2004 INFINITI QX56 horn

VEHICLE SECURITY (THEFT WARNING) SYSTEM
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Revision: August 20072004 QX56

to combination meter (security indicator lamp) terminal 8.

through 50A fusible link (letter f , located in the fuse and fusible link box)

to BCM terminal 70.

through 15A fuse [No. 22, located in the fuse block (J/B)]

to BCM terminal 57.

through 15A fuse (No. 25, located in the fuse and fusible link box)

to horn relay terminal 2.

through 20A fuse (No. 52, located in the IPDM E/R) and

through 20A fuse (No. 53, located in the IPDM E/R),

to IPDM E/R internal CPU.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 4, located in the fuse block (J/B)]

to BCM terminal 11.
Ground is supplied

to BCM terminal 67

through body grounds M57, M61 and M79 and

to IPDM E/R terminals 38 and 59

through body ground E9, E15 and E24.
INITIAL CONDITION TO ACTIVATE THE SYSTEM
The operation of the vehicle security system is controlled by the doors, hood and glass hatch.
To activate the vehicle security system, BCM must receive signals indicating the doors, hood and glass hatch
are closed and the doors are locked.
When a door or glass hatch is open, BCM terminal 12, 13, 42, 43, 47 or 48 receives a ground signal from that
switch. When the hood is open, IPDM E/R terminal 41 receives a ground signal from the hood switch.
When the front door switch LH is ON (door is open), ground is supplied

to BCM terminal 47

through front door switch LH terminal 2

through front door switch LH case ground.
When the front door switch RH is ON (door is open), ground is supplied

to BCM terminal 12

through front door switch RH terminal 2

through front door switch RH case ground.
When the rear door switch LH is ON (door is open), ground is supplied

to BCM terminal 48

through rear door switch LH terminal 2

through rear door switch LH case ground.
When the rear door switch RH is ON (door is open), ground is supplied

to BCM terminal 13

through rear door switch RH terminal 2

through rear door switch RH case ground.
When the back door latch (door ajar switch) is ON (door is open), ground is supplied

to BCM terminal 43

through back door latch (door ajar switch) terminal 7

through back door latch (door ajar switch) terminal 8

through grounds B7 and B19.
When the glass hatch ajar switch is ON (hatch is open) ground is supplied

to BCM terminal 42

through glass hatch ajar switch terminal +

through glass hatch ajar switch case ground.

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VEHICLE SECURITY (THEFT WARNING) SYSTEM
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When the hood switch is ON (hood is open) ground is supplied

to IPDM E/R terminal 41

through hood switch terminal 2

through hood switch terminal 1

through grounds E9, E15 and E24.
VEHICLE SECURITY SYSTEM ALARM OPERATION
The vehicle security system is triggered by

opening a door

opening the hood

opening the glass hatch

unlocking door without using the key or keyfob.
The vehicle security system will be triggered once the system is in armed phase,

when BCM receives a ground signal at terminals 12, 13, 47, 48 (door switch), terminal 42 (glass hatch ajar
switch) or terminal 43 [back door latch (door ajar switch)], or IPDM E/R terminal 41 (hood switch) receives
a ground signal.
Power is supplied at all times

to horn relay terminal 2

through 15A fuse (No. 25, located in fuse and fusible link box).
When the vehicle security system is triggered, ground is supplied intermittently

from IPDM E/R terminal 45

to headlamp high relay and

to horn relay terminal 1.
The headlamps flash and the horn sounds intermittently.
The alarm automatically turns off after 50 seconds, but will reactivate if the vehicle is tampered with again.
VEHICLE SECURITY SYSTEM DEACTIVATION
To deactivate the vehicle security system, a door must be unlocked with the key or keyfob.
When the key is used to unlock the front door LH, BCM terminal 22 receives signal

from terminal 14 of the main power window and door lock/unlock switch.
When the BCM receives this signal or unlock signal from keyfob, the vehicle security system is deactivated.
(Disarmed phase)
PANIC ALARM OPERATION
Remote keyless entry system may or may not operate vehicle security system (horn and headlamps) as
required.
When the remote keyless entry system is triggered, ground is supplied intermittently

from IPDM E/R terminal 45

to headlamp high relay and

to horn relay terminal 1.
The headlamp flashes and the horn sounds intermittently.
The alarm automatically turns off after 25 seconds or when BCM receives any signal from keyfob.
CAN Communication System DescriptionEIS002SF
Refer to LAN-5, "CAN COMMUNICATION" .

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VEHICLE SECURITY (THEFT WARNING) SYSTEM
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Terminals and Reference Value for IPDM E/REIS002SJ
*1: when horn reminder is ON.
*2: L/W is for USA.
*3: Y is for Canada.
CONSULT-II Function (BCM)EIS002SK
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
Terminal Wire
ColorItem ConditionVoltage (V)
(Approx.)
38 B Ground — 0
39 W CAN-H — —
40 R CAN-L — —
41 Y/B Hood switchHood closed OFF Battery voltage
Hood open ON 0V
45 G/W Horn relayWhen doors locks are operated
using keyfob (OFF → ON) *1Battery voltage → 0V
52 L Headlamp low (LH)Ignition
SW ONLighting
switch
2ND posi-
tionOFF 0V
ON Battery voltage
54 R/Y Headlamp low (RH)Ignition
SW ONLighting
switch
2ND posi-
tionOFF 0V
ON Battery voltage
55 G Headlamp high (LH)Ignition
SW ONLighting
switch
HIGH or
PA S S
positionOFF 0V
ON Battery voltage
56L/W *2
Y *3Headlamp high (RH)Ignition
SW ONLighting
switch
HIGH or
PA S S
positionOFF 0V
ON Battery voltage
59 B Ground — 0
BCM
diagnostic test itemDiagnostic mode Description
Inspection by partWORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the
BCM for setting the status suitable for required operation, input/output sig-
nals are received from the BCM and received date is displayed.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TESTOperation of electrical loads can be checked by sending drive signal to
them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTRThe result of transmit/receive diagnosis of CAN communication can be
read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.

VEHICLE SECURITY (THEFT WARNING) SYSTEM
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CONSULT-II APPLICATION ITEM
Data Monitor
Active Test
Work Support
Monitored Item Description
DOOR SW-AS Indicates [ON/OFF] condition of front door switch RH.
DOOR SW-RR Indicates [ON/OFF] condition of rear door switch RH.
DOOR SW-RL Indicates [ON/OFF] condition of rear door switch LH.
DOOR SW-DR Indicates [ON/OFF] condition of front door switch LH.
BACK DOOR SW Indicates [ON/OFF] condition of back door latch.
TRNK OPEN MNTR Indicates [ON/OFF] condition of glass hatch ajar switch.
ACC ON SW Indicates [ON/OFF] condition of ignition switch in ACC position.
IGN ON SW Indicates [ON/OFF] condition of ignition switch in ON position.
KEYLESS UNLOCK Indicates [ON/OFF] condition of unlock signal from keyfob.
KEYLESS LOCK Indicates [ON/OFF] condition of lock signal from keyfob.
KEY CYL LK-SW Indicates [ON/OFF] condition of lock signal from door key cylinder switch.
KEY CYL UN-SW Indicates [ON/OFF] condition of unlock signal from door key cylinder switch.
KEYLESS PBD Indicates [ON/OFF] condition of unlock signal from door key cylinder switch.
CDL UNLOCK SW Indicates [ON/OFF] condition of unlock signal from lock/unlock switch.
CDL LOCK SW Indicates [ON/OFF] condition of lock signal from lock/unlock switch.
HOOD SW Indicates [ON/OFF] condition of hood switch.
Test Item Description
THEFT INDThis test is able to check security indicator lamp operation. The lamp will be turned on when “ON”
on CONSULT-II screen is touched.
HEADLAMP (HI)This test is able to check vehicle security lamp operation. The highbeam headlamps will be acti-
vated for 0.5 seconds after “ON” on CONSULT-II screen is touched.
VEHICLE SECURITY HORNThis test is able to check vehicle security horn operation. The horns will be activated for 0.5 sec-
onds after “ON” on CONSULT-II screen is touched.
Test Item Description
SECURITY ALARM SET This mode can confirm and change security alarm ON-OFF setting.
THEFT ALM TRGThe switch which triggered vehicle security alarm is recorded. This mode is able to confirm and
erase the record of vehicle security alarm. The trigger data can be erased by touching “CLEAR”
on CONSULT-II screen.

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Symptom ChartEIS002SN
*1: Make sure the system is in the armed phase.PROCEDURE
Diagnostic procedure
SYMPTOM
1Vehicle security
system cannot be
set by ····Door switch Refer to BL-93, "
Door Switch Check" .
Lock/unlock switch Refer to BL-100, "
Door Lock/Unlock Switch Check" .
Door outside keyRefer to BL-98, "
Front Door Lock Assembly LH (Key Cylinder Switch)
Check" .
BCM If the above systems are “OK”, replace BCM.
Security indicator does not turn “ON”.Refer to BL-97, "
Combination Meter (Security Indicator Lamp) Check" .
If the above systems are “OK”, replace BCM.
2*1 Vehicle secu-
rity system does
not alarm when
····Any door, hood or glass hatch
is opened.Refer to BL-93, "
Door Switch Check" .
Refer to BL-95, "
Hood Switch Check" .
If the above systems are “OK”, replace BCM.
3Vehicle security
alarm does not
activate.Horn alarmRefer to BL-100, "
Vehicle Security Horn Alarm Check" .
If the above systems are “OK”, check horn system.
Refer to WW-56, "
HORN" .
Headlamp alarmRefer to BL-100, "
Vehicle Security Headlamp Alarm Check" .
If the above systems are “OK”, replace BCM.
4Vehicle security
system cannot be
canceled by ····Door outside keyRefer to BL-98, "
Front Door Lock Assembly LH (Key Cylinder Switch)
Check" .
If the above systems are “OK”, check main power window and door lock/
unlock switch.
KeyfobCheck remote keyless entry function. Refer toBL-65, "
Keyfob Battery and
Function Check"
If the above systems are “OK”, replace BCM.

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VEHICLE SECURITY (THEFT WARNING) SYSTEM
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Vehicle Security Horn Alarm CheckEIS002SR
1. CHECK HORN OPERATION
Check if horn sounds with horn switch.
Does horn operate?
Yes >> Check harness for open or short between IPDM E/R and horn relay.
No >> Check horn circuit. Refer to WW-56, "
HORN" .
Vehicle Security Headlamp Alarm Check EIS002SS
1. CHECK VEHICLE SECURITY HEADLAMP ALARM OPERATION
Check if headlamps operate with lighting switch.
Do headlamps come on when turning switch ON?
Yes >> Headlamp alarm is OK.
No >> Check headlamp system. Refer to LT- 6 , "
HEADLAMP (FOR USA)" or LT-34, "HEADLAMP (FOR
CANADA) - DAYTIME LIGHT SYSTEM -" .
Door Lock/Unlock Switch Check EIS002ST
1. CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL
Check if power door lock operates with door lock/unlock switch.
Do doors lock/unlock when using each door lock/unlock switch?
Yes >> Door lock/unlock switch is OK.
No >> Refer to BL-34, "
Door Lock/Unlock Switch Check" .

BODY REPAIR
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CRUSH HORN

Work after 1st crossmember has been removed.
Portions to be welded:
A. Inner side rail crush horn, inner side rail crush horn and outer side rail crush horn.
B. Outer side rail crush horn, outer side rail crush horn and inner side rail crush horn.
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BODY REPAIR
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Removal Notes

Scribe a straight line on the outer side rail crush horn and inner side rail crush horn along the hole center
as shown in the figure.

Cut off outer side rail crush horn and inner side rail crush horn along scribed line A. Do not cut on the hole.

Cut inner side rail crush horn at 45 mm backward cut position of cut line A. (along line B)
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