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LIGHTING SYSTEM

K ELECTRICAL

SECTION
LIGHTING SYSTEM
LT B

E
CONTENTS
PRECAUTIONS ......................................................... 4
. Tail Lamp Relay System Check ............................. 29 . F
Precautions for Supplemental Restraint System Switch Circuit Inspection ....................................... 29 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- General Information for Xenon Headlamp Trouble
SIONER" ................................................................. 4
. Diagnosis ............................................................... 30
. G
General Precautions for Service Operations ........... 4 . Caution: ................................................................. 30
.
Wiring Diagrams and Trouble Diagnosis ................. 4 . Xenon Headlamp Trouble Diagnosis ..................... 30 .
HEADLAMP (FOR USA) ........................................... 6 . Aiming Adjustment ................................................. 31 .
H
Component Parts and Harness Connector Location 6 ..... LOW BEAM AND HIGH BEAM .......................... 31 .
System Description ................................................. 6
. Bulb Replacement ................................................. 32 .
OUTLINE .............................................................. 6
. HEADLAMP (OUTER SIDE), FOR LOW BEAM 32 ...
BATTERY SAVER CONTROL ............................. 7 . HEADLAMP (INNER SIDE), FOR HIGH BEAM... 32 I
AUTO LIGHT OPERATION .................................. 8 . PARKING LAMP (CLEARANCE LAMP) ............. 33 .
VEHICLE SECURITY SYSTEM ........................... 8 . FRONT TURN SIGNAL LAMP ........................... 33 .
XENON HEADLAMP ............................................ 8 . FRONT SIDE MARKER LAMP .......................... 33 . J
Schematic ............................................................... 9
. Removal and Installation ....................................... 33 .
Wiring Diagram -- H/LAMP -- .............................. 10 . REMOVAL .......................................................... 33.
Terminals and Reference Values for Battery Saver INSTALLATION .................................................. 34 .
LT
Control Unit ........................................................... 16
. Disassembly and Assembly ................................... 35 .
Terminals and Reference Values for BCM ............ 17 . DISASSEMBLY .................................................. 35 .
Work Flow ............................................................. 17
. ASSEMBLY ........................................................ 36 .
Preliminary Check ................................................. 18
. HEADLAMP (FOR CANADA) - DAYTIME LIGHT L
SETTING CHANGE FUNCTION FOR AUTO SYSTEM - ................................................................. 37
.
LIGHT SYSTEM ................................................. 18 . Component Parts and Harness Connector Location 37 ...
INSPECTION FOR POWER SUPPLY AND System Description ................................................ 37 . M
GROUND CIRCUIT ............................................ 18 . HEADLAMP OPERATION .................................. 38 .
CONSULT-II Function (IVMS) ............................... 20 . BATTERY SAVER CONTROL ............................ 39 .
CONSULT-II BASIC OPERATION PROCEDURE AUTO LIGHT OPERATION ................................ 39 .
... 20 DAYTIME LIGHT OPERATION .......................... 39 .
WORK SUPPORT .............................................. 21 . OPERATION ....................................................... 40 .
DATA MONITOR ................................................ 21 . Schematic .............................................................. 41
.
ACTIVE TEST .................................................... 22. Wiring Diagram -- DTRL -- .................................. 42 .
On Board Diagnosis .............................................. 22 . Terminals and Reference Value for Daytime Light
DIAGNOSIS ITEM .............................................. 22 . Control Unit ............................................................ 51
.
SWITCH MONITOR ........................................... 22 . Terminals and Reference Value for BCM .............. 52 .
Symptom Chart ..................................................... 23
. Terminals and Reference Value for Battery saver
HEADLAMP SYSTEM ........................................ 23 . Control Unit ............................................................ 52
.
AUTO LIGHT SYSTEM ...................................... 25 . Symptom Chart ...................................................... 52.
Lighting Switch (AUTO) System Check ................. 25 . Aiming Adjustment ................................................. 53 .
Optical Sensor System Check .............................. 27 . Bulb Replacement ................................................. 53 .
Headlamp Relay System Check ........................... 28 .

Edition; 2004 May LT-1 2005 Q45
Removal and Installation ....................................... 53 . System Description ................................................89 .
Disassembly and Assembly ................................... 54 . OUTLINE ............................................................89
.
HEADLAMP AIMING CONTROL (AUTO) ............... 55 . MULTI-REMOTE CONTROL SYSTEM OPERA-
Component Parts and Harness Connector Location 55 ... TION ...................................................................90
.
System Description ................................................ 55 . LOW TIRE PRESSURE WARNING CONTROL
OUTLINE ............................................................ 55. SYSTEM .............................................................91
.
HEADLAMP AIMING CONTROL OPERATION... 56 Schematic ..............................................................92
.
Schematic .............................................................. 57
. Wiring Diagram -- TURN -- ..................................93 .
Wiring Diagram --LT-H/AIM-- ............................... 58 . Symptom Chart ......................................................97 .
Terminals and Reference Values for Headlamp Aim- Electrical Components Inspection ..........................98 .
ing Sensor ............................................................. 62
. COMBINATION FLASHER UNIT CHECK ..........98 .
How to Proceed With Trouble Diagnosis ............... 62 . Bulb Replacement ..................................................98 .
Preliminary Check ................................................. 62 . FRONT TURN SIGNAL LAMP ............................98 .
CONSULT-II Function (HEAD LAMP LEVELIZER) 64 ... REAR TURN SIGNAL LAMP ..............................98 .
CONSULT-II BASIC OPERATION PROCEDURE Removal and Installation ........................................98 .
... 64 FRONT TURN SIGNAL LAMP ............................98 .
WORK SUPPORT .............................................. 64 . SIDE TURN SIGNAL LAMP ................................98 .
ACTIVE TEST .................................................... 65 . REAR TURN SIGNAL LAMP ..............................98 .
SELF-DIAG RESULTS ....................................... 65 . LIGHTING AND TURN SIGNAL SWITCH ...............99 .
Check Aiming Control System ............................... 67 . Removal and Installation ........................................99 .
Symptom Chart ...................................................... 68 . Switch Circuit Inspection ........................................99 .
Headlamp Aiming Motor Does Not Operate (Both HAZARD SWITCH .................................................. 100 .
Sides) .................................................................... 68
. Removal and Installation ...................................... 100 .
Headlamp Aiming Motor Does Not Operate (One STOP LAMP ........................................................... 101.
Side) ...................................................................... 70
. Wiring Diagram -- STOP/L -- ............................. 101 .
DTC B2081 [INITIAL NOT DONE] ......................... 71 . Bulb Replacement ................................................ 102 .
DTC B2082 [SENSOR OUT OF RANGE], DTC STOP LAMP ..................................................... 102 .
B2083 [SEN SIG NOT PLAUSIBLE] ..................... 72 . HIGH-MOUNTED STOP LAMP ........................ 102 .
DTC B2084 [VOLTAGE UNDER LIMIT] ................ 72 . Removal and Installation ...................................... 102 .
DTC B2085 [LOW BEAM SIG OPEN LINE] .......... 72 . STOP LAMP ..................................................... 102 .
DTC B2086 [FRQ. OVER LIMIT] ........................... 73 . HIGH-MOUNTED STOP LAMP ........................ 102 .
DTC B2087 [SHORT TO GROUND] ..................... 73 . BACK-UP LAMP .................................................... 103 .
DTC B2088 [SHORT TO BATTERY] ..................... 74 . Wiring Diagram -- BACK/L -- ............................. 103 .
Removal and Installation ....................................... 75 . Bulb Replacement ................................................ 103 .
REMOVAL .......................................................... 75 . Removal and Installation ...................................... 103 .
INSTALLATION ................................................... 75 . PARKING, LICENSE PLATE AND TAIL LAMPS ... 104 .
FRONT FOG LAMP ................................................. 76 . Component Parts and Harness Connector Location .104
Component Parts and Harness Connector Location 76 ... System Description .............................................. 104 .
System Description ................................................ 76 . OUTLINE .......................................................... 104
.
OUTLINE ............................................................ 76. LIGHTING OPERATION BY LIGHTING SWITCH .104
BATTERY SAVER CONTROL ............................ 77 . BATTERY SAVER CONTROL .......................... 104 .
Schematic .............................................................. 78
. Schematic ............................................................ 106
.
Wiring Diagram -- F/FOG -- ................................. 79 . Wiring Diagram -- TAIL/L -- ................................ 107 .
Terminals and Reference Values for Headlamp Bat- Trouble Diagnoses ............................................... 112 .
tery Saver Control Unit .......................................... 82 . Tail Lamp Relay Inspection .................................. 112 .
Terminals and Reference Values for BCM ............. 82 . Bulb Replacement ................................................ 113 .
Work Flow .............................................................. 83
. LICENSE PLATE LAMP .................................... 113 .
Preliminary Check ................................................. 83 . FRONT COMBINATION LAMP ......................... 113 .
INSPECTION FOR POWER SUPPLY AND REAR COMBINATION LAMP ........................... 113 .
GROUND CIRCUIT ............................................ 83 . TAIL LAMP ........................................................ 113
.
Front Fog Lamps Do Not Illuminate (Both Sides) ... 84 Removal and Installation ...................................... 113 .
Front Fog Lamp Does Not Illuminate (One Side) ... 86 LICENSE PLATE LAMP .................................... 113 .
Aiming Adjustment ................................................. 86 . FRONT COMBINATION LAMP ......................... 114 .
Bulb Replacement ................................................. 88 . REAR COMBINATION LAMP ........................... 114 .
Removal and Installation ....................................... 88 . TAIL LAMP (TRUNK LID) ................................. 114 .
REMOVAL .......................................................... 88 . INTERIOR ROOM LAMP ....................................... 115 .
INSTALLATION ................................................... 88 . System Description .............................................. 115 .
TURN SIGNAL AND HAZARD WARNING LAMPS... 89 OUTLINE .......................................................... 115
.
Component Parts and Harness Connector Location 89 ... TIMER FUNCTION ........................................... 115 .

Edition; 2004 May LT-2 2005 Q45
LAMP OUTPUT CONTROL FUNCTION ..........116 . Door Control Unit ................................................. 153.
AUTO OFF FUNCTION ....................................116 . Terminals and Reference Values for Rear LH, RH A
LIGHTS ON/OFF MODES ................................117 . Door Control Unit ................................................. 153.
Major Components and the Functions .................119 . Work Flow ............................................................ 153
.
Schematic ........................................................... 120
. Preliminary Check ............................................... 154 . B
Wiring Diagram -- INT/L -- ................................ 121 . INSPECTION FOR POWER SUPPLY AND
Terminals and Reference Values for BCM .......... 127 . GROUND CIRCUIT .......................................... 154 .
Terminals and Reference Values for Driver Door CONSULT-II Function (IVMS) .............................. 156 .
Control Unit (LCU01) ........................................... 128. CONSULT-II BASIC OPERATION PROCEDURE C
Work Flow ........................................................... 128
. . 156
Preliminary Check ............................................... 128
. DATA MONITOR .............................................. 157 .
SETTING CHANGE FUNCTION ...................... 128 . ACTIVE TEST .................................................. 157 . D
INSPECTION FOR POWER AND GROUND On Board Diagnosis ............................................ 158 .
CIRCUIT ........................................................... 129
. DIAGNOSIS ITEM ............................................ 158 .
CONSULT-II Function (IVMS) ............................. 131 . SWITCH MONITOR ......................................... 158 . E
CONSULT-II BASIC OPERATION PROCEDURE Symptom Chart .................................................... 159 .
. 131 DIAGNOSTIC PROCEDURE ........................... 159 .
WORK SUPPORT ............................................ 132 . Bulb Replacement ............................................... 161 .
DATA MONITOR .............................................. 132 . Removal and Installation ..................................... 161 . F
ACTIVE TEST .................................................. 133. DOOR MIRROR LAMP .......................................... 162 .
On Board Diagnosis ............................................ 133 . System Description .............................................. 162 .
DIAGNOSIS ITEM ............................................ 133 . Wiring Diagram -- MIRR/L -- ............................. 163 . G
SWITCH MONITOR ......................................... 134 . Bulb Replacement ............................................... 164 .
Symptom Chart ................................................... 135
. DOOR MIRROR LAMP .................................... 164 .
Interior Lamp Illumination Switch System Check . 135 ILLUMINATION ...................................................... 165 . H
Personal Lamp Switch System Check ................ 136 . System Description .............................................. 165 .
Door Switch System Check ................................. 137 . LIGHTING OPERATION BY LIGHTING SWITCH 165 .
Key Switch and Key Lock Solenoid System Check 139 . BATTERY SAVER CONTROL .......................... 165 .
I
Bulb Replacement ............................................... 141. Schematic ............................................................ 166
.
MAP LAMP (FRONT PERSONAL LIGHT) AND Wiring Diagram -- ILL -- ..................................... 168 .
CONSOLE LAMP (CONSOLE LIGHT) ............ 141 . Removal and Installation ..................................... 179 .
PERSONAL LAMP (REAR PERSONAL LIGHT) 141 . ILLUMINATION CONTROL SWITCH ............... 179 . J
Removal and Installation ..................................... 141 . POWER WINDOW MAIN SWITCH ILLUMINA-
FRONT INTERIOR LAMP ................................ 141 . TION ................................................................. 179
.
REAR INTERIOR LAMP .................................. 141 . CONSOLE BOX LAMP .................................... 179 . LT
IGNITION KEY HOLE ILLUMINATION ............ 142 . GLOVE BOX LAMP .......................................... 179 .
STEP LAMP ........................................................... 143
. FRONT CIGARETTE LIGHTER ILLUMINATION 180 .
Component Parts and Harness Connector Location 143 . REAR ASHTRAY ILLUMINATION .................... 180 . L
System Description ............................................. 144. VANITY MIRROR AND TRUNK ROOM LAMPS ... 181 .
POWER SUPPLY AND GROUND ................... 144 . Wiring Diagram -- INT/L -- ................................. 181 .
OPERATING PROCEDURE ............................ 144 . Bulb Replacement ............................................... 182 .
Schematic ........................................................... 145
. VANITY MIRROR LAMP .................................. 182 . M
Wiring Diagram -- STEP/L -- ............................. 146 . TRUNK ROOM LAMP ...................................... 182 .
Terminals and Reference Values for BCM .......... 152 . BULB SPECIFICATIONS ....................................... 183 .
Terminals and Reference Values for Driver Door Headlamp ............................................................ 183
.
Control Unit (LCU01) ........................................... 152. Exterior Lamp ...................................................... 183
.
Terminals and Reference Values for Passenger Interior Lamp/Illumination .................................... 183 .

Edition; 2004 May LT-3 2005 Q45
PRECAUTIONS

PRECAUTIONS PFP:00011

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS00IZN

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
q To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
General Precautions for Service Operations EKS000XN

q Never work with wet hands.
q Xenon headlamp includes high voltage generating part. Be sure
to disconnect battery negative cable (negative terminal) or
power fuse before removing, installing, or touching the xenon
headlamp (including lamp bulb).
q Turn the lighting switch OFF before disconnecting and connect-
ing the connector.
q When turning the xenon headlamp on and while it is illuminated,
never touch the harness, bulb, and socket of the headlamp.
q When checking the headlamp on/off operation, check it on vehi- PKIA0183E
cle and with the power connected to the vehicle-side connector.
q Do not touch the headlamp bulb glass surface with bare hands or allow oil or grease to get on it. Do not
touch the headlamp bulb just after the headlamp is turned off, because it is very hot.
q Install the xenon headlamp bulb socket correctly. If it is installed
improperly, high-voltage leak or corona discharge may occur
that can melt the bulb, connector, and housing. Do not illuminate
the xenon headlamp bulb out of the headlamp housing. Doing
so can cause fire and harm your eyes.
q When the bulb has burned out, wrap it in a thick vinyl bag and
discard. Do not break the bulb.
q Leaving the bulb removed from the headlamp housing for long
period of time can deteriorate performance of the lens and
reflector (dirt, clouding). Always prepare a new bulb and have it
on hand when replacing the bulb. EL-3422D

q When adjusting the headlamp aiming, turn the aiming adjust-
ment screw only in the tightening direction. (If it is necessary to turn the screw in loosening direction, first
fully loosen the screw, and then turn it in tightening direction.)
q Do not use organic solvent (paint thinner or gasoline) to clean lamps and to remove old sealant.
Wiring Diagrams and Trouble Diagnosis EKS0014T

When reading wiring diagrams, refer to the following:
q Refer to GI-14, "How to Read Wiring Diagrams" in GI section.
q Refer to PG-2, "POWER SUPPLY ROUTING" for power distribution circuit in PG section.

Edition; 2004 May LT-4 2005 Q45
PRECAUTIONS

When performing trouble diagnosis, refer to the following:
q Refer to GI-10, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" in GI section. A
q Refer to GI-26, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section.

Edition; 2004 May LT-5 2005 Q45
HEADLAMP (FOR USA)

HEADLAMP (FOR USA) PFP:26010

Component Parts and Harness Connector Location EKS000UL

PKIB0994E

System Description EKS000SX

The headlamp operation is controlled by the combination switch (lighting switch), which is connected to the
spiral cable and headlamp battery saver control unit. And the headlamp battery saver system is controlled by
the headlamp battery saver control unit and BCM (body control module).
OUTLINE
Power is supplied at all times
q headlamp relay-1 terminal 2 from battery
q to BCM (body control module) terminal 105
q through 10A fuse [No. 3, located in the fuse block (J/B) No. 1]
q to headlamp relay-1 terminal 3
q through 20A fuse [No. 57, located in the fuse, fusible link and relay block (J/B)]
q to headlamp relay-1 terminal 7
q through 20A fuse [No. 55, located in the fuse, fusible link and relay block (J/B)]
q to headlamp relay-2 terminals 2 and 5
q through 15A fuse [No. 73, located in the fuse, fusible link and relay box]
q to headlamp battery saver control unit terminal 7
q through 10A fuse [No. 6, located in the fuse block (J/B) No. 1]
q to tail lamp relay terminals 2 and 6
q through 15A fuse [No. 54, located in the fuse, fusible link and relay block (J/B)].
When the ignition switch is in ON or START position, power is supplied
Edition; 2004 May LT-6 2005 Q45
HEADLAMP (FOR USA)

q to headlamp battery saver control unit terminal 1, and
q to BCM (body control module) terminal 68 A
q through 10A fuse [No. 1, located in the fuse block (J/B) No. 1].
When the ignition switch is in ACC or ON position, power is supplied
B
q to BCM (body control module) terminal 60
q through 10A fuse [No. 21, located in the fuse block (J/B) No. 1].
Ground is supplied C
q to BCM (body control module) terminals 56 and 113
q through grounds M24 and M114
q to headlamp battery saver control unit terminals 4 and 11 D
q through grounds M25 and M115.
Power Supply to Low Beam and High Beam
E
When lighting switch is in 2ND or PASS position, ground is supplied
q to headlamp relay-1 and 2 terminals 1 from headlamp battery saver control unit terminals 2 and 8
q through headlamp battery saver control unit terminals 3 and 9, F
q through lighting switch terminals 12 and 8,
q through grounds M25 and M115.
Headlamp relays are energized and then power is supplied to headlamps. G
Low Beam Operation
When lighting switch is turned to 2ND position and moved to (LOW position), power is supplied
H
q from headlamp relay-1 terminals 5 and 6
q to each headlamp terminal 7.
Ground is supplied I
q to each headlamp terminal 8
q through grounds E24, E42 and E62.
With power and ground supplied, low beam headlamps illuminate. J
High Beam Operation/Flash-to-pass Operation
When lighting switch is turned to 2ND position and moved to (HIGH position or PASS position), power is sup-
plied LT
q from headlamp relay-2 terminal 3
q to each headlamp terminal 13, and
L
q to combination meter terminal 48 for HIGH BEAM indicator.
Ground is supplied
q to headlamp LH terminal 14 M
q to combination meter terminal 47 for HIGH BEAM indicator
q through lighting switch terminals 9 and 8
q through grounds M25 and M115, and
q to headlamp RH terminal 14
q through lighting switch terminals 6 and 5
q through grounds M25 and M115.
With power and ground supplied, the high beams headlamps and the HIGH BEAM indicator illuminate.
NOTE:
Headlamps will be forced to turn off when the driver door is opened with the ignition switch in OFF or
ACC position (when except for lighting switch is in "AUTO" position).
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.

Edition; 2004 May LT-7 2005 Q45
HEADLAMP (FOR USA)

After counting 45 seconds by the RAP signal from the BCM to headlamp battery saver control unit, the ground
supply to terminal 1 of the headlamp relay-1 and -2 from headlamp battery saver control unit terminals 2 and 8
is terminated.
Then the headlamps are turned off.
The headlamps are turned off when driver or passenger door 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 illumi-
nated.
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
q to headlamp battery saver control unit terminals 5 and 13 from lighting switch terminal 11, and then,
q to headlamp relay-1 and -2 terminals 1 from headlamp battery saver control unit terminals 2 and 8
q through headlamp battery saver control unit terminals 3 and 9, and
q through lighting switch terminal 12.
Then headlamps illuminate again.
AUTO LIGHT OPERATION
The auto light control system has an optical sensor inside it that detects outside brightness.
When the lighting switch is in AUTO position, it automatically turns on/off the parking (clearance) lamps and
the headlamps in accordance with the outside brightness. Sensitivity can be adjusted in four steps. For details
of setting, refer to LT-18, "SETTING CHANGE FUNCTION FOR AUTO LIGHT SYSTEM" .
When lighting switch is in "AUTO" position, ground is supplied
q to BCM terminal 14
q from lighting switch terminal 42.
When ignition switch is turn to "ON" or "START" position and
Outside brightness is darker than predetermined level, ground is supplied
q to headlamp relay-1 and 2 terminals 1
q through headlamp battery saver control unit terminal 2, 8 and 4, 11, and
q to tail lamp relay terminal 1
q through headlamp battery saver control unit terminals 6, 14 and 4, 11.
Then headlamp relay-1, 2 and tail lamp relay are energized, headlamps (low or high) and tail lamps are illumi-
nated according to switch position.
Shut Off Delay
While the headlamps are lit in the auto-light operation mode, the ignition switch is turned from "ON" to "OFF"
position. The BCM no longer receives a voltage signal at terminal 68. This starts the auto light shut off delay
timer. The timer is set based on the resistance value at BCM terminal 6. With the timer running, the headlamps
remain lit. When the timer reaches the end of its cycle, the headlamps turn off. Headlamp lighting time can be
adjusted from about 0 to 3 minutes. (This function is not applicable to the tail lamps.)
Auto light shut off delay timer can be adjusted in seven steps. For the details of the setting, refer to LT-18,
"SETTING CHANGE FUNCTION FOR AUTO LIGHT SYSTEM" .
VEHICLE SECURITY SYSTEM
The vehicle security system will cause the high beams to flash if the system is triggered. Refer to BL-155,
"VEHICLE SECURITY (THEFT WARNING) SYSTEM" .
XENON HEADLAMP
Xenon type lamps are used for 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 strong lighting power, electronic control of
the power supply gives the headlamps stable quality and tone color.
Followings are some advantages of the xenon type headlamp.
q The light produced by the headlamps is white color similar to sunlight that is easy to the eyes.
q Light output is nearly double that of halogen headlamps, affording increased area of illumination.
q Retroreflected luminance increases and the contrast enhances on the wet road in the rain. That makes
visibility go up more than the increase of the light volume.
q Power consumption is approximately 25 percent less than halogen headlamps, reducing battery load.

Edition; 2004 May LT-8 2005 Q45
HEADLAMP (FOR USA)

Schematic EKS000SY

TKWM0332E

Edition; 2004 May LT-9 2005 Q45
HEADLAMP (FOR USA)

Wiring Diagram -- H/LAMP -- EKS000SZ

TKWM1465E

Edition; 2004 May LT-10 2005 Q45
HEADLAMP (FOR USA)

TKWM1466E

Edition; 2004 May LT-11 2005 Q45
HEADLAMP (FOR USA)

TKWM1467E

Edition; 2004 May LT-12 2005 Q45
HEADLAMP (FOR USA)

TKWM1468E

Edition; 2004 May LT-13 2005 Q45
HEADLAMP (FOR USA)

TKWM1469E

Edition; 2004 May LT-14 2005 Q45
HEADLAMP (FOR USA)

TKWM1470E

Edition; 2004 May LT-15 2005 Q45
HEADLAMP (FOR USA)

Terminals and Reference Values for Battery Saver Control Unit EKS000T4

Terminal Wire
Item Condition Reference value
No. color
OFF or ACC Approx. 0 V
1 W/G Ignition switch Ignition switch
ON or START Battery voltage
More than 45 seconds after igni-
Battery voltage
Ignition switch tion switch is turned OFF or ACC
(with lighting switch OFF or ACC
Headlamp relay Within 45 seconds after ignition
2 R/Y except OFF or Approx. 0 V
OUT 1 switch is turned OFF or ACC
1ST)
ON or START Approx. 0 V
Headlamps illuminate by auto light control. Approx. 0 V
1ST Approx. 2.4 V
Lighting switch
3 R/B Headlamp switch 1 PASS or 2ND Approx. 0 V
Headlamps illuminate by auto light control. Approx. 0 V
4 B Ground -- --
OFF or AUTO Battery voltage
5 L Tail lamp switch 1 lighting switch
1ST or 2ND Approx. 0 V
More than 45 seconds after igni-
Battery voltage
tion switch is turned OFF or ACC
Ignition switch OFF or ACC
Tail lamp relay (with lighting switch Within 45 seconds after ignition
6 LG/B Approx. 0 V
OUT 1 1ST or 2ND) switch is turned OFF or ACC
ON or START Approx. 0 V
Headlamps illuminate by auto light control. Approx. 0 V
Battery power sup-
7 Y/G -- Battery voltage
ply
More than 45 seconds after igni-
Battery voltage
Ignition switch tion switch is turned OFF or ACC
(with lighting switch OFF or ACC
Headlamp relay With 45 seconds after ignition
8 R/Y except OFF or Approx. 0 V
OUT 2 switch is turned OFF or ACC
1ST)
ON or START Approx. 0 V
Headlamps illuminate by auto light control. Approx. 0 V
1ST Approx. 2.4 V
Lighting switch
9 R/B Headlamp switch 2 PASS or 2ND Approx. 0 V
Headlamps illuminate by auto light control. Approx. 0 V
OFF or ACC (After more than 45 seconds with
Battery voltage
10 Y/G RAP input signal Ignition switch ignition switch turned OFF or ACC)
ON or START Approx. 0 V
11 B Ground -- --
OFF Battery voltage
13 L Tail lamp switch 2 Lighting switch
1ST or 2ND Approx. 0 V
More than 45 seconds after igni-
Battery voltage
tion switch is turned OFF or ACC
Ignition switch OFF or ACC
Tail lamp relay (with lighting switch Within 45 seconds after ignition
14 LG/B Approx. 0 V
OUT 2 1ST or 2ND) switch is turned OFF or ACC
ON or START Approx. 0 V
Headlamps illuminate by auto light control. Approx. 0 V

Edition; 2004 May LT-16 2005 Q45
HEADLAMP (FOR USA)

Terminals and Reference Values for BCM EKS000XP

A
Measuring condition
Terminal Wire
Item Ignition Reference value
No. color Operation or condition
switch B
Lighting OFF Approx. 0 V
Parking (clearance) lamp sig-
3 R/L -- switch:
nal ON Battery voltage
1ST
C
Lighting Light is applied to optical sensor. Battery voltage
5 R/Y Headlamp relay signal ON switch:
AUTO Light is not applied to optical sensor. Approx. 0 V
D
Automatic brightness adjust- Lighting Light is applied to optical sensor. Approx. 0 V
6 L/Y ON
ment signal switch: ON Light is not applied to optical sensor. Battery voltage
Lighting Light is applied to optical sensor. Battery voltage E
11 LG/B Tail lamp relay control signal ON switch:
AUTO Light is not applied to optical sensor. Approx. 0 V

Lighting AUTO Approx. 0 V
14 Y Lighting switch AUTO signal ON F
switch OFF Approx. 8 V
17 BR/Y Data link RX -- -- --
18 P Data link TX -- -- -- G
Communication signal TX
30 PU -- -- --
(BCM-AV: Transmission)
Communication signal RX
H
31 LG -- -- --
(AV-BCM: Receiving)
Passen- ON (open) Approx. 0 V
Front door switch (Passenger
37 W/G OFF ger door I
side) signal OFF (close) Battery voltage
switch
Light is applied to optical sensor. Approx. 3 V
52 G/R Optical sensor signal ON
Light is not applied to optical sensor. Approx. 0 V J
56 B Ground ON -- Approx. 0 V
58 Y/B Optical sensor ground ON -- Approx. 0 V
LT
59 SB Optical sensor power supply ON -- Approx. 5 V
60 L/OR Ignition switch (ACC) ACC -- Battery voltage
68 W/B Ignition switch (ON) ON -- Battery voltage L
105 Y/L Battery power supply OFF -- Battery voltage
113 B Ground -- -- --
M
135 W RAP output signal OFF When headlamp battery saver timer is operated. Approx. 0 V

Front door switch (driver Driver door ON (open) Approx. 0 V
142 W/R OFF
side) signal switch OFF (close) Battery voltage

Work Flow EKS0014U

1. Confirm the symptom or customer complaint.
2. Understand system description. Refer to LT-6, "System Description" .
3. Perform the preliminary check. Refer to LT-18, "Preliminary Check" .
4. Find the cause of trouble following the symptom chart and repair or replace as necessary. Refer to LT-23,
"Symptom Chart" .
5. Does the auto light system operate normally? If YES, GO TO 6. If NO, GO TO 4.
6. INSPECTION END

Edition; 2004 May LT-17 2005 Q45
HEADLAMP (FOR USA)

Preliminary Check EKS0014V

SETTING CHANGE FUNCTION FOR AUTO LIGHT SYSTEM
q Setting for each operation can be changed using CONSULT-II and a display unit.

SKIA3782E

INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSE
Check if any of the following fuses in BCM are blown.
Unit Power source Fuse No.
Battery 3
BCM Ignition switch ACC or ON 21
Ignition switch ON or START 1

Refer to LT-10, "Wiring Diagram -- H/LAMP --" .
OK or NG
OK >> GO TO 2.
NG >> If the fuse is blown be sure to eliminate cause of malfunction before installing new fuse. Refer to
PG-2, "POWER SUPPLY ROUTING" .

Edition; 2004 May LT-18 2005 Q45
HEADLAMP (FOR USA)

2. CHECK POWER SUPPLY CIRCUIT
A
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3.

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