lock INFINITI QX4 2001 Factory Service Manual

FIG. 5NBEL0109S05
MEL852L
POWER DOOR LOCK
Wiring Diagram Ð D/LOCK Ð (Cont'd)
EL-260

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

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

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

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

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

FRONT DOOR KEY CYLINDER SWITCH CHECK=NBEL0110S07
1 CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL (LOCK/UNLOCK SIGNAL)
Check voltage between smart entrance control unit terminals 30 or 41 and ground.
SEL312X
Refer to wiring diagram in EL-258.
OK or NG
OK©Door key cylinder switch LH is OK.
NG©GO TO 2.
2 CHECK DOOR KEY CYLINDER SWITCH
1. Disconnect door key cylinder switch connector.
2. Check continuity between door key cylinder switch terminals.
SEL313X
OK or NG
OK©Check the following.
IDoor key cylinder switch LH ground circuit
IHarness for open or short between smart entrance control unit and door key cylinder
switch LH
NG©Replace door key cylinder switch LH.
POWER DOOR LOCK
Trouble Diagnoses (Cont'd)
EL-266

BACK DOOR KEY CYLINDER SWITCH CHECK=NBEL0110S08
1 CHECK BACK DOOR KEY CYLINDER SWITCH INPUT SIGNAL (LOCK/UNLOCK SIGNAL)
Check voltage between smart entrance control unit terminals 30 or 41 and ground.
SEL314X
Refer to wiring diagram in EL-258.
OK or NG
OK©Back door key cylinder switch is OK.
NG©GO TO 2.
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©Check the following.
IBack door key cylinder switch ground circuit
IHarness for open or short between smart entrance control unit and back door key cyl-
inder switch
NG©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-267

DOOR LOCK ACTUATOR CHECK=NBEL0110S04
1 CHECK DOOR LOCK ACTUATOR CIRCUIT
Check voltage for door lock actuator.
IDoor lock actuator front LH
SEL316X
IDoor lock actuator front RH, rear and back
SEL317X
Refer to wiring diagram in EL-259.
OK or NG
OK©GO TO 2.
NG©Replace smart entrance control unit. (Before replacing smart entrance control unit, per-
form ªDOOR LOCK/UNLOCK SWITCH CHECKº.)
POWER DOOR LOCK
Trouble Diagnoses (Cont'd)
EL-268

2 CHECK DOOR LOCK ACTUATOR
1. Disconnect door lock actuator connector.
2. Apply 12V direct current to door lock actuator and check operation.
SEL318X
SEL319X
OK or NG
OK©Check harness for open or short between smart entrance control unit connector and door
lock actuator.
NG©Replace door lock actuator.
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-269