INFINITI QX4 2001 Factory Service Manual
Page 1441 of 2395
Wiring Diagram Ð D/LOCK ÐNBEL0109FIG. 1NBEL0109S01
MEL848L
POWER DOOR LOCK
Wiring Diagram Ð D/LOCK Ð
EL-256
Page 1442 of 2395
FIG. 2NBEL0109S02
MEL849L
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Wiring Diagram Ð D/LOCK Ð (Cont'd)
EL-257
Page 1443 of 2395
FIG. 3NBEL0109S03
MEL850L
POWER DOOR LOCK
Wiring Diagram Ð D/LOCK Ð (Cont'd)
EL-258
Page 1444 of 2395
FIG. 4NBEL0109S04
MEL851L
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Wiring Diagram Ð D/LOCK Ð (Cont'd)
EL-259
Page 1445 of 2395
FIG. 5NBEL0109S05
MEL852L
POWER DOOR LOCK
Wiring Diagram Ð D/LOCK Ð (Cont'd)
EL-260
Page 1446 of 2395
Trouble DiagnosesNBEL0110SYMPTOM CHARTNBEL0110S01
REFERENCE PAGE (EL- ) 262 263 264 265 266 267 268
SYMPTOM
MAIN POWER SUPPLY AND GROUND CIRCUIT CHECK
DOOR SWITCH CHECK
KEY SWITCH (INSERT) CHECK
DOOR LOCK/UNLOCK SWITCH CHECK
FRONT DOOR KEY CYLINDER SWITCH CHECK
BACK DOOR KEY CYLINDER SWITCH CHECK
DOOR LOCK ACTUATOR CHECK
Key reminder door system does not operate
properly.XXX 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.XX
Power door lock does not operate with front
door key cylinder operation.XX
Power door lock does not operate with back
door key cylinder operation.XX
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
POWER DOOR LOCK
Trouble Diagnoses
EL-261
Page 1447 of 2395
SEL304X
MAIN POWER SUPPLY AND GROUND CIRCUIT CHECK=NBEL0110S02Main Power Supply Circuit CheckNBEL0110S0201
Terminal Ignition switch
(+) (þ) OFF ACC ON
10
GroundBattery
voltageBattery
voltageBattery
voltage
11
SEL013W
Ground Circuit CheckNBEL0110S0202
Terminals Continuity
16 - Ground Yes
POWER DOOR LOCK
Trouble Diagnoses (Cont'd)
EL-262
Page 1448 of 2395
DOOR SWITCH CHECK=NBEL0110S05
1 CHECK DOOR SWITCH INPUT SIGNAL
Check voltage between smart entrance control unit terminals 28, 29 or 40 and ground.
SEL305X
Refer to wiring diagram in EL-256.
OK or NG
OK©Door switch is OK.
NG©GO TO 2.
2 CHECK DOOR SWITCH
1. Disconnect door switch connector.
2. Check continuity between door switch terminals.
SEL306X
OK or NG
OK©Check the following.
IDoor switch ground circuit (Front LH, back door) or door switch ground condition
IHarness for open or short between smart entrance control unit and door switch
NG©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-263
Page 1449 of 2395
KEY SWITCH (INSERT) CHECK=NBEL0110S06
1 CHECK KEY SWITCH INPUT SIGNAL
Check voltage between smart entrance control unit terminal 32 and ground.
SEL307X
Refer to wiring diagram in EL-257.
OK or NG
OK©Key switch is OK.
NG©GO TO 2.
2 CHECK KEY SWITCH (INSERT)
Check continuity between terminals 1 and 2.
SEL308X
OK or NG
OK©Check the following.
I7.5A fuse [No. 24, located in fuse block (J/B)]
IHarness for open or short between key switch and fuse
IHarness for open or short between smart entrance control unit and key switch
NG©Replace key switch.
POWER DOOR LOCK
Trouble Diagnoses (Cont'd)
EL-264
Page 1450 of 2395
DOOR LOCK/UNLOCK SWITCH CHECK=NBEL0110S03
1 CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL
1. Disconnect smart entrance control unit connector.
2. Check continuity between control unit terminal 23 or 35 and ground.
SEL309X
Refer to wiring diagram in EL-257.
OK or NG
OK©Door lock/unlock switch is OK.
NG©GO TO 2.
2 CHECK DOOR LOCK/UNLOCK SWITCH
1. Disconnect door lock/unlock switch connector.
2. Check continuity between each door lock/unlock switch terminals.
IPower window main switch (Door lock/unlock switch LH)
SEL310X
IDoor lock/unlock switch RH
SEL311X
OK or NG
OK©Check the following.
IGround circuit for door lock/unlock switch
IHarness for open or short between door lock/unlock switch and smart entrance control
unit connector
NG©Replace door lock/unlock 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-265