Headlamp (For Canada)

System Description
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 BCM.

Power is supplied at all times
- to headlamp high relay located in the IPDM E/R (intelligent power distribution module engine room).
- to headlamp low relay located in the IPDM E/R (intelligent power distribution module engine room).
- to CPU (central processing unit) in the IPDM E/R (intelligent power distribution module engine room)
- through 15 A fuse [No. 73, located in the IPDM E/R (intelligent power distribution module engine room)],

Power is also supplied at all times
- to BCM (body control module) terminal 7
- through 50 A fusible link [letter F, located in the fuse and fusible link box].

With the ignition switch in the ON or START position, power is supplied
- to daytime light control unit terminal 12
- through 10 A fuse [No. 88, located in the IPDM E/R (intelligent power distribution module engine room)], and
- to BCM (body control module) terminal 35
- through 10 A fuse [No. 1, located in the fuse block (J/B)].
- to CPU (central processing unit) in the IPDM E/R (intelligent power distribution module engine room)
- through 10 A fuse [No. 80, located in the IPDM E/R (intelligent power distribution module engine room)],

With the ignition switch in the ACC or ON position, power is supplied
- to BCM (body control module) terminal 36
- through 10 A fuse [No. 6, located in the fuse block (J/B)].

With the ignition switch in the START position, power is supplied
- to daytime light control unit terminal 1
- through 10 A fuse [No. 9, located in the fuse block (J/B)].

Ground is supplied
- to daytime light control unit terminal 9
- through grounds E17 and E43, and
- to BCM (body control module) terminal 8
- through grounds E17 and E43.
- to IPDM E/R (intelligent power distribution module engine room) terminals 14 and 45
- through grounds E17 and E43.

HEADLAMP OPERATION

Low Beam Operation
With the lighting switch in 2ND position, the BCM (body control module) receives input signal requesting the headlamps to 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) in the IPDM E/ R controls the headlamp low relay coil, which when energized, directs power
- to 15 A fuse [No. 83, located in the IPDM E/R]
- through terminal 27 of the IPDM E/R
- to terminal 3 of headlamp RH, and
- to 15 A fuse [No. 84, located in the IPDM E/R]
- through terminal 21 of the IPDM E/R
- to terminal 3 of headlamp LH.

Ground is supplied at all times
- to terminal 8 of headlamp RH
- through grounds E17 and E43, and
- to terminal 8 of headlamp LH
- through grounds E17 and E43.

With power and ground supplied, low beam headlamps illuminate.

High Beam Operation (When engine stopped)/Flash-to-Pass Operation
With the lighting switch in 2ND position and placed in HIGH or PASS position, the BCM (body control module) receives input signal requesting the headlamp high beams to 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) in the IPDM E/R controls the headlamp high relay coil and daytime light relay-2 turned on, which when energized, directs power
- to 10 A fuse [No. 85, located in the IPDM E/R]
- through terminal 22 of the IPDM E/R
- to terminal 22 of the IPDM E/R
- through terminal 5 of the daytime light control unit
- to terminal 6 of daytime light control unit
- through terminal 2 of headlamp LH
- to 10A fuse [No. 86, located in the IPDM E/R] through terminal 24 of the IPDM E/R
- to terminal 24 of the IPDM E/R
- through terminal 2 of the daytime light relay-2 and
- through terminal 1 of the daytime light control unit
- to 10A fuse [No. 86, located in the IPDM E/R]
- through terminal 24 of the IPDM E/R
- to terminal 24 of the IPDM E/R
- through terminal 5 of the daytime light relay-2
- to terminal 3 of daytime light relay-2
- through terminal 2 of headlamp RH.

Ground is supplied
- to terminal 1 of the daytime light relay-2
- through grounds E17 and E43
- to terminal 4 of headlamp RH
- through grounds E17 and E43
- to terminal 4 of headlamp LH
- through terminal 7 of the daytime light control unit
- to terminal 8 of headlamp RH
- through grounds E17 and E43
- to terminal 8 of headlamp LH
- through grounds E17 and E43
- to terminal 9 of the daytime light control unit
- through grounds E17 and E43.

When power and ground supplied, the high beam headlamps illuminate. High beam indicator illuminates when combination meter receives input signal requesting high beam indicator to illuminate. This is communicated to BCM across the CAN communication lines.

COMBINATION SWITCH READING FUNCTION
Refer to "Combination Switch".

EXTERIOR LAMP BATTERY SAVER CONTROL
With the combination switch (lighting switch) is in the 2ND position (ON), and the ignition switch is turned from ON or ACC to OFF, the battery saver control function is activated.

Under this condition, the headlamps remain illuminated for 5 minutes, then the headlamps are turned off. Exterior lamp battery saver control made can be changed by the function setting of CONSULT-II.

AUTO LIGHT OPERATION
For auto light operation, refer to LT-64, "System Description" in AUTO LIGHT SYSTEM.

DAYTIME LIGHT OPERATION
With the engine running, the lighting switch in the OFF or 1ST position and parking brake released, power is supplied
- through daytime light control unit terminal 6
- to terminal 2 of headlamp LH
- through terminal 4 of headlamp LH
- to daytime light control unit terminal 7
- through daytime light control unit terminal 8
- to terminal 2 of headlamp RH.

Ground is supplied
- to terminal 4 of headlamp RH
- through grounds E17 and E43, and
- to daytime light control unit terminal 9
- through grounds E17 and E43.

Because the high beam headlamps are now wired in series, they operate at half illumination.

If the lighting switch is in the HIGH position, daytime light operation is canceled. On this occasion, power is supplied
- through terminal 24 of the IPDM E/R
- to daytime light control unit terminal 1

Daytime light control unit is canceled power supplying from terminal 8 to terminal 2 of headlamp RH (series power supplying is canceled). And then high beam is ON.

Operation:

OPERATION
After starting the engine with the lighting switch in the OFF or 1ST position, the headlamp high beam automatically turns on. Lighting switch operations other than the above are the same as conventional light systems.

XENON HEADLAMP (IF EQUIPPED)
Xenon type headlamp is adopted to the low beam headlamps. Xenon bulbs do not use a filament. Instead, they produce light when a high voltage current is passed between two tungsten electrodes through a mixture of xenon (an inert gas) and certain other metal halides. In addition to added lighting power, electronic control of the power supply gives the headlamps stable quality and tone color.

Following are some of the many advantages of the xenon type headlamp.
- The light produced by the headlamps is a white color comparable to sunlight that is easy on the eyes.
- Light output is nearly double that of halogen headlamps, affording increased area of illumination.
- The light features a high relative spectral distribution at wavelengths to which the human eye is most sensitive. This means that even in the rain, more light is reflected back from the road surface toward the vehicle, for added visibility.
- Power consumption is approximately 25 percent less than halogen headlamps, reducing battery load.