2001 INFINITI QX4 Ac system

After performing preliminary check, go to symptom chart
below.
SYMPTOM CHARTNBEL0123S02
REFERENCE PAGE (EL- ) 306 308 309 312 313 314 315 316 318 277
SYMPTOM
PRELIMINARY CHECK
POWER SUPPLY AND GROUND CIRCUIT CHECK
DOOR, HOOD AND GLASS HATCH SWITCH CHECK
SECURITY INDICATOR LAMP CHECK
DOOR UNLOCK SENSOR CHECK
DOOR KEY CYLINDER SWITCH CHECK
BACK DOOR KEY CYLINDER SWITCH CHECK
HORN ALARM CHECK
THEFT WARNING HEADLAMP ALARM CHECK
Check ªMULTI-REMOTE CONTROLº system.
1Theft warning indicator does
not illuminate for 30 seconds.XXXX
Theft warning
system cannot
be set by ....
All items X X X X
Door outside key X X
Back door key X X
Multi-remote control XX
2
*1 Theft warning
system does not
alarm when ...
Any door is opened. X X
Any door is
unlocked without
using key or multi-
remote controllerXX
3
Theft warning
alarm does not
activate.
All function X X X
Horn alarm X X
Headlamp alarm XX
4
Theft warning
system cannot be
canceled by ....
Door outside key X X
Back door key X X
Multi-remote control XX
X : Applicable
*1: Make sure the system is in the armed phase.
Before starting trouble diagnoses above, perform preliminary
check, EL-306.
Symptom numbers in the symptom chart correspond with those of
preliminary check.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-307

SEL336X
POWER SUPPLY AND GROUND CIRCUIT CHECKNBEL0123S03Power Supply Circuit CheckNBEL0123S0301
Terminals Ignition switch position
(+) (þ) OFF ACC ON
10 GroundBattery
voltageBattery
voltageBattery
voltage
21 Ground 0VBattery
voltageBattery
voltage
33 Ground 0V 0VBattery
voltage
SEL013W
Ground Circuit CheckNBEL0123S0302
Terminals Continuity
16 - Ground Yes
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-308

DOOR, HOOD AND GLASS HATCH SWITCH CHECK=NBEL0123S04Door Switch CheckNBEL0123S0401
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-301.
OK or NG
OK©Door switch is OK, and go to hood switch check.
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
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-309

Hood Switch Check=NBEL0123S0402
1 CHECK HOOD SWITCH FITTING CONDITION
OK or NG
OK©GO TO 2.
NG©Adjust installation of hood switch or hood.
2 CHECK HOOD SWITCH INPUT SIGNAL
Check voltage between smart entrance control unit terminal 27 and ground.
SEL337X
Refer to wiring diagram in EL-300.
OK or NG
OK©Hood switch is OK, and go to glass hatch switch check.
NG©GO TO 3.
3 CHECK HOOD SWITCH
1. Disconnect hood switch connector.
2. Check continuity between hood switch terminals 1 and 2.
SEL338X
OK or NG
OK©Check the following.
IHood switch ground circuit
IHarness for open or short between smart entrance control unit and hood switch
NG©Replace hood switch.
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-310

Glass Hatch Switch Check=NBEL0123S0403
1 CHECK GLASS HATCH SWITCH INPUT SIGNAL
Check voltage between smart entrance control unit terminal 38 and ground.
SEL339X
Refer to wiring diagram in EL-300.
OK or NG
OK©Glass hatch switch is OK.
NG©GO TO 2.
2 CHECK GLASS HATCH SWITCH
1. Disconnect glass hatch switch connector.
2. Check continuity between glass hatch switch terminals 1 and 2.
SEL340X
OK or NG
OK©Check the following.
IGlass hatch switch ground circuit
IHarness for open or short between smart entrance control unit and glass hatch switch
NG©Replace glass hatch switch.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-311

SECURITY INDICATOR LAMP CHECK=NBEL0123S05
1 CHECK INDICATOR LAMP OUTPUT SIGNAL
1. Disconnect smart entrance control unit connector.
2. Check voltage between control unit terminal 31 and ground.
SEL341X
Refer to wiring diagram in EL-300.
OK or NG
OK©Security indicator lamp is OK.
NG©GO TO 2.
2 CHECK INDICATOR LAMP
OK or NG
OK©GO TO 3.
NG©Replace indicator lamp.
3 CHECK POWER SUPPLY CIRCUIT FOR INDICATOR LAMP
1. Disconnect security lamp connector.
2. Check voltage between indicator lamp terminal 1 and ground.
SEL342X
OK or NG
OK©Check harness for open or short between security indicator lamp and control unit.
NG©Check the following.
I7.5A fuse [No. 24, located in fuse block (J/B)]
IHarness for open or short between security indicator lamp and fuse
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-312

DOOR UNLOCK SENSOR CHECK=NBEL0123S06
1 CHECK DOOR UNLOCK SENSOR INPUT SIGNAL
Check voltage between smart entrance control unit terminals 26, 36 or 37 and ground.
SEL343X
Refer to wiring diagram in EL-304.
OK or NG
OK©Door unlock sensor is OK.
NG©GO TO 2.
2 CHECK DOOR UNLOCK SENSOR
1. Disconnect door unlock sensor connector.
2. Check continuity between door unlock sensor terminals.
SEL344X
OK or NG
OK©Check the following.
IDoor unlock sensor ground circuit
IHarness for open or short between smart entrance control unit and door unlock sensor
NG©Replace door unlock sensor.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-313

FRONT DOOR KEY CYLINDER SWITCH CHECK=NBEL0123S07
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-303.
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 LH connector.
2. Check continuity between door key cylinder switch LH 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.
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-314