote key battery if required.

Buttons

working

Retrain

all

keys.

Ignition and/or Accessories not

Go to Pinpoint Test F

low at key off

Go to Pinpoint Test D

Remote key not trained.

Relocate vehicle and test remote keys.

Two remotes operating at the same
time
Remote key lost sychronisation.
Remote key battery Flat.(<3.2V)
Poor range due to aftermarket window
tint.
High local RF field
Remote Receiver not operating.

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419-10-17

Body Electronics Module (BEM)

419-10-17

DIAGNOSIS AND TESTING (Continued)

Condition

Source

Action

Boot will not open using Instrument

BEM Related:

Press decklid switch, Ignition On.

Input to BEM faulty

Monitor decklid switch status, PID

Panel Switch

BEM output faulty D

ECKLIDOS#

Vehicle speed above 8km/h.

If PID does not change state then

Vehicle Locked and Battery Saver

check J1/9 goes low when boot

Timed out

release pressed

Wiring faults

Press decklid switch, Ignition On.

Switch fault.

Monitor decklid output status, PID
D

ECKLIDOS#

Solenoid fault

If PID does not change state Activate

PID D

ECKLIDOS#

Listen for activation of solenoid. If not

OK then test J3/7 with a test light to
ground press boot release switch a
short pulse should be observed.

Test solenoid and wiring to boot

solenoid.

Check other possible causes

Battery Saver Circuit Not Functioning

Cycle ignition switch. Does battery

BEM related:

Remote key will not turn on dome

saver turn on? If not proceed as

Incorrect Personalised settings.

lamp.

follows.

Battery saver timed out.

Use PID BATSAVRLY# to turn on

Faulty Battery Saver Output

NOTE:

The following functions will not

battery saver

Blown Courtesy Fuse.

operate: Dome lamps, Glove box lamps,

Go To Pinpoint Test H.

Boot lamp, Sunload/Twilight sensor, Power

Fault in wiring

Check other possible causes

Antenna, Antenna amplifier, TILA Light
Ring.

BEM Related:

Go to Pinpoint Test I

Dome lamp not functioning

Personalized settings incorrect

Pinpoint test H

No 12 V Input at J3/6

Pinpoint test M and monitor dome

Low Side Driver Failure(J3/12)

lamp operation

Door ajar input faulty

Check other possible causes

Remote Receiver did not receive
unlock signal
Ignition On
Blown Globe

BEM Related:

Press dome lamp button on ICC, if

Dome lamp will not go out

Shorted Low Side Driver

dome lamps do not turn off then

Faulty Wiring

Test for shorts on J3/12 to dome

Can message not being received from

lamps, check wiring from BEM to Light

ICC

ring for shorts to ground.

Select PID ILLENTRLY#, and monitor

Short circuit on TILA

status while pressing dome lamp
switch. If not changing state then
check ICC and CAN wiring. If PID is
changing state then check wiring. If
wiring OK then control PID
ILLENTRLY#. IF wiring OK, CAN
comms OK and

PID will still not turn

off dome lamp then change BEM.

Check other possible causes

No Hazard Acknowledgment of

BEM Related:

Confirm other remote functions are

BEM/receiver comms not

operating correctly

Remote Key

operating

With ignition on check the CAN

BEM not sending CAN message

communication between BEM and

BEM CAN global wake up line

cluster by opening and closing a door

faulty

to check if door ajar status is correctly

Wiring fault (CAN line or Can wake up

shown on cluster. If status is not

line faulty)

correctly shown then check CAN

Faulty cluster

wiring. If status is correctly shown then
proceed

Faulty receiver

Leave car in ignition off status for more

than 2 minutes, then press remote key.
Check pin J2/21 (CAN global wake up)
goes low for 2 minutes after remote
key is pressed

Check other possible causes

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419-10-18

Body Electronics Module (BEM)

419-10-18

DIAGNOSIS AND TESTING (Continued)

Condition

Source

Action

BEM related

Monitor Washer Fluid level PID

Low Washer Fluid not detected

Faulty washer fluid level input

WFLUID Remove the lid from the

circuit

washer bottle so that the switch

CAN comms not working

closes. Did Status of PID change?

Wiring O/C

A low should be present on J1/20.

Faulty Level switch

Check earthing of switch.

Check BEM to cluster CAN comms by

Cluster fault

opening and closing a door with the
ignition on. Cluster should indicate
door ajar status

Check other possible causes.

BEM does not have Accessories input.

If 12V is not available at the BEM the

Check the 10A fuse is not blown

following functions will be affected:

Check wiring

(CCT297)

No wash function

If fuse OK and wiring OK then change

No intermittent wipe

BEM

No power windows
No rear demist
No ICC operation

Fuse blown
Wiring fault
BEM input faulty

BEM Accessories line remains high at

BEM related

Remove all non standard accessories

key off resulting in

Internal short on BEM

and see if problem persists

No remote entry

External wiring problem

If problem persists without the

No battery saver function

This fault is often due to the fitment of

accessories then check wiring. If wiring

No boot release time out

other accessories holding the

OK then change the BEM

accessories line high. Audio amplifiers

Rear demist time out not cancelled

or mobile phones can have high
supply line capacitance that keeps the
voltage high after key off

No Ignition input to BEM in ignition or

BEM related

Tila fault

start position resulting in

Ignition input on BEM faulty

Check fuse

Wiring fault

Check wiring

No Headlamp failure chime

Blown fuse

Check TILA
Using WDS check PID IGN_SW

No global can make up

correctly reflects ignition switch
position. If it does not and wiring and
fuse and TILA are OK then change
BEM.

BEM related

Check continuity between pins J1/1

No Clock illumination

Feedthrough circuit/s faulty

and J4/12

Faulty cluster

Check continuity between pins J1/2

and J4/10

Faulty wiring

If continuity checks above are not OK

then change BEM. If they are OK then
check other possible causes.

BEM related

Confirm correct procedure has been

Cannot Teach Transponder Keys

Customer Key teach mode not

used to enter transponder key teach

enabled

mode

BEM/TILA communication circuit

Using already trained key check that

faulty

key out/dome on function works. If this

Faulty TILA

does not work there is a problem with

Faulty wiring

TILA/BEM system and al possible

Faulty transponder

causes should be checked. If TILA,
wiring, and transponder are OK then

Low Battery Voltage

change BEM

Headlamps do not go on when light

BEM related

Check other possible causes

level is low (dark conditions) with

Low series BEM in a High series

Using WDS control using PID

car.

AUTOOUTST# to turn headlamps on

Ignition on and Auto Selected

Twilight level settings incorrect

and off (with headlamp switch in auto

No connection between J1/6, J2/1 and

position). If this does not work then

the headlamp switch

change BEM. If this works then

Faulty Headlamp switch

Check twilight level settings using

Low series Headlamp switch fitted in

WDS and interrogating PID

high series car

ON_THOLD & OFF_THOLD. Adjust

Faulty twilight sensor

these thresholds using block write $0F

Faulty wiring

if required

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419-10-19

Body Electronics Module (BEM)

419-10-19

DIAGNOSIS AND TESTING (Continued)

Condition

Source

Action

BEM related

Using WDS Check for $D900 DTC.

No Wipe on take off

Speed signal not received on

This, in conjunction with PID

CAN from PCM

PCM_MSG will indicate if there have

Faulty PCM

been issues with CAN comms to PCM

Faulty CAN line

Check other possible causes

BEM related

Use WDS to determine if park switch

Wipers do not Park in Off position

Wiper interface circuit on BEM

is in parked position. PID

faulty

WPRPRKSTS

Ignition turned off before wipers

Test continuity between J3/1 and J3/2,

parked

wiper off. Tests internal relay contacts.

Faulty wiper motors

Test continuity between J3/2 and 28 of

wiper switch

Faulty park switch

Test continuity between J3/1 and wiper

park switch

Inspect wiper park switch
Check

Adjustment

Wipers do not operate in intermittent

BEM related

Do all tests in Wipers do not park in

Faulty wiper interface circuitry

Off position, if ok proceed

mode

Faulty wiper dwell pot input circuit

Using WDS read wiper switch status

Wiper motor drivers not working

PID WP_STAT by selecting each

Faulty wiper motor

position with intermittent selected

Faulty wiper dwell pot

Test wiring between J1/19 and wiper

switch. Goes low when intermittent

Faulty wiring

selected

Check Wiper switch grounding
Check other possible causes

No Timed Wash Function or Wipe after

BEM related

If washer motor runs but no timed

Wash input circuit faulty

feature, check wiring between J3/10

Wash

Wiring fault

and wiper switch (CCt 941)

Check 12 V available at J2/12 and

Wiper switch fault

J1/10 with ignition on

BEM related

Check headlamp switch is in auto

No Headlamp Fail Chime

Ignition input circuit faulty

position

CAN communication to cluster

Check BEM communications to cluster

not working

by opening and closing a door when

BEM thinks its in auto mode

ignition is on and confirming the cluster

No Ignition Input to BEM

is correctly displaying door ajar status

Cluster faulty

Check other possible causes

Wiring faulty

Test 12V available at J1/10 when in

ignition position, and 0V when ignition

Headlamp switch faulty

is off

Connector Circuit Reference

BEM

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