Infiniti M45 (Y34). Manual - part 634

HEADLAMP (FOR USA)

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Disassembly and Assembly

AKS002FF

DISASSEMBLY

1.

Turn plastic cap (low) counterclockwise and unlock it.

2.

Turn xenon bulb socket counterclockwise and unlock it. 

3.

Unlock retaining spring and remove xenon bulb (low).

4.

Disconnect HID control unit connector and remove HID control unit mounting screws.

5.

Turn halogen bulb socket counterclockwise and unlock it. 

6.

Remove halogen bulb from headlamp.

7.

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

8.

Remove front turn signal and parking lamp bulb from its socket.

ASSEMBLY

Assemble in the reverse order of disassembly, taking care of the following points.

CAUTION:

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When the HID control unit is removed, reinstall it securely and avoid any looseness.

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

1.

Retaining springs

2.

Front turn signal and parking lamp bulb

3.

Front turn signal and parking lamp bulb socket

4.

Seal rubber

5.

Plastic cap (low)

6.

Xenon bulb

7.

Halogen bulb

8.

Xenon bulb socket

9.

HID control unit

10. Xenon headlamp assembly

PKIA7884E

HID control unit mounting screws

: 3.2 N·m (0.33 kg-m, 28 in-lb)

LT-44

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -

PFP:26010

Component Parts and Harness Connector Location

AKS002FG

System Description

AKS002FH

The headlamp system for Canada vehicles is equipped with a daytime light control unit that activates the high
beam headlamps at approximately half illumination whenever the engine is running. If the parking brake is
applied before the engine is started the daytime lights will not be illuminated. The daytime lights will illuminate
once the parking brake is released. Thereafter, the daytime lights will continue to operate when the parking
brake is applied.
And battery saver system is controlled by the headlamp battery saver control unit and BCM.
Power is supplied at all times

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to headlamp relay-1 terminal 2,

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to headlamp relay-1 terminal 3

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through 20A fuse [No. 57, located in fuse, fusible link and relay block (J/B)],

PKIA6064E

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -

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to headlamp relay-1 terminal 7

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through 20A fuse [No. 55, located in fuse, fusible link and relay block (J/B)],

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to headlamp relay-2 terminals 1 and 3

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through 15A fuse (No. 73, located in fuse, fusible link and relay block),

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to headlamp battery saver control unit terminal 7

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through 10A fuse [No. 6, located in fuse block (J/B) No. 1], and

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to BCM terminal 105

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through 10A fuse [No. 3, located in fuse block (J/B) No. 1].

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

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to daytime light control unit terminal 3

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through 10A fuse (No. 82, located in fuse, fusible link and relay block), 

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to headlamp battery saver control unit terminal 1

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to BCM terminal 68

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through 10A fuse [No. 1, located in fuse block (J/B) No. 1].

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

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to BCM terminal 60

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through 10A fuse [No. 21, located in fuse block (J/B) No. 1].

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

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to daytime light control unit terminal 2

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through 10A fuse [No. 14, located in fuse block (J/B) No. 1].

Ground is supplied

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to daytime light control unit terminal 16 

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through grounds E42 and E62,

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to headlamp battery saver control unit terminals 4 and 11

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through grounds M25 and M115, and

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to BCM terminals 56 and 113

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through grounds M24 and M114.

HEADLAMP OPERATION
Power Supply to Low Beam and High Beam

When lighting switch is in 2ND or PASS position,
ground is supplied

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to headlamp relay-1 terminal 1 

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to headlamp relay-2 terminal 2

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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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through lighting switch terminals 12 and 8

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through grounds M25 and M115.

Headlamp relays are energized and then power is supplied to headlamps.

Low Beam Operation

When the lighting switch is turned to 2ND position and placed in LOW positions,
power is supplied 

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from headlamp relay-1 terminals 5 and 6

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to headlamp LH and RH terminals 3.

Ground is supplied 

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to headlamp LH and RH terminals 4

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through grounds E24 and E42.

LT-46

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -

With power and ground supplied, the low beam headlamps illuminate.

High Beam Operation/Flash-to-Pass Operation

When the lighting switch is turned to 2ND position and placed in HIGH position or PASS position,
power is supplied 

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from headlamp relay-2 terminal 5

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to daytime light control unit terminals 4 and 5

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to combination meter terminal 9 for the HIGH BEAM indicator.

Ground is supplied 

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to headlamp LH terminal 2

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through daytime light control unit terminals 10 and 13,

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to combination meter terminal 10 for the HIGH BEAM indicator

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through lighting switch terminals 9 and 8

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through grounds M25 and M115,

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to headlamp RH terminal 2

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through daytime light control unit terminals 9 and 14

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through lighting switch terminals 6 and 5

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through grounds M25 and M115.

With power and ground supplied, the high beam headlamps and HIGH BEAM indicator illuminate.

BATTERY SAVER CONTROL

When the ignition switch is turned from ON (or START) to OFF (or ACC) positions while headlamps are illumi-
nated, the RAP signal is supplied to terminal 10 of the headlamp battery saver control unit from BCM terminal
135.
After counting 45 seconds by the RAP signal from the BCM to headlamp battery saver control unit, the ground
supply to both terminal 1 of headlamp relay-1 and terminal 2 of headlamp relay-2 from headlamp battery saver
control unit terminals 2 and 8 is terminated.
Then headlamps are turned off.
The headlamps are turned off when front door (driver or passenger side) is opened even if 45 seconds have
not passed after the 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 con-
trol,
ground is supplied

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to headlamp battery saver control unit terminals 5 and 13 from lighting switch terminal 11

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to headlamp relay-1 terminal 1 and headlamp relay-2 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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through lighting switch terminal 12.

Then headlamps illuminate again.

AUTO LIGHT OPERATION

For auto light operation, refer to 

LT-8, "AUTO LIGHT OPERATION"

  in “HEADLAMP (USA)”. 

DAYTIME LIGHT OPERATION

With the engine running, the lighting switch in the OFF or 1ST position and parking brake released,
power is supplied 

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through daytime light control unit terminal 7

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to headlamp RH terminal 1

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through headlamp RH terminal 2

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to daytime light control unit terminal 9

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through daytime light control unit terminal 6

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to headlamp LH terminal 1

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through headlamp LH terminal 2

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to daytime light control unit terminal 10.