Infiniti QX4. Electrical System (2003 year). Manual — part 26
FIG. 4
NBEL0387S04
MEL434P
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Wiring Diagram — D/LOCK — (Cont’d)
EL-405
FIG. 5
NBEL0387S05
MEL852L
POWER DOOR LOCK
Wiring Diagram — D/LOCK — (Cont’d)
EL-406
FIG. 6
NBEL0387S06
MEL354Q
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Wiring Diagram — D/LOCK — (Cont’d)
EL-407
SEL670Y
CONSULT-II Inspection Procedure
=NBEL0388
“DOOR LOCK”
NBEL0388S01
1.
Turn ignition switch “OFF”.
2.
Connect “CONSULT-II” and “CONSULT-II CONVERTER” to
the data link connector.
SKIA3098E
3.
Turn ignition switch “ON”.
4.
Touch “START (NISSAN BASED VHCL)”.
SEL398Y
5.
Touch “SMART ENTRANCE”.
If “SMART ENTRANCE” is not indicated, go to GI-42, “CON-
SULT-II Data Link Connector (DLC) Circuit”.
SEL023X
6.
Touch “DOOR LOCK”.
SEL274W
7.
Select diagnosis mode.
“DATA MONITOR”, “ACTIVE TEST” and “WORK SUPPORT”
are available.
POWER DOOR LOCK
CONSULT-II Inspection Procedure
EL-408
CONSULT-II Application Items
NBEL0389
“DOOR LOCK”
NBEL0389S01
Data Monitor
NBEL0389S0101
Monitored Item
Description
KEY ON SW
Indicates [ON/OFF] condition of key switch.
LOCK SW DR/AS
Indicates [ON/OFF] condition of lock signal from lock/unlock switch LH and RH.
DOOR SW-RR
Indicates [ON/OFF] condition of door switch (Rear).
UNLK SW DR/AS
Indicates [ON/OFF] condition of unlock signal from lock/unlock switch LH and RH.
KEY CYL LK-SW
Indicates [ON/OFF] condition of lock signal from key cylinder.
KEY CYL UN-SW
Indicates [ON/OFF] condition of unlock signal from key cylinder.
LK BUTTON/SIG
Indicates [ON/OFF] condition of lock signal from keyfob.
UN BUTTON/SIG
Indicates [ON/OFF] condition of unlock signal from keyfob.
IGN ON SW
Indicates [ON/OFF] condition of ignition switch.
DOOR SW-DR
Indicates [ON/OFF] condition of front door switch LH.
DOOR SW-AS
Indicates [ON/OFF] condition of front door switch RH.
Active Test
NBEL0389S0102
Test Item
Description
ALL D/LK MTR
This test is able to check all door lock actuators lock operation. These actuators lock when
“ON” on CONSULT-II screen is touched.
DR D/UN MTR
This test is able to check front door lock actuator LH unlock operation. The actuator unlocks
when “ON” on CONSULT-II screen is touched.
NON DR D/UN
This test is able to check door lock actuators (except front door lock actuator LH) unlock opera-
tion. These actuators unlock when “ON” on CONSULT-II screen is touched.
Work Support
NBEL0389S0103
Work Item
Description
DOOR LOCK-UNLOCK SET
Door unlock mode can be selected among the following periods:
쐌
ON (When an UNLOCK signal is sent from front key cylinder LH once, driver’s door will be
unlocked. Then, if an UNLOCK signal is sent from front key cylinder LH again within 5
seconds, all other door will be unlocked.)/OFF (When an unlock signal sent from door key
cylinder LH, all door will be unlocked.)
쐌
MODE 1 (ON)/MODE 2 (OFF)
ANTI-LOCK OUT SET
Key reminder door mode can be changed in this mode. Selects ON-OFF of key reminder door
mode.
쐌
MODE 1 (ON)/MODE 2 (OFF)
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
CONSULT-II Application Items
EL-409
Trouble Diagnoses
NBEL0390
SYMPTOM CHART
NBEL0390S01
REFERENCE PAGE (EL-
)
SYMPTOM
MAIN
POWER
SUPPL
Y
AND
GROUND
CIRCUIT
CHECK
DOOR
SWITCH
CHECK
KEY
SWITCH
(INSER
T)
CHECK
DOOR
LOCK/UNLOCK
SWITCH
CHECK
FRONT
DOOR
KEY
CYLINDER
SWITCH
CHECK
BACK
DOOR
KEY
CYLINDER
SWITCH
CHECK
DOOR
LOCK
ACTUA
T
O
R
CHECK
Key reminder door system does not operate
properly.
X
X
X
X
Specific door lock actuator does not operate.
X
X
Power door lock does not operate with door
lock and unlock switch (LH and RH) on door
trim.
X
X
Power door lock does not operate with front
door key cylinder operation.
X
X
Power door lock does not operate with back
door key cylinder operation.
X
X
POWER DOOR LOCK
Trouble Diagnoses
EL-410
SEL007YA
MAIN POWER SUPPLY AND GROUND CIRCUIT CHECK
=NBEL0390S02
Main Power Supply Circuit Check
NBEL0390S0201
Terminals
Ignition switch
(+)
(–)
OFF
ACC
ON
Connector
Terminal
(Wire color)
M123
49 (G/R)
Ground
Battery
voltage
Battery
voltage
Battery
voltage
51 (W/R)
If NG, check the following.
쐌
40A fuseible link (letter f, located in fuse and fusible link box).
쐌
M145 circuit breaker.
쐌
7.5A fuse [No. 24, located in fuse block (J/B)].
쐌
Harness for open or short between smart entrance control unit
and circuit breaker.
쐌
Harness for open or short between circuit breaker and fusible
link.
쐌
Harness for open or short between smart entrance control unit
and fuse
SEL008Y
Ground Circuit Check
NBEL0390S0202
Terminals
Continuity
(+)
(–)
Connector
Terminal
(Wire color)
M122
43 (B)
Ground
Yes
M123
64 (B)
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-411
DOOR SWITCH CHECK
=NBEL0390S03
1
CHECK DOOR SWITCH INPUT SIGNAL
With CONSULT-II
Check door switches (“DOOR SW-DR”, “DOOR SW-AS”, “DOOR SW-RR”) in “DATA MONITOR” mode with CONSULT-II.
SEL009Y
Without CONSULT-II
Check voltage between smart entrance control unit harness connector M121 terminals 1 (G/OR), 2 (Y) or 3 (R/L) and
ground.
SEL010Y
Refer to wiring diagram in EL-402.
OK or NG
OK
䊳
Door switch is OK.
NG
䊳
GO TO 2.
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-412
2
CHECK DOOR SWITCH
1. Disconnect door switch connector.
2. Check the following.
쐌
Continuity between front door switch harness connector B9 (LH) or B68 (RH) terminals 1 and 2
쐌
Continuity between front door switch harness connector B9 (LH) or B68 (RH) terminal 3 and ground
쐌
Continuity between back door switch harness connector D208 terminals 1 and 2
쐌
Continuity between rear door switch harness connector B18 (LH) or B71 (RH) terminal 1 and ground
SEL287Y
OK or NG
OK
䊳
Check the following.
쐌
Door switches ground circuit (Front or back door) or rear door switches ground condi-
tion
쐌
Harness for open or short between smart entrance control unit and door switch
NG
䊳
Replace door switch.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-413
KEY SWITCH (INSERT) CHECK
=NBEL0390S04
1
CHECK KEY SWITCH INPUT SIGNAL
With CONSULT-II
Check key switch (“KEY ON SW”) in “DATA MONITOR” mode with CONSULT-II.
SEL315W
Without CONSULT-II
Check voltage between smart entrance control unit harness connector M122 terminal 25 (W/R) and ground.
SEL011Y
Refer to wiring diagram in EL-403.
OK or NG
OK
䊳
Key switch is OK.
NG
䊳
GO TO 2.
2
CHECK KEY SWITCH (INSERT)
Check continuity between terminals 1 and 2.
SEL308X
OK or NG
OK
䊳
Check the following.
쐌
7.5A fuse [No. 24, located in fuse block (J/B)]
쐌
Harness for open or short between key switch and fuse
쐌
Harness for open or short between smart entrance control unit and key switch
NG
䊳
Replace key switch.
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-414
DOOR LOCK/UNLOCK SWITCH CHECK
=NBEL0390S05
1
CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL
With CONSULT-II
Check door lock/unlock switch (“LOCK SW DR/AS”/“UNLK SW DR/AS”) in “DATA MONITOR” mode with CONSULT-II.
SEL341W
Without CONSULT-II
1. Remove key from ignition key cylinder.
2. Check the signal between smart entrance control unit harness connector M122 terminal 33 (BR) and ground with oscil-
loscope when door lock/unlock switch is turned “LOCK” or “UNLOCK”.
3. Make sure signals which are shown in the figure below can be detected during 10 sec. just after door lock/unlock
switch is turned “LOCK” or “UNLOCK”.
SEL699Y
Refer to wiring diagram in EL-407.
OK or NG
OK
䊳
Door lock/unlock switch is OK.
NG
䊳
Check the following.
쐌
Ground circuit for each front power window switch
쐌
Harness for open or short between each front power window switch and smart
entrance control unit connector
If above systems are normal, replace the front power window switch.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-415
FRONT DOOR KEY CYLINDER SWITCH LH CHECK
=NBEL0390S06
1
CHECK FRONT DOOR KEY CYLINDER SWITCH LH INPUT SIGNAL (LOCK/UNLOCK SIGNAL)
With CONSULT-II
Check front door key cylinder switch LH (“KEY CYL LK-SW”/“KEY CYL UN-SW”) in “DATA MONITOR” mode with CON-
SULT-II.
SEL342WF
Without CONSULT-II
1. Check the signal between smart entrance control unit harness connector M122 terminal 33 (BR) and ground with oscil-
loscope when key inserted in front door key cylinder is turned “LOCK” or “UNLOCK”.
2. Make sure signals which are shown in the figure below can be detected during 10 sec. just after key is turned “LOCK”
or “UNLOCK”.
SEL700Y
Refer to wiring diagram in EL-407.
OK or NG
OK
䊳
Front door key cylinder switch LH is OK.
NG
䊳
GO TO 2.
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-416
2
CHECK FRONT DOOR KEY CYLINDER SWITCH LH
1. Disconnect front door key cylinder switch LH connector.
2. Check continuity between front door key cylinder switch LH terminals.
SEL313XB
OK or NG
OK
䊳
Check the following.
쐌
Front door key cylinder switch LH ground circuit
쐌
Harness for open or short between smart entrance control unit and power window
main switch
쐌
Harness for open or short between power window main switch and front door key cyl-
inder switch LH
NG
䊳
Replace front door key cylinder switch LH.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-417
BACK DOOR KEY CYLINDER SWITCH CHECK
=NBEL0390S07
1
CHECK BACK DOOR KEY CYLINDER SWITCH INPUT SIGNAL (LOCK/UNLOCK SIGNAL)
With CONSULT-II
Check back door key cylinder switch (“KEY CYL LK-SW”/“KEY CYL UN-SW”) in “DATA MONITOR” mode with CONSULT-
II.
SEL342WG
Without CONSULT-II
Check voltage between smart entrance control unit harness connector M121 terminals 10 (LG) or 11 (Y) and ground.
SEL286Y
Refer to wiring diagram in EL-404.
OK or NG
OK
䊳
Back door key cylinder switch is OK.
NG
䊳
GO TO 2.
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-418
2
CHECK BACK DOOR KEY CYLINDER SWITCH
1. Disconnect back door key cylinder switch connector.
2. Check continuity between back door key cylinder switch terminals.
SEL315X
OK or NG
OK
䊳
Check the following.
쐌
Back door key cylinder switch ground circuit
쐌
Harness for open or short between smart entrance control unit and back door key cyl-
inder switch
NG
䊳
Replace back door key cylinder switch.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-419
DOOR LOCK ACTUATOR CHECK
=NBEL0390S08
1
CHECK DOOR LOCK ACTUATOR OPERATION
With CONSULT-II
1. Select “ACTIVE TEST” in “DOOR LOCK” with CONSULT-II.
2. Select “ALL D/LK MTR” and touch “ON”.
3. Then, select “DR D/UN MTR” and touch “ON”.
4. Select “NON DR D/UN” and touch “ON”.
SEL343W
NOTE:
If CONSULT-II is not available, skip this procedure and go to the next step.
OK or NG
OK
䊳
Door lock actuator is OK.
NG
䊳
GO TO 2.
POWER DOOR LOCK
Trouble Diagnoses (Cont’d)
EL-420
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