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.

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).

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 3
- through 10 A fuse [No. 12, located in the fuse block (J/B)], and
- to BCM (body control module) terminal 35
- through 10 A fuse [No. 12, located in the fuse block (J/B)].

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 2
- through 10 A fuse [No. 9, located in the fuse block (J/B)].

Ground is supplied
- to daytime light control unit terminals 13,14, and 16
- through body grounds E115 and E129, and
- to BCM (body control module) terminals 8, 27, and 63
- through body grounds M57, M61, E15, and E24.

HEADLAMP OPERATION

Low Beam Operation
With the lighting switch in 2ND position, the BCM (body control module) receives input requesting the head-lamps to illuminate. This input is communicated to the IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines. The central processing unit of the IPDM E/R controls the headlamp low relay coil, which when energized, directs power
- to 15 A fuse [No. 50, located in the IPDM E/R]
- through terminal 27 of the IPDM E/R
- to terminal 1 of headlamp RH, and
- to 15 A fuse [No. 49, located in the IPDM E/R]
- through terminal 21 of the IPDM E/R
- to terminal 1 of headlamp LH.

Ground is supplied at all times
- to terminal 2 of headlamp RH
- through body grounds E115 and E129, and
- to terminal 2 of headlamp LH
- through body grounds E15 and E24.

With power and ground supplied, low beam head lamps illuminate.

High Beam Operation/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 requesting the headlamp high beams to illuminate. This input is communicated to the IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines. The central processing unit of the IPDM E/R controls the headlamp high relay coil, which when energized, directs power
- to 10 A fuse [No. 47, located in the IPDM E/R]
- through terminal 24 of the IPDM E/R
- to terminal 4 of the daytime light control unit
- through terminal 7 of the daytime light control unit
- to terminal 1 of headlamp RH, and
- to 10 A fuse [No. 48, located in the IPDM E/R]
- through terminal 22 of the IPDM E/R
- to terminal 5 of the daytime light control unit
- through terminal 6 of the daytime light control unit
- to terminal 1 of headlamp LH.

Ground is supplied
- to terminal 2 of headlamp RH
- to terminal 9 of the daytime light control unit
- through terminals 14 of the daytime light control unit
- through body grounds E115 and E129, and
- to terminal 2 of headlamp LH
- to terminal 10 of the daytime light control unit
- through terminals 13 of the daytime light control unit
- through body grounds E115 and E129.

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

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 feature is activated.

Under this condition, the headlamps remain illuminated for 5 minutes, unless the combination switch (lighting switch) position is changed. If the combination switch (lighting switch) position is changed, then the headlamps are turned off.

AUTO LIGHT OPERATION
For auto light operation, refer to "System Description"

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 7
- to terminal 1 of RH headlamp
- through terminal 2 of RH headlamp
- to daytime light control unit terminal 9
- through daytime light control unit terminal 6
- to terminal 1 of LH headlamp
- through terminal 2 of LH headlamp
- to daytime light control unit terminal 10.

Ground is supplied
- to daytime light control unit terminals 13, 14, and 16
- through body grounds E115 and E129.

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

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 head lamps 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.

Part 1:

Part 2:

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.

CAN Communication System Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.