ignition INFINITI QX56 2007 Factory Service Manual

BCS-12
< SERVICE INFORMATION >
BCM (BODY CONTROL MODULE)
18 PRemote keyless entry
receiver and optical
sensor (ground)Output OFF — 0V
19 V/WRemote keyless entry
receiver (power sup-
ply)Output OFF Ignition switch OFF
20 G/WRemote keyless entry
receiver signal (Sig-
nal)Input OFFStand-by (keyfob buttons re-
leased)
When remote keyless entry
receiver receives signal from
keyfob (keyfob buttons
pressed)
21 G NATS antenna amp. InputOFF →
ONIgnition switch (OFF → ON)Just after turning ignition switch
ON: Pointer of tester should
move for approx. 1 second, then
return to battery voltage.
22 W/V BUS — —Ignition switch ON or power
window timer operates
23 G/OSecurity indicator
lampOutput OFFGoes OFF → illuminates (Ev-
ery 2.4 seconds)Battery voltage → 0V
25 BR NATS antenna amp. InputOFF →
ONIgnition switch (OFF → ON)Just after turning ignition switch
ON: Pointer of tester should
move for approx. 1 second, then
return to battery voltage.
26 Y/LRear wiper auto stop
switch 2Input ONRise up position (rear wiper
arm on stopper)0V
A Position (full clockwise stop
position)0V
Forward sweep (counterclock-
wise direction)Fluctuating
B Position (full counterclock-
wise stop position)Battery voltage
Reverse sweep (clockwise di-
rection)Fluctuating Te r m i n a lWire
colorSignal nameSignal
input/
outputMeasuring condition
Reference value or waveform
(Approx.) Ignition
switchOperation or condition
LIIA1893E
LIIA1894E
LIIA1895E
PIIA2344E

BCM (BODY CONTROL MODULE)
BCS-13
< SERVICE INFORMATION >
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27 W/RCompressor ON sig-
nalInput ONA/C switch OFF 5V
A/C switch ON 0V
28 L/R Front blower monitor Input ONFront blower motor OFF Battery voltage
Front blower motor ON 0V
29 W/B Hazard switch Input OFFON 0V
OFF 5V
30 Y/BR Glass hatch switch Input OFFGlass hatch switch released
→ Glass hatch switch pressedBattery voltage → 0V
32 R/GCombination switch
output 5Output ONLighting, turn, wiper OFF
Wiper dial position 4
33 R/YCombination switch
output 4Output ONLighting, turn, wiper OFF
Wiper dial position 4
34 LCombination switch
output 3Output ONLighting, turn, wiper OFF
Wiper dial position 4
35 O/BCombination switch
output 2
Output ONLighting, turn, wiper OFF
Wiper dial position 4
36 R/WCombination switch
output 1
37 B/RKey switch and key
lock solenoidInput OFFKey inserted Battery voltage
Key removed 0V
38 W/L Ignition switch (ON) Input ON — Battery voltage
39 L CAN-H — — — —
40 P CAN-L — — — —
42 GRGlass hatch ajar
switchInput ONGlass hatch open 0
Glass hatch closed Battery
43 R/BBack door latch (door
ajar switch)Input OFFON (open) 0V
OFF (closed) Battery voltage Te r m i n a lWire
colorSignal nameSignal
input/
outputMeasuring condition
Reference value or waveform
(Approx.) Ignition
switchOperation or condition
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E

BCS-14
< SERVICE INFORMATION >
BCM (BODY CONTROL MODULE)
44 ORear wiper auto stop
switch 1Input ONRise up position (rear wiper
arm on stopper)0V
A Position (full clockwise stop
position)Battery voltage
Forward sweep (counterclock-
wise direction)Fluctuating
B Position (full counterclock-
wise stop position)0V
Reverse sweep (clockwise di-
rection)Fluctuating
47 SB Front door switch LH Input OFFON (open) 0V
OFF (closed) Battery voltage
48 R/Y Rear door switch LH Input OFFON (open) 0V
OFF (closed) Battery voltage
49 R Cargo lamp Output OFFAny door open (ON) 0V
All doors closed (OFF) Battery voltage
51 Y/BTrailer turn signal
(right)Output ON Turn right ON
52 G/B Trailer turn signal (left) Output ON Turn left ON
53 L/WGlass hatch lock actu-
atorInput OFFGlass hatch switch released
→ Glass hatch switch pressed0V → Battery voltage for 300
msec.
54 YRear wiper output cir-
cuit 2Input ONRise up position (rear wiper
arm on stopper)0V
A Position (full clockwise stop
position)0V
Forward sweep (counterclock-
wise direction)0V
B Position (full counterclock-
wise stop position)Battery voltage
Reverse sweep (clockwise di-
rection)Battery voltage
55 SBRear wiper output cir-
cuit 1Output ONOFF 0
ON Battery voltage
56 R/G Battery saver output OutputOFF30 minutes after ignition
switch is turned OFF0V
ON — Battery voltage
57 Y/R Battery power supply Input OFF — Battery voltage Te r m i n a lWire
colorSignal nameSignal
input/
outputMeasuring condition
Reference value or waveform
(Approx.) Ignition
switchOperation or condition
SKIA3009J
SKIA3009J

BCM (BODY CONTROL MODULE)
BCS-15
< SERVICE INFORMATION >
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BCM Power Supply and Ground Circuit InspectionINFOID:0000000003533601
1.CHECK FUSES AND FUSIBLE LINK
• Check 50A fusible link (letter f, located in the fuse and fusible link box).
• Check 10A fuse [No. 4, located in the fuse block (J/B)] and 15A fuse [No. 22, located in the fuse block (J/B)].
58 W/R Optical sensor Input ONWhen optical sensor is illumi-
nated3.1V or more
When optical sensor is not illu-
minated0.6V or less
59 GFront door lock as-
sembly LH actuator
(unlock)Output OFFOFF (neutral) 0V
ON (unlock) Battery voltage
60 G/B Turn signal LH Output ON Turn left ON
61 G/Y Turn signal RH Output ON Turn right ON
62 R/W Step lamp LH and RH Output OFFON (any door open) 0V
OFF (all doors closed) Battery voltage
63 LInterior room/map
lampOutput OFFAny door
switchON (open) 0V
OFF (closed) Battery voltage
65 VAll door lock actuators
(lock)Output OFFOFF (neutral) 0V
ON (lock) Battery voltage
66 G/YFront door lock actua-
tor RH, rear door lock
actuators LH/RH and
back door lock actua-
tor (unlock)Output OFFOFF (neutral) 0V
ON (unlock) Battery voltage
67 B Ground Input ON — 0V
68 W/LPower window power
supply (RAP)Output —Ignition switch ON Battery voltage
Within 45 seconds after igni-
tion switch OFFBattery voltage
More than 45 seconds after ig-
nition switch OFF0V
When front door LH or RH is
open or power window timer
operates0V
69 W/RPower window power
supplyOutput — — Battery voltage
70 W/B Battery power supply Input OFF — Battery voltage Te r m i n a lWire
colorSignal nameSignal
input/
outputMeasuring condition
Reference value or waveform
(Approx.) Ignition
switchOperation or condition
SKIA3009J
SKIA3009J

BCS-16
< SERVICE INFORMATION >
BCM (BODY CONTROL MODULE)
• Check 10A fuse (No. 59, located in the fuse and relay box).
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK BCM POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM connectors and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace the harness.
3.CHECK GROUND CIRCUIT
Check continuity between BCM connector M20 terminal 67 and
ground.
OK or NG
OK >> Power supply and ground circuit is OK.
NG >> Repair or replace harness.
CONSULT-II Function (BCM)INFOID:0000000003533602
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
ConnectorTe r m i n a l s
Power
sourceConditionVoltage (V) (Ap-
prox.)
(+) (-)
M1811 GroundACC
power
supplyIgnition
switch
ACC or
ONBattery voltage
38 GroundIgnition
power
supplyIgnition
switch ON
or STARTBattery voltage
M2057 GroundBattery
power
supplyIgnition
switch
OFFBattery voltage
70 GroundBattery
power
supplyIgnition
switch
OFFBattery voltage
LIIA2415E
67 - Ground : Continuity should exist.
LIIA0915E

BCS-18
< SERVICE INFORMATION >
BCM (BODY CONTROL MODULE)
Display Item List
CAN Communication Inspection Using CONSULT-II (Self-Diagnosis)INFOID:0000000003533603
1.SELF-DIAGNOSTIC RESULT CHECK
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
1. Connect to CONSULT–II, and select “BCM” on “SELECT SYSTEM” screen.
2. Select “BCM” on “SELECT TEST ITEM” screen, and select “SELF-DIAG RESULTS”.
3. Check display content in self-diagnostic results.
Contents displayed
No malfunction>>Inspection End.
Malfunction in CAN communication system>>After printing the monitor items, go to LAN-7
.
ConfigurationINFOID:0000000003533604
DESCRIPTION
CONFIGURATION has two functions as follows:
• READ CONFIGURATION is the function to confirm vehicle configuration of current BCM.
• WRITE CONFIGURATION is the function to write vehicle configuration on BCM.
CAUTION:
• When replacing BCM, you must perform WRITE CONFIGURATION with CONSULT-II.
• Complete the procedure of WRITE CONFIGURATION in order.
• If you set incorrect WRITE CONFIGURATION, incidents will occur.
• Configuration is different for each vehicle model. Confirm configuration of each vehicle model.
READ CONFIGURATION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. With ignition switch OFF, connect CONSULT-II and CONSULT-II
CONVERTER to data link connector and turn ignition switch ON.
Item Description
RESET SETTING VALUE Return a value set with WORK SUPPORT of each system to a default value in factory shipment.
CONSULT-II display code Diagnosis item
U1000INITIAL DIAG
TRANSMIT DIAG
ECM
IPDM E/R
METER/M&A
I-KEY
PAIA0070E

BCM (BODY CONTROL MODULE)
BCS-21
< SERVICE INFORMATION >
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WRITE CONFIGURATION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. With ignition switch OFF, connect CONSULT-II and CONSULT-II
CONVERTER to data link connector and turn ignition switch ON.
2. Touch “START (NISSAN BASED VHCL)”.
3. Touch “BCM” on “SELECT SYSTEM” screen.
If "BCM" is not indicated, go to GI-38, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
4. Touch “BCM” on “SELECT TEST ITEM” screen.
PAIA0070E
BCIA0029E
BCIA0030E
LKIA0183E

BCS-24
< SERVICE INFORMATION >
BCM (BODY CONTROL MODULE)
14. Touch "OK" on "WRITE CONFIGURATION" screen.
WRITE CONFIGURATION is completed.
BCMINFOID:0000000003533605
REMOVAL AND INSTALLATION
NOTE:
If possible, before removing BCM, retrieve current BCM configuration to use for reference when configuring
brand-new BCM after installation. Refer to BCS-18, "
Configuration".
Removal
1. Disconnect battery negative terminal.
2. Remove instrument lower panel LH. Refer to IP-10
.
3. Remove knee protector. IP-10
.
4. Disconnect BCM electrical connectors.
5. Remove BCM screws and remove BCM.
Installation
Installation is in the reverse order of removal.
NOTE:
• When replacing BCM, it must be configured. Refer to BCS-18, "
Configuration".
• When replacing BCM, perform initialization of NATS system and registration of all NATS ignition key IDs.
Refer to BL-116
.
• When replacing BCM, perform ID registration procedure of low tire pressure warning system. Refer to WT-
12, "ID Registration Procedure".
LKIA0400E
LEIA0068E

BL-16
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
• to BCM terminal 70
• through 15A fuse [No. 22, located in the fuse block (J/B)]
• to BCM terminal 57
• through 10A fuse [No. 19, located in the fuse block (J/B)]
• to key switch and key lock solenoid terminal 3.
With ignition key inserted, power is supplied
• through key switch and key lock solenoid terminal 4
• to BCM terminal 37.
Ground is supplied to terminal 67 of BCM through body grounds M57, M61 and M79.
When the door is locked or unlocked with main power window and door lock/unlock switch, ground is supplied
• to CPU of main power window and door lock/unlock switch
• through main power window and door lock/unlock switch terminal 17
• through grounds M57, M61 and M79.
Then main power window and door lock/unlock switch operation signal is supplied
• to BCM terminal 22
• through main power window and door lock/unlock switch terminal 14.
When the door is locked or unlocked with power window and door lock/unlock switch RH, ground is supplied
• to CPU of power window and door lock/unlock switch RH
• through power window and door lock/unlock switch RH terminal 11
• through grounds M57, M61 and M79.
Then power window and door lock/unlock switch RH operation signal is supplied
• to BCM terminal 22
• through power window and door lock/unlock switch RH terminal 16.
When the door is locked with front door lock assembly LH (key cylinder switch), ground is supplied
• to main power window and door lock/unlock switch terminal 4
• through front door lock assembly LH (key cylinder switch) terminals 1 and 5
• through grounds M57, M61 and M79.
Then front door lock assembly LH (key cylinder switch) operation signal is supplied
• to BCM terminal 22
• through main power window and door lock/unlock switch terminal 14.
When the door is unlocked with front door lock assembly LH (key cylinder switch), ground is supplied
• to main power window and door lock/unlock switch terminal 6
• through front door lock assembly LH (key cylinder switch) terminals 6 and 5
• through grounds M57, M61 and M79.
Then front door lock assembly LH (key cylinder switch) operation signal is supplied
• to BCM terminal 22
• through main power window and door lock/unlock switch terminal 14.
BCM is connected to main power window and door lock/unlock switch and power window and door lock/unlock
switch RH through a bus.
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.
OUTLINE

POWER DOOR LOCK SYSTEM
BL-17
< SERVICE INFORMATION >
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NOTE:
The glass hatch switch will be operational only when the front door lock actuator RH is in the unlock position.
Functions available by operating the door lock and unlock switches on driver door and passenger door
• Interlocked with the locking operation of door lock and unlock switch, door lock actuators of all doors and
glass hatch actuator are locked.
• Interlocked with the unlocking operation of door lock and unlock switch, door lock actuators of all doors and
glass hatch actuator are unlocked.
Functions available by operating the front door lock assembly LH (key cylinder switch)
• Interlocked with the locking operation of door key cylinder, door lock actuators of all doors are locked.
• When door key cylinder is unlocked, front door lock assembly LH (actuator) is unlocked.
• When door key cylinder is unlocked for the second time within 5 seconds after the first operation, door lock
actuators on all doors are unlocked.
Key reminder door system
When door lock and unlock switch is operated to lock doors with ignition key in key cylinder and any door
open, all door lock actuators are locked and then unlocked.