For USA

System Description
Control of the headlamp system operation is dependent upon the position of the combination switch (lighting 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 central processing unit of 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.

If voltage is applied to a high beam solenoid, the bulb shade will move, even a xenon headlamp bulb comes out, and a high beam and a low beam are changed.

OUTLINE
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), and
- to ignition relay, located in the IPDM E/R (intelligent power distribution module engine room)
- through 10 A fuse [No. 71 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. 78 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 50 A fusible link (letter F, located in the fuse and fusible link box)
- to BCM (body control module) terminal 55
- through 10 A fuse [No. 18 located in the fuse block (J/B)]
- to BCM (body control module) terminal 42
- through 10 A fuse [No. 19, located in the fuse block (J/B)]
- to combination meter terminal 43.

With the ignition switch in the ON or START position, power is supplied
- to ignition relay, located in the IPDM E/R (intelligent power distribution module engine room)
- through 10 A fuse [No. 1, located in the fuse block (J/B)]
- to BCM (body control module) terminal 38
- through 10 A fuse [No. 14, located in the fuse block (J/B)]
- to combination meter terminals 41 and 42.

With the ignition switch in the ACC or ON position, power is supplied
- through 10 A fuse [No. 6, located in the fuse block (J/B)]
- to BCM (body control module) terminal 11.

Ground is supplied
- to BCM (body control module) terminal 52
- through grounds M30 and M66
- to IPDM E/R (intelligent power distribution module engine room) terminals 38 and 60
- through grounds E17 and E43
- to combination meter terminals 45 and 46
- through grounds M30 and M66.

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. 76, located in the IPDM E/R]
- through IPDM E/R terminal 20
- to headlamp RH terminal 3, and
- to 15 A fuse [No. 86, located in the IPDM E/R]
- through IPDM E/R terminal 30
- to headlamp LH terminal 3.

Ground is supplied
- to headlamp RH terminal 4
- through grounds E17 and E43
- to headlamp LH terminal 4
- through grounds E17 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 (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 low relay coil, which when energized, directs power
- to 15 A fuse [No. 76, located in the IPDM E/R]
- through IPDM E/R terminal 20
- to headlamp RH terminal 3, and
- to 15 A fuse [No. 86, located in the IPDM E/R]
- through IPDM E/R terminal 30
- to headlamp LH terminal 3
- to 10 A fuse [No. 72, located in the IPDM E/R]
- through IPDM E/R terminal 27
- to headlamp RH terminal 2, and
- to 10 A fuse [No. 74, located in the IPDM E/R]
- through IPDM E/R terminal 28
- to headlamp LH terminal 2.

Ground is supplied
- to headlamp RH terminals 4 and 8
- through grounds E17 and E43
- to headlamp LH terminals 4 and 8
- through grounds E17 and E43.

With power and ground supplied, the high beam headlamps illuminate.
If voltage is applied to a high beam solenoid, the bulb shade will move, even a xenon headlamp bulb comes out, and a high beam and a low beam are changed.
The unified meter and A/C amp that received the high beam request signal by BCM across the CAN communication makes a high beam indicator lamp turn on in combination meter.

COMBINATION SWITCH READING FUNCTION
Refer to "COMBINATION SWITCH READING FUNCTION" in Body Control Module.

EXTERIOR LAMP BATTERY SAVER CONTROL
When 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 mode can be changed by the function setting of CONSULT-II.

AUTO LIGHT OPERATION
Refer to, "System Description" in "AUTO LIGHT SYSTEM".

VEHICLE SECURITY SYSTEM
The vehicle security system will flash the high beams if the system is triggered. Refer to "VEHICLE SECURITY (THEFT WARNING) SYSTEM".

XENON HEADLAMP
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.

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.

CAN Communication Unit
Refer to Information Bus.