2006 INFINITI QX56 warning

BL-2Revision: November 20092006 QX56
BCM Power Supply and Ground Circuit Check ...
... 59
Trouble Diagnoses ............................................... ... 60
SYMPTOM CHART ............................................. 60
Key Switch (Insert) Check ...................................... 62
Door Switch Check .............................................. ... 63
Keyfob Battery and Function Check .................... ... 65
Remote Keyless Entry Receiver System Check .. ... 66
ACC Power Check ............................................... ... 68
IPDM E/R Operation Check ................................. ... 68
Check Hazard Function ....................................... ... 70
Check Horn Function ........................................... ... 70
Check Headlamp Function .................................. ... 70
Check Map Lamp Illumination Function .............. ... 70
ID Code Entry Procedure .................................... ... 71
KEYFOB ID SET UP WITH CONSULT-II ......... ... 71
KEYFOB ID SET UP WITHOUT CONSULT-II .. ... 73
Keyfob Battery Replacement ............................... ... 74
VEHICLE SECURITY (THEFT WARNING) SYSTEM ... 75
Component Parts and Harness Connector Location ... 75
System Description .............................................. ... 76
DESCRIPTION ................................................. ... 76
POWER SUPPLY AND GROUND CIRCUIT .... ... 77
INITIAL CONDITION TO ACTIVATE THE SYS-
TEM .................................................................. ... 77
VEHICLE SECURITY SYSTEM ALARM OPER-
ATION ............................................................... ... 77
VEHICLE SECURITY SYSTEM DEACTIVATION ... 78
PANIC ALARM OPERATION ............................ ... 78
CAN Communication System Description ........... ... 78
Schematic ............................................................ ... 79
Wiring Diagram — VEHSEC — ........................... ... 80
.......................................................................... ... 80
.......................................................................... ... 81
.......................................................................... ... 82
.......................................................................... ... 83
.......................................................................... ... 84
Terminals and Reference Value for BCM ............. ... 85
Terminals and Reference Value for IPDM E/R ..... ... 86
CONSULT-II Function (BCM) ............................... ... 86
CONSULT-II INSPECTION PROCEDURE ....... ... 86
CONSULT-II APPLICATION ITEM .................... ... 88
Trouble Diagnosis ................................................ ... 89
WORK FLOW ................................................... ... 89
Preliminary Check ............................................... ... 90
Symptom Chart ....................................................... 91
Door Switch Check .............................................. ... 92
Hood Switch Check ............................................. ... 94
Combination Meter (Security Indicator Lamp)
Check .................................................................. ... 95
Front Door Lock Assembly LH (Key Cylinder Switch)
Check .................................................................. ... 96
Vehicle Security Horn Alarm Check ..................... ... 98
Vehicle Security Headlamp Alarm Check ............ ... 98
Door Lock/Unlock Switch Check ............................ 98
AUTOMATIC BACK DOOR SYSTEM .................... ... 99
Component Parts and Harness Connector Location ... 99
System Description .............................................. .100
OPERATION DESCRIPTION ........................... .100
Schematic ............................................................ .105Wiring Diagram — B/CLOS — .............................
.106
Terminals and Reference Value for Back Door Con-
trol Unit ................................................................. . 111
Terminals and Reference Value for BCM ............. .112
Trouble Diagnosis Procedure ............................... .113
Self-Diagnosis Procedures .................................. .113
INPUT SIGNAL CHECK MODE ........................ .113
OPERATING CHECK MODE ............................ .113
Diagnosis Chart ................................................... .114
Back Door Power Supply and Ground Circuit
Inspection ............................................................. .115
Power Liftgate Switch System Inspection ............ .116
GLASS HATCH AJAR SWITCH CHECK .......... .117
Back Door Close (Close) Switch System Inspection .118
Back Door Close (Cancel) Switch System Inspec-
tion ....................................................................... .119
Pinch Strip System Inspection ............................. .121
Back Door Warning Chime System Inspection .... .122
Half-Latch Switch System Inspection ................... .122
Open Switch System Inspection .......................... .123
Close Switch System Inspection .......................... .124
Back Door Handle Switch System Inspection ...... .125
Cinch Latch Motor System Inspection ................. .126
DOOR ..................................................................... .128
Fitting Adjustment ................................................ .128
FRONT DOOR .................................................. .128
REAR DOOR .................................................... .128
STRIKER ADJUSTMENT ................................. .128
Removal and Installation ...................................... .129
FRONT DOOR .................................................. .129
REAR DOOR .................................................... .129
BACK DOOR .................................................... .130
FRONT DOOR LOCK ............................................. .131
Component Structure ........................................... .131
Removal and Installation ...................................... .131
REMOVAL ......................................................... .131
INSTALLATION ................................................. .133
Disassembly and Assembly ................................. .133
DOOR KEY CYLINDER ASSEMBLY ................ .133
REAR DOOR LOCK ............................................... .134
Component Structure ........................................... .134
Removal and Installation ...................................... .134
REMOVAL ......................................................... .134
INSTALLATION ................................................. .134
BACK DOOR LOCK ............................................... .135
Power Back Door Opener .................................... .135
REMOVAL ........................................................ .135
INSTALLATION ................................................ .135
Door Lock Assembly ............................................ .136
REMOVAL ........................................................ .136
INSTALLATION ................................................ .136
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ..................................................................... .137
Component Parts and Harness Connector Location .137
System Description .............................................. .138
System Composition ............................................ .138
ECM Re-communicating Function ....................... .139
Wiring Diagram — NATS — ................................. .140
Terminals and Reference Value for BCM ............. .141

BL-4
PRECAUTIONS
Revision: November 20092006 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EIS004PZ
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER ”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for workEIS004Q0

After removing and installing the opening/closing parts, be sure to carry out fitting adjustments to check
their operation.

Check the lubrication level, damage, and wear of each part. If necessary, grease or replace it.

HOODBL-13
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CLEARANCE AND SURFACE HEIGHT ADJUSTMENT
1. Remove the front grille. Refer to EI-17, "FRONT GRILLE" .
2. Remove the hood lock assembly and adjust the height by rotating the bumper rubber until the hood clear- ance of hood and fender becomes 1 mm (0.04 in) lower than fitting standard dimension.
3. Temporarily tighten the hood lock, and position it by engaging it with the hood striker. Check the lock and striker for looseness, and tighten the lock mounting bolt to the specified torque.
4. Adjust the clearance and surface height of hood and fender according to the fitting standard dimension by rotating right and left bumper rubbers.
CAUTION:
Adjust right/left gap between hood and each part to the following specification.
5. Install the front grille. Refer to EI-17, "
FRONT GRILLE" .
HOOD LOCK ADJUSTMENT
1. Remove the front grille. Refer to EI-17, "FRONT GRILLE" .
2. Move the hood lock to the left or right so that striker center is vertically aligned with hood lock center (when viewed from vehicle front).
3. Make sure the secondary latch is properly engaged with the sec- ondary striker with hood's own weight by dropping it from
approx. 200 mm (7.87 in) height or by pressing it lightly approx.
3 kg (29 N, 7lb).
CAUTION:
Do not drop the hood from 300 mm (11.81 in) height or
higher.
4. After adjusting hood lock, tighten the lock bolts.
5. Install the front grille. Refer to EI-17, "
FRONT GRILLE" .
Removal and Installation of Hood AssemblyEIS004Q8
1. Support the hood striker with proper material to prevent it from
falling.
WARNING:
Body injury may occur if no supporting rod is holding the
hood open when removing the damper stay.
2. Remove the hinge nuts from the hood to remove the hood assembly.
CAUTION:
Operate with two workers, because of its heavy weight.
Installation is in the reverse order of removal. Hood and headlamp (B–B) : Less than 2.0 mm
PIIA3806E
LIIA1443E

BL-46
REMOTE KEYLESS ENTRY SYSTEM
Revision: November 20092006 QX56
OPERATING PROCEDURE

When the keyfob is operated, the signal from the keyfob is sent and the remote keyless entry receiver
receives the signal and sends it to the BCM. The BCM only locks/unlocks the doors if the ID number
matches. (Remote control entry functions)

Using the keyfob, the transmitter sends radio waves to the remote keyless entry receiver, which then
sends the received waves to the BCM. Only if the ID number matches does the BCM lock/unlock the
doors. (Remote control door function)

Unless the key is inserted into the ignition key cylinder or one of the doors is opened within 1 minute after
the UNLOCK switch on the keyfob is pressed, all the doors are automatically locked. (Auto lock function)

When a door is locked or unlocked, the vehicle turn signal lamps flash and the horn sounds to verify oper-
ation. (Active check function)

When the key is in the ignition key cylinder (when the key switch is ON) and one of the doors is open, the
door lock function does not work even when the door lock is operated with the keyfob.

Keyfob ID set up is available.

If a keyfob is lost, a new keyfob can be set up. A maximum of 5 IDs can be set up simultaneously.
Remote Control Entry Functions
Operation Description

When a button on the keyfob is operated, the signal is sent from the keyfob and received by the remote
keyless entry receiver.

The received signal is sent to the BCM and compared with the registered ID number.

If the ID number matches, the BCM sends the lock/unlock signal to each door lock actuator.

When the door lock actuators receive this signal, each operates to lock/unlock its door.

BCM locks all doors with input of LOCK signal from keyfob.

When an UNLOCK signal is sent from keyfob once, driver's door will be unlocked.

Then, if an UNLOCK signal is sent from keyfob again within 5 seconds, all other doors will be unlocked.
Remote control entry operation conditions
Auto Lock Function
Operation Description

Unless the key is inserted into the ignition key cylinder, one of the doors is opened, or the keyfob is oper-
ated within 1 minute after a door lock is unlocked by keyfob operation, all the doors are automatically
locked.
The 1 minute timer count is executed by the BCM and after 1 minute, the BCM sends the lock signal to all
doors.
Lock operations are the same as for the remote control entry function.
Remote Control Automatic Back Door Function
Switching from all closed to all open

When a button on the keyfob is operated, the signal is sent from the keyfob and received by the remote
keyless entry receiver.

The received signal is sent to the BCM and compared with the registered ID number.

If the ID number matches, the BCM uses power window serial link communication to send the back door
open signal to the back door control unit

When the back door control unit receives the back door open signal for 0.5 seconds, if the remote control
automatic back door operation enable conditions are met, the warning chime is sounded and the back
door unlock signal is sent to the back door latch using communication.

When the back door latch receives the back door unlock signal, it operates the release actuator and
releases to back door latch.
Keyfob operation Operation condition
Door lock operation (locking)

With key removed (key switch: OFF)

Closing all doors (door switch: OFF)
Door lock operation (unlocking) With key removed (key switch: OFF)

REMOTE KEYLESS ENTRY SYSTEMBL-47
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Revision: November 2009 2006 QX56

The back door control unit operates the back door motor to open the back door. (At this time, speed con-
trol, input reverse, and overload reverse control are executed.)

When the back door is opened to the fully open position, the full-open position is detected with the rotation
sensor, the back door motor is stopped.

The door held by the back door stays at the full open position.
Full open → full closed operation

When a button of the keyfob is operated, the signal is sent from the keyfob and received by the remote
keyless entry receiver.

The received signal is sent to the BCM and compared with the registered ID number.

If the ID number matches, the BCM uses power window serial link communication to send the back door
close request signal to the back door control unit.

When the back door control unit receives the back door close request signal for 0.5 seconds, if the remote
control automatic back door operation enable conditions are met, the warning chime is sounded and the
back door motor begins closing the back door.

The back door control unit operates the magnetic clutch and the back door motor to close the back door.
(At this time, the back door control unit executes speed control, input reverse, and overload reverse con-
trol.)

When the back door comes to the half-latch state, the back door latch detects the half-latch state through
half-latch switch operation. The back door latch latches the back door.
For the automatic back door system operation enable conditions, refer to BL-99, "
AUTOMATIC BACK DOOR
SYSTEM" .
Active Check Function
Operation Description
When a door is locked or unlocked by keyfob operation, the vehicle turn signals flash and the horn sounds to
verify operation.

When a button on the keyfob is operated, the signal is sent from the remote controller and received by the
keyless remote entry receiver.

The received signal is sent to the BCM and compared with the registered ID number.

If the ID number matches, the BCM sends the turn signal flashing and horn signal to the IPDM E/R.

The IPDM E/R flashes the turn signal lamps and sounds the horn for each keyfob operation.
Operating function of hazard and horn reminder
Hazard and Horn Reminder
BCM output to IPDM E/R for horn reminder signal as DATA LINE (CAN-H and CAN-L).
The hazard and horn reminder has C mode (horn chirp mode) and S mode (non-horn chirp mode).
How to change hazard and horn reminder mode With CONSULT-II
Hazard and horn reminder can be changed using “WORK SUPPORT” mode in “MULTI ANSWER BACK SET".
Without CONSULT-II
Refer to Owner's Manual for instructions.
Interior Lamp Operation
When the following input signals are both supplied:

all door switches are in the OFF position. (when all the doors are closed);

interior lamp switch is in DOOR position.
Remote keyless entry system turns on interior lamp and ignition keyhole illumination (for 30 seconds) with
input of UNLOCK signal from keyfob.
For detailed description, refer to LT- 1 3 6 , "
ROOM LAMP TIMER OPERATION" .
C mode S mode
Keyfob operation LockUnlock LockUnlock
Hazard warning lamp
flash Twice
OnceTwice —
Horn sound Once———

BL-58
REMOTE KEYLESS ENTRY SYSTEM
Revision: November 20092006 QX56
Hazard and horn reminder mode
Auto locking function mode
Panic alarm operation mode
Back door open operation mode
Keyless power window down operation mode
MODE 1
(C mode) MODE 2
(S mode) MODE 3 MODE 4 MODE 5 MODE 6
Keyfob
operation Lock Unlock Lock Unlock Lock Unlock Lock Unlock Lock Unlock Lock Unlock
Hazard warning
lamp flash Twice Onc e Twice
———Twice Once Twice ——Once
Horn sound Once ——————— Once—Once —
MODE 1 MODE 2 MODE 3
Auto locking function 5 minutesNothing1 minute
MODE 1 MODE 2 MODE 3
Keyfob operation 0.5 secondsNothing1.5 seconds
MODE 1 MODE 2 MODE 3
Keyfob operation 0.5 secondsNothing0.5 seconds
MODE 1 MODE 2 MODE 3
Keyfob operation 3 secondsNothing5 seconds

BL-70
REMOTE KEYLESS ENTRY SYSTEM
Revision: November 20092006 QX56
Check Hazard FunctionEIS00608
1. CHECK HAZARD WARNING LAMP
Does hazard indicator flash with hazard switch?
Ye s o r N o
Yes >> Hazard warning lamp circuit is OK.
No >> Check hazard indicator. Refer to LT- 8 0 , "
TURN SIGNAL AND HAZARD WARNING LAMPS" .
Check Horn FunctionEIS00609
First, perform the "SELF-DIAG RESULTS" in "BCM" with CONSULT-II, then perform the trouble diagnosis of
malfunction system indicated in "SELF-DIAG RESULTS" of "BCM".
1. CHECK HORN FUNCTION
Does horn sound with horn switch?
Ye s o r N o
Yes >> Horn circuit is OK.
No >> Check horn circuit. Refer to WW-55, "
HORN" .
Check Headlamp FunctionEIS0060A
First, perform the "SELF-DIAG RESULTS" in "BCM" with CONSULT-II, then perform the trouble diagnosis of
malfunction system indicated in "SELF-DIAG RESULTS" of "BCM".
1. CHECK HEADLAMP OPERATION
Does headlamp come on when turning lighting switch ON?
Ye s o r N o
Yes >> Headlamp operation circuit is OK.
No >> Check headlamp circuit. Refer to LT- 5 , "
HEADLAMP (FOR USA)" .
Check Map Lamp Illumination FunctionEIS0060B
1. CHECK MAP LAMP ILLUMINATION FUNCTION
When map lamp switch is in DOOR position, open the front door LH or RH.
OK or NG
OK >> System is OK.
NG >> Check map lamp illumination circuit. Refer to LT- 1 5 7 , "
ILLUMINATION" .
Map lamp and ignition keyhole illumination should illuminate.

VEHICLE SECURITY (THEFT WARNING) SYSTEMBL-75
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VEHICLE SECURITY (THEFT WARNING) SYSTEMPFP:28491
Component Parts and Harness Connector LocationEIS0060E
LIIA2374E
1. Fuse block (J/B)2. Fuse and fusible link box3. IPDM E/R fuse layout
4. IPDM E/R E122, E123, E124 5. Steering column
(view with instrument panel LH
removed) 6. Data link connector M22
(view with instrument panel LH
removed)