Infiniti QX4 (R50). Manual — part 303
MEL304D
Replacement
For removal and installation of spiral cable, refer to RS-18,
“Installation — Air Bag Module and Spiral Cable”.
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Each switch can be replaced without removing combination
switch base.
MEL326G
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To remove combination switch base, remove base attaching
screw.
SEL151V
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Before installing the steering wheel, align the steering wheel
guide pins with the screws which secure the combination
switch as shown in the left figure.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
COMBINATION SWITCH
Replacement
EL-29
Check
NBEL0011
MEL133M
STEERING SWITCH
Check
EL-30
Component Parts and Harness Connector
Location
NBEL0159
SEL460X
System Description
NBEL0188
The headlamp operation is controlled by the lighting switch which is built into the combination switch and
headlamp battery saver control unit. And the headlamp battery saver system is controlled by the headlamp
battery saver control unit and smart entrance control unit.
OUTLINE
NBEL0188S01
Power is supplied at all times
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to headlamp LH relay terminals 1 and 3
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through 15A fuse (No. 60, located in the fuse and fusible link box), and
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to headlamp LH relay terminal 6
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through 20A fuse (No. 32, located in the fuse and fusible link box), and
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to headlamp RH relay terminals 1 and 3
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through 15A fuse (No. 59, located in the fuse and fusible link box), and
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to headlamp RH relay terminal 6
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through 20A fuse (No. 31, located in the fuse and fusible link box), and
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to headlamp battery saver control unit terminal 7, and
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to smart entrance control unit terminal 10
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through 7.5A fuse [No. 24, located in the fuse block (J/B)].
When the ignition switch is in the ON or START position, power is supplied
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to headlamp battery saver control unit terminal 1
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through 10A fuse [No. 16, located in the fuse block (J/B)], and
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to headlamp battery saver control unit terminal 10,
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to auto light control unit terminal 1 and
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to smart entrance control unit terminal 33
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through 7.5A fuse [No. 11, located in the fuse block (J/B)].
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
HEADLAMP (FOR USA) — XENON TYPE —
Component Parts and Harness Connector Location
EL-31
When the ignition switch is in the ACC or ON position, power is supplied
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to auto light control unit terminal 2
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through 10A fuse [No. 9, located in the fuse block (J/B)]
Ground is supplied
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to headlamp battery saver control unit terminals 4 and 11
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through body grounds M77 and M111, and M4,M66 and M147
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to auto light control unit terminal 5
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through body grounds M4, M66 and M147.
Power Supply to Low Beam and High Beam
NBEL0188S0101
When lighting switch is in 2ND or PASS position, ground is supplied
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to headlamp relay (LH and RH) terminal 2 from headlamp battery saver control unit terminals 2 and 8
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through headlamp battery saver control unit terminals 3 and 9,
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from lighting switch terminal 12.
Headlamp relays (LH and RH) are energized and then power is supplied to headlamps (LH and RH).
LOW BEAM OPERATION
NBEL0188S02
When the lighting switch is turned to the 2ND position and placed in LOW (“B”) position, power is supplied
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from terminal 7 of each headlamp relay
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to terminal 3 of each headlamp
Ground is supplied
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to terminal 4 of each headlamp
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through body grounds E13 and E41.
With power and ground supplied, the headlamp(s) will illuminate.
HIGH BEAM OPERATION/FLASH-TO-PASS OPERATION
NBEL0188S03
When the lighting switch is turned to the 2ND position and placed in HIGH (“A”) position or PASS (“C”) position,
power is supplied
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from terminal 5 of headlamp LH relay
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to terminal 1 of headlamp LH, and
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to combination meter terminal 26 for the HIGH BEAM indicator
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from terminal 5 of headlamp RH relay
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to terminal 1 of headlamp RH.
Ground is supplied
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to headlamp LH terminal 2
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to combination meter terminal 27 for the HIGH BEAM indicator
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through lighting switch terminals 6 and 5
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through body grounds E13 and E41, and
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to headlamp RH terminal 2
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through lighting switch terminals 9 and 8
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through body grounds E13 and E41.
With power and ground supplied, the high beams and the high beam indicator illuminate.
BATTERY SAVER CONTROL
NBEL0188S04
When the ignition switch is turned from ON (or START) to OFF (or ACC) positions while headlamps illuminate,
the RAP signal is supplied to terminal 10 of the headlamp battery saver control unit from smart entrance con-
trol unit terminal 5.
After counting 45 seconds by the RAP signal from the smart entrance control unit to headlamp battery saver
control unit, the ground supply to terminal 2 of the headlamp LH and RH relay from headlamp battery saver
control unit terminals 2 and 8 is terminated.
Then the headlamps are turned off.
The headlamps are turned off when driver or passenger side door is opened even if 45 seconds have not
passed after ignition switch is turned from ON (or START) to OFF (or ACC) positions while headlamps are
illuminated.
When the lighting switch is turned from OFF to 2ND after headlamps are turned to off by the battery saver
control, ground is supplied
HEADLAMP (FOR USA) — XENON TYPE —
System Description (Cont’d)
EL-32
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