2006 INFINITI QX56 window
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POWER DOOR LOCK SYSTEMBL-17
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Revision: November 2009 2006 QX56
System DescriptionEIS005Z8
Power is supplied at all times
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 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
Page 806 of 3383
POWER DOOR LOCK SYSTEMBL-25
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Revision: November 2009 2006 QX56
Terminals and Reference Value for BCMEIS005ZB
Work FlowEIS005ZC
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to BL-17, "
System Description" .
3. According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to BL-29,
"Trouble Diagnoses Symptom Chart" .
4. Does power door lock system operate normally? OK: GO TO 5, NG: GO TO 3.
5. Inspection End.
Te r m i n a l Wire
Color Item
Condition Voltage (V)
(Approx.)
12 R/L Front door switch RH Door open (ON) → Door close (OFF) 0 → Battery voltage
13 GR Rear door switch RH Door open (ON) → Door close (OFF) 0 → Battery voltage
22 W/V Bus When ignition switch is ON or power
window timer operates
30 Y/BR Glass hatch switch Glass hatch switched released
→ Glass
hatch switched closed Battery voltage
→ 0
37 B/R Key switch and key lock sole-
noid (insert) Key inserted in IGN key cylinder (ON)
→
Key removed from IGN key cylinder (OFF) Battery voltage
→ 0
39 L CAN-H ——
40 P CAN-L ——
43 R/B Back door latch (door ajar
switch) Door open (ON)
→ Door close (OFF) 0 → Battery voltage
47 SB Front door switch LH Door open (ON) → Door close (OFF) 0 → Battery voltage
48 R/Y Rear door switch LH Door open (ON) → Door close (OFF) 0 → Battery voltage
53 L/W Glass hatch lock actuator Glass hatch switched released
→ Glass
hatch switch pressed 0
→ Battery voltage for 300 msec.
57 Y/R Battery power supply —Battery voltage
59 G Front door lock assembly LH
(actuator) (unlock) Driver door lock knob
(locked → unlocked) 0
→ Battery voltage
65 V All door lock actuators (lock) Driver door lock knob (neutral → lock) 0 → Battery voltage
66 G/Y Front door lock actuator RH,
rear door lock actuators LH/RH
and back door lock actuator
(unlock) Door lock and unlock switch (locked
→
unlocked) 0
→ Battery voltage
67 B Ground ——
70 W/B Battery power supply —Battery voltage
PIIA2344E
Page 810 of 3383
POWER DOOR LOCK SYSTEMBL-29
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Revision: November 2009 2006 QX56
Trouble Diagnoses Symptom ChartEIS005ZE
BCM Power Supply and Ground Circuit CheckEIS005ZF
1. CHECK FUSE AND FUSIBLE LINK
Check the following BCM fuse and fusible link.
NOTE:
Refer to BL-99, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse, refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
SymptomRepair orderRefer to page
Key reminder door function does not operate
properly. 1. Door switch check
BL-31
2. Key switch (insert) checkBL-33
3. Replace BCM.BCS-20
Power door lock does not operate with door lock
and unlock switch on main power window and
door lock/unlock switch or power window and
door lock/unlock switch RH.1. Door lock/unlock switch check
BL-34
2. Replace BCM.BCS-20
Front door lock assembly LH (actuator) does not
operate.1. Front door lock assembly LH (Actuator) check
BL-38
Specific door lock actuator does not operate.1. Front door lock actuator RH check
BL-392. Rear door lock actuator RH/LH checkBL-40
Power door lock does not operate with front door
key cylinder LH operation.1. Front door lock assembly LH (key cylinder
switch) check
BL-42
2. Replace BCM.
BCS-20
Power door lock does not operate.1. BCM power supply and ground circuit check
BL-292. Door lock/unlock switch checkBL-34
Back door opener does not operate.1. Back door power supply and ground circuit
inspection
BL-1152. Door switch check
BL-31
3. Power liftgate switch system inspectionBL-116
Glass hatch lock actuator does not operate
(RF door must be unlocked for normal opera-
tion).1. Glass hatch switch check
BL-36
2. Glass hatch lock actuator checkBL-41
3. Replace BCM.BCS-20
Component PartsTerminal No. (SIGNAL) AmpereNo. Location
BCM 57 (BAT power supply) 15A22 Fuse block (J/B)
BCM 70 (BAT power supply) 50AfFuse and fusible link box
Page 816 of 3383
POWER DOOR LOCK SYSTEMBL-35
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Revision: November 2009 2006 QX56
2. CHECK DOOR LOCK/UNLOCK SWITCH GROUND HARNESS
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch or power window and door lock/unlock switch RH
3. Check continuity between main power window and door lock/ unlock switch connector D8 terminal 17 and ground.
4. Check continuity between power window and door lock/unlock switch RH connector D105 terminal 11 and ground
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK POWER WINDOW BUS CIRCUIT FOR OPEN
1. Disconnect BCM.
2. Check continuity between BCM connector M18 terminal 22 and main power window and door lock/unlock switch connector D7
terminal 14.
3. Check continuity between BCM connector M18 terminal 22 and power window and door lock/unlock switch RH connector D105
terminal 16.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness. 17 - Ground
: Continuity should exist.
LIIA0392E
11 - Ground: Continuity should exist.
LIIA1140E
22 - 14 : Continuity should exist.
LIIA0394E
22 - 16: Continuity should exist.
LIIA1271E
Page 817 of 3383
BL-36
POWER DOOR LOCK SYSTEM
Revision: November 20092006 QX56
4. CHECK POWER WINDOW BUS CIRCUIT FOR SHORT
Check continuity between BCM connector M18 terminal 22 and
ground.
OK or NG
OK >> Replace main power window and door lock/unlock switch or power window and door lock/unlock switch RH
NG >> Repair or replace harness.
Glass Hatch Switch Circuit InspectionEIS00AL6
NOTE:
Repair any front door lock actuator RH malfunction before proceeding with this diagnosis.
1. CHECK GLASS HATCH SWITCH
1. Turn ignition switch OFF.
2. Insure front door lock actuator RH is in the unlock position.
3. Check continuity between glass hatch switch terminal 2 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK HARNESS CONTINUITY
1. Disconnect glass hatch switch.
2. Disconnect BCM.
3. Check continuity between BCM connector M18 (A) terminal 30 and glass hatch switch connector D710 (B) terminal 2.
4. Check continuity between BCM connector M18 (A) terminal 30 and ground.
OK or NG
OK >> Glass hatch switch circuit is OK.
NG >> Repair or replace harness. 22 - Ground
: Continuity should not exist.
LIIA2359E
Connec-
tor Terminals
ConditionContinuity
(+) (– )
D710 2 Ground With the glass hatch switch
pressed
Ye s
With the glass hatch switch
released No
LIIA2399E
30 - 2
: Continuity should exist.
30 - Ground : Continuity should not exist.
LIIA2400E
Page 823 of 3383
BL-42
POWER DOOR LOCK SYSTEM
Revision: November 20092006 QX56
Front Door Lock Assembly LH (Key Cylinder Switch) CheckEIS005ZO
1. CHECK DOOR KEY CYLINDER SWITCH LH
With CONSULT-II
Check front door lock assembly LH (key cylinder switch) ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in
DATA MONITOR mode with CONSULT –II. Refer to BL-27, "
DATA MONITOR" .
When key inserted in front key cylinder is turned to LOCK:
When key inserted in front key cylinder is turned to UNLOCK:
Without CONSULT-II
Check voltage between main power window and door lock/unlock
switch connector D7 terminals 4, 6 and ground.
OK or NG
OK >> Front door lock assembly LH (key cylinder switch) signal is OK.
NG >> GO TO 2.
2. CHECK DOOR KEY CYLINDER SWITCH LH GROUND HARNESS
Check continuity between front door lock assembly LH (key cylinder
switch) connector (A) D14 terminal 5 and body ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness. KEY CYL LK-SW : ON
KEY CYL UN-SW : ON
LIIA0188E
Connector
Terminals
ConditionVoltage (V)
(Approx.)
(+) (– )
D7 4
Ground Neutral/Unlock
5
Lock 0
6 Neutral/Lock
5
Unlock 0
LIIA0566E
Connector TerminalsContinuity
D14 5 – Ground Yes
WIIA1067E
Page 824 of 3383
POWER DOOR LOCK SYSTEMBL-43
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Revision: November 2009 2006 QX56
3. CHECK DOOR KEY CYLINDER SWITCH LH
Check continuity between front door lock assembly LH (key cylinder
switch) terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace front door lock assembly LH (key cylinder switch). Refer to BL-131, "
FRONT DOOR
LOCK" .
4. CHECK DOOR KEY CYLINDER HARNESS
Check continuity between main power window and door lock/unlock
switch connector (A) D7 terminals 4, 6 and front door lock assembly
LH (key cylinder switch) connector (B) D14 terminals 1, 6 and body
ground.
OK or NG
OK >> Replace main power window and door lock/unlock switch.
NG >> Repair or replace harness.
Terminals Condition Continuity
1 – 5 Key is turned to UNLOCK or neutral.
No
Key is turned to LOCK. Yes
5 – 6 Key is turned to LOCK or neutral.
No
Key is turned to UNLOCK. Yes
LIIA1573E
Connector Terminals ConnectorTerminals
(wire color) Continuity
A: Main
power win-
dow and
door lock/ unlock
switch 4B: Front
door lock
assembly LH (key
cylinder switch) 1Yes
66Y es
4, 6 Ground No
WIIA1068E
Page 826 of 3383
REMOTE KEYLESS ENTRY SYSTEMBL-45
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Revision: November 2009 2006 QX56
System DescriptionEIS005ZQ
INPUTS
Power is supplied at all times
to BCM terminal 70
through 50A fusible link (letter f , located in the fuse and fusible link box).
to BCM terminal 57
through 15A fuse [No. 22, located in the fuse block (J/B)].
When the key is inserted in the key switch and key lock solenoid, power is supplied
to BCM terminal 37
through key switch and key lock solenoid terminals 3 and 4
through 10A fuse [No. 19, located in the fuse block (J/B)].
When the ignition switch is ACC or ON, power is supplied
to BCM terminal 11
through 10A fuse [No. 4, located in the fuse block (J/B)].
When the ignition switch is ON or START, power is supplied
to BCM terminal 38
through 10A fuse (No. 59, located in the fuse and relay box).
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 body grounds B7 and B19.
Keyfob signal is input into the BCM from the remote keyless entry receiver.
The remote keyless entry system controls operation of the
power door lock
back door opener
interior lamp and step lamps
panic alarm
hazard and horn reminder
keyless power window down (open)
auto door lock operation