Content .. 872 873 874 875 ..

Infiniti M35/M45 Y50. Manual - part 874

HEADLAMP (FOR USA) - CONVENTIONAL TYPE -

LT-41

Disassembly and Assembly

NKS003OJ

DISASSEMBLY

Turn plastic cap counterclockwise and unlock it.

Unlock retaining spring and remove halogen bulb (low).

Disconnect the socket connected to the bulb (low).

Turn bulb (high) counterclockwise and unlock it.

Remove bulb (high) and disconnect connector it.

Turn front turn signal lamp bulb socket counterclockwise and unlock it.

Remove front turn signal lamp bulb from its socket.

Turn parking lamp bulb socket counterclockwise and unlock it.

Remove parking lamp bulb from its socket.

10. Turn front side marker lamp bulb socket counterclockwise and unlock it.

11. Remove front side marker lamp bulb from its socket.

ASSEMBLY

Note the following, and installation is the reverse order of removal.

CAUTION:

After installing bulb, be sure to install plastic cap and bulb socket securely to insure watertightness.

Bulb socket (low)

Retaining spring

Bulb (low)

Seal packing

Plastic cap

Side marker lamp bulb socket

Side marker lamp bulb

Plastic cap

Seal packing

10. Bulb (high)

11. Front turn signal lamp bulb socket

12.

Front turn signal lamp bulb

13. Headlamp housing assembly

14. Parking lamp bulb

15.

Parking lamp bulb socket

SKIB4158E

LT-42

HEADLAMP (FOR USA) - XENON TYPE -

PFP:26010

Component Parts and Harness Connector Location

NKS003OK

System Description

NKS003OL

The control of the headlamp system operation is dependent upon the position of the combination switch (light-
ing switch). When the lighting switch is placed in the 2ND position, the BCM (body control module) receives
input signal requesting the headlamps (and tail lamps) illuminate. This input signal is communicated to the
IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines. The CPU
(central processing unit) located in the IPDM E/R controls the headlamp high and headlamp low relay coils.
These relays, when energized, direct power to the respective headlamps, which then illuminate.

PKIC1983E

HEADLAMP (FOR USA) - XENON TYPE -

LT-43

OUTLINE

Power is supplied at all times

●

to headlamp high relay, located in IPDM E/R and

●

to headlamp low relay, located in IPDM E/R, from battery direct,

●

through 15A fuse (No. 71, located in IPDM E/R)

●

to CPU, located in IPDM E/R,

●

through 15A fuse (No. 78, located in IPDM E/R)

●

to CPU, located in IPDM E/R,

●

through 50A fusible link (letter F, located in fuse and fusible link block)

●

to BCM terminal 55,

●

through 10A fuse [No. 21, located in fuse block (J/B)]

●

to BCM terminal 42 and

●

to combination meter terminal 23,

●

through 10A fuse [No. 19, located in fuse block (J/B)]

●

to unified meter and A/C amp. terminal 54,

●

through 10A fuse [No. 22, located in fuse block (J/B)]

●

to key slot terminal 1.

When the ignition switch is in the ON or START position, power is supplied

●

to CPU, located in IPDM E/R,

●

through 15A fuse [No. 1, located in fuse block (J/B)]

●

to BCM terminal 38,

●

through 10A fuse [No. 14, located in fuse block (J/B)]

●

to combination meter terminal 12,

●

through 10A fuse [No. 12, located in fuse block (J/B)]

●

to unified meter and A/C amp. terminal 53.

When the ignition switch is in the ACC or ON position, power is supplied

●

through 10A fuse [No. 6, located in fuse block (J/B)]

●

to BCM terminal 11.

Ground is supplied

●

to BCM terminal 52

●

to combination meter terminals 9, 10, and 11

●

to unified meter and A/C amp. terminals 55 and 71

●

to push-button ignition switch (push switch) terminal 1

●

to key slot terminal 8

●

through grounds M16 and M70,

●

to IPDM E/R terminals 38 and 51

●

through grounds E22 and E43.

LT-44

HEADLAMP (FOR USA) - XENON TYPE -

HEADLAMP OPERATION
Low Beam Operation

With the lighting switch in 2ND position, the BCM receives input signal requesting the headlamps to illuminate.
This input signal is communicated to the IPDM E/R across the CAN communication lines. The CPU located in
the IPDM E/R controls the headlamp low relay coil, which when energized, directs power

●

through 15A fuse (No. 76, located in IPDM E/R)

●

through IPDM E/R terminal 20

●

to front combination lamp RH terminal 8,

●

through 15A fuse (No. 86, located in IPDM E/R)

●

through IPDM E/R terminal 30

●

to front combination lamp LH terminal 8.

Ground is supplied

●

to front combination lamp RH terminal 4

●

to front combination lamp LH terminal 4

●

through grounds E22 and E43.

With power and ground supplied, low beam headlamps illuminate.

High Beam Operation/Flash-to-Pass Operation

With the lighting switch in 2ND position and placed in HIGH or PASS position, the BCM receives input signal
requesting the headlamp high beams and low beams to illuminate. This input signal is communicated to the
IPDM E/R across the CAN communication lines. The CPU located in the IPDM E/R controls the headlamp
high relay coil and low relay coil, which when energized, directs power

●

through 15A fuse (No. 76, located in IPDM E/R)

●

through IPDM E/R terminal 20

●

to front combination lamp RH terminal 8,

●

through 15A fuse (No. 86, located in IPDM E/R)

●

through IPDM E/R terminal 30

●

to front combination lamp LH terminal 8,

●

through 10A fuse (No. 72, located in IPDM E/R)

●

through IPDM E/R terminal 27

●

to front combination lamp RH terminal 6,

●

through 10A fuse (No. 74, located in IPDM E/R)

●

through IPDM E/R terminal 28

●

to front combination lamp LH terminal 6.

Ground is supplied

●

to front combination lamp RH terminal 4

●

to front combination lamp LH terminal 4

●

to front combination lamp RH terminal 2

●

to front combination lamp LH terminal 2

●

through grounds E22 and E43.

With power and ground supplied, the high beam and low beam headlamps illuminate.
The unified meter and A/C amp. that received the high beam request signal by BCM across the CAN commu-
nication makes a high beam indicator lamp turn on in the combination meter.

Content .. 872 873 874 875 ..