Infiniti QX4 (R50). Manual — part 375
4
CHECK HORN RELAY CIRCUIT
1. Disconnect horn relay connector.
2. Check voltage between terminals 3 and 5.
3. Check voltage between terminals 6 and 7.
SEL348X
OK or NG
OK
©
Check harness for open or short between horn relay and smart entrance control unit.
NG
©
Check harness for open or short.
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-317
THEFT WARNING HEADLAMP ALARM CHECK
=NBEL0123S10
1
CHECK THEFT WARNING HEADLAMP ALARM OPERATION
1. Disconnect smart entrance control unit connector.
2. Apply ground to smart entrance control unit terminal 4.
SEL570X
Refer to wiring diagram in EL-304.
OK or NG
OK
©
Headlamp alarm is OK.
NG
©
GO TO 2.
2
CHECK HEADLAMP OPERATION
Does headlamp come on when turning lighting switch “ON”?
Yes
©
Check harness for open or short between headlamp relay and smart entrance control
unit.
No
©
Check headlamp system. Refer to “HEADLAMP”.
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont’d)
EL-318
Description
NBEL0124
The following systems are controlled by the smart entrance control unit.
I
Warning chime
I
Rear window defogger and door mirror defogger timer
I
Power door lock
I
Multi-remote control system
I
Theft warning system
I
Interior lamp timer
I
Electric sunroof and power window timer
I
Headlamp battery saver
I
Battery saver
For detailed description and wiring diagrams, refer to the relevant pages for the each system.
The smart entrance control unit receives data from the switches and sensors to control their corresponding
system relays and actuators.
INPUT/OUTPUT
NBEL0124S01
System
Input
Output
Power door lock
Door lock and unlock switch LH and RH
Key switch (Insert)
Door switches
Door key cylinder switches
Door lock actuator
Multi-remote control
Key switch (Insert)
Ignition switch (ACC)
Door switches
Front door unlock sensor LH
Door lock and unlock switch LH
Remote controller signal
Horn relay
Headlamp relay (LH and RH)
Interior lamp
Multi-remote control relay
Door lock actuator
Warning chime
Key switch (Insert)
Ignition switch (ON)
Lighting switch (1st)
Seat belt switch
Front door switch LH
Warning chime (located in smart entrance
control unit)
Rear window defogger and
door mirror defogger timer
Ignition switch (ON)
Rear window defogger switch
Rear window defogger relay
Theft warning
Ignition switch (ACC, ON)
Door switches
Hood switch
Glass hatch switch
Door key cylinder switches (lock/unlock)
Door unlock sensores
Horn relay
Headlamp relay (LH and RH)
Security indicator
Interior lamp timer
Door switches
Front door unlock sensor LH
Ignition switch (ON)
Key switch (Insert)
Interior lamp
Electric sunroof and power
window timer
Front door switches
Ignition switch (ON)
Power window relay
Headlamp battery saver timer
Front door switches
Ignition switch (ON)
Headlamp battery saver control unit
Battery saver
Ignition switch (ON)
Door switches
Driver’s door unlock sensor
Key switch (Insert)
Interior lamp
Luggage room lamp
Spot lamp
Vanity mirror illumination lamp
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
SMART ENTRANCE CONTROL UNIT
Description
EL-319
BATTERY SAVER
NBEL0124S02
The lamp turns off automatically when the interior lamp, luggage room lamp, spot lamp or/and vanity mirror
illumination is illuminated with the ignition key in the OFF position, if the lamp remains lit by the door switch
open signal or if the lamp switch is in the ON position for more than 10 minutes.
After lamps turn off by the battery saver system, the lamps illuminate again when:
I
driver’s door is locked or unlocked,
I
door is opened or closed,
I
key is inserted in ignition key cylinder.
SMART ENTRANCE CONTROL UNIT
Description (Cont’d)
EL-320
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