2009 NISSAN LATIO light

LT-20< SERVICE INFORMATION >
HEADLAMP (FOR USA)
3. Check continuity between IPDM E/R harness connector (A) and
headlamp harness connector (B).
OK or NG OK >> Replace IPDM E/R. Refer to
PG-26, " IPDM E/R Power/
Ground Circuit Inspection " .
NG >> Repair harness or connector.
Headlamps Do Not Turn OFF INFOID:00000000043065361.
CHECK HEADLAMPS TURN OFF
Make sure that lighting switch is OFF. Make sure headlamp turns OFF when ignition switch is turned OFF.
OK or NG OK >> GO TO 3.
NG >> GO TO 2. 2.
CHECK COMBINATION SWITCH INPUT SIGNAL
1. Select “BCM” on CONSULT-III. Select “HEAD LAMP” on “SELECT TEST ITEM” screen.
2. Select “DATA MONITOR” on “SELECT DIAG MODE” screen. Make sure that “HEAD LAMP SW 1” and
“HEAD LAMP SW 2” turns ON-OFF linked with operation of lighting switch.
OK or NG OK >> Replace IPDM E/R. Refer to
PG-27, " Removal and Installation of IPDM E/R " .
NG >> Check combination switch (lighting switch). Refer to LT-63, " Combination Switch Inspection " .
3.
CHECKING CAN COMMUNICATIONS BETWEEN BCM AND IPDM E/R
Select “BCM” on CONSULT-III, and perform self-diagnosis for “BCM”.
Display of self - diagnosis results
NO DTC>> Replace IPDM E/R. Refer to
PG-27, " Removal and Installation of IPDM E/R " .
CAN COMM CIRCUIT>> Refer to LAN-8, " System Description " .
Circuit
A B
Continuity
Connector Terminal Connector Terminal
RH E47 54 E26
3 Yes
LH 52 E25 WKIA5471E
When lighting switch is OFF
position : HEAD LAMP SW 1 OFF
: HEAD LAMP SW 2 OFF

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Aiming Adjustment
INFOID:0000000004306537
PREPARATION BEFORE ADJUSTING Before performing aiming adjustment, check the following.
1. Keep all tires inflated to correct pressures.
2. Place vehicle on level surface.
3. See that there is no-load in vehicle other than the driv er (or equivalent weight placed in driver's position).
Coolant, engine oil filled up to correct level and full fuel tank, spare tire, jack and tools are properly
stowed.
LOW BEAM AND HIGH BEAM 1. Turn headlamp low beam ON.
2. Use adjusting screw to perform aiming adjustment.
3. Insert the tool through the adjusting screw acce ss hole to avoid damage to the adjusting screw.
ADJUSTMENT USING AN ADJUSTMENT SCREEN (LIGHT/DARK BORDERLINE) 1. Headlamp A. Inner and outer adjustment B. Adjusting screw access hole
C. Adjusting screw

Removal and Installation " .
3. Remove back cover.
4. Unlock retaining spring and remove bulb from headlamp.
PARKING (CLEARANCE) LAMP
1. Turn lighting switch OFF. A. Right B. Vertical center line of headlamp C. Horizontal and vertical aiming center
point of headlamp
D. Left E. Vertical aiming cutoff point F. Cutoff line for vertical aiming evalua- tion
G. Acceptable vertical cutoff setting at horizontal aiming point H. Horizontal center line of headlamp J. Maximum acceptable vertical aiming
point
K. Minimum acceptable vertical aiming point L. Aiming distance from center of head-
lamp to aiming screen

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2. Remove the headlamp. Refer to
LT-23, " Removal and Installation " .
3. Turn bulb socket counterclockwise and unlock it.
4. Remove bulb from its socket.
FRONT TURN SIGNAL LAMP 1. Turn lighting switch OFF.
2. Remove the headlamp. Refer to LT-23, " Removal and Installation " .
3. Turn bulb socket counterclockwise and unlock it.
4. Remove bulb from its socket.
Removal and Installation INFOID:0000000004306539
REMOVAL 1. Disconnect the negative battery terminal.
2. Remove front bumper fascia. Refer to EI-15 .
3. Remove headlamp bolts (A).
4. Pull headlamp (1) toward the vehicle front, disconnect connec- tor, and remove headlamp.
INSTALLATION Installation is in the reverse order of removal.
• After installation, perform aiming adjustment. Refer to LT-21, " Aiming Adjustment " .
Disassembly and Assembly INFOID:0000000004306540 WKIA5418E

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HEADLAMP (FOR CANADA)
- DAYTIME LIGHT SYSTEM -
Component Parts and Har ness Connector Location INFOID:0000000004306541
System Description INFOID:0000000004306542
Headlamp operation is controlled by the BCM (body c ontrol module) based on inputs from the combination
switch (lighting switch). When the lighting switch is pl aced in the 2ND position, the BCM receives an input sig-
nal requesting the headlamps (and tail lamps) illuminate. The request is then communicated to the IPDM E/R
(intelligent power distribution module engine room) vi a the CAN communication lines. The CPU (central pro-
cessing unit) located in the IPDM E/R controls ground for the headlamp high and headlamp low relay coils.
These relays direct power to the respective headlamps , which then illuminate. When the headlamp switch is
OFF or in the 1ST position (parking lamps ON), the parking brake is released and the engine is running, the
IPDM E/R de-energizes the headlamp relays and supplies gr ound to the daytime light relay 1 to actuate the
daytime light function.
OUTLINE Power is supplied at all times
• to headlamp high relay RH and LH (located in IPDM E/R)
• to headlamp low relay (located in IPDM E/R) and
• to ignition relay (located in IPDM E/R)
• through 15A fuse (No. 52, located in IPDM E/R) and
• through 20A fuse (No. 53, located in IPDM E/R)
• to CPU located in IPDM E/R,
• through 40A fusible link (letter g , located in fuse and fusible link box)
• to BCM terminal 70,
• through 10A fuse [No. 8, located in fuse block (J/B)]
• to BCM terminal 57,
• through 10A fuse [No. 13, located in fuse block (J/B)]
• to combination meter terminal 27,
• through 10A fuse (No. 26, located in fuse and fusible link box)
• to the daytime light relay 1.
With the ignition switch in the ON or START position, power is supplied
• to the ignition relay (located in IPDM E/R),
• through 10A fuse [No. 6, located in fuse block (J/B)]
• to BCM terminal 38, 1. IPDM E/R E43, E46, E47 and E48 2. BCM M18 and M20 (view with glove
box removed)3. Combination switch (lighting switch)
M28
4. Combination meter M24 5. Daytime light relay 1 E37 and day- time light relay 2 E386. Parking brake switch M17

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• to IPDM E/R terminal 56,
• through 10A fuse (No. 34, located in IPDM E/R) and
• through both de-energized headlamp high relays
• to 10A fuse (No. 35, located in IPDM E/R),
• through IPDM E/R terminal 55
• to front combination lamp LH terminal high beam 1.
Ground is supplied
• to front combination lamp LH terminal 2
• through grounds E15 and E24,
• to daytime light relay 1 terminal 1
• through IPDM E/R terminal 6.
With power and ground supplied, high beam headlamps illuminate at reduced intensity.
COMBINATION SWITCH READING FUNCTION Refer to BCS-3, " System Description " .
EXTERIOR LAMP BATTERY SAVER CONTROL Refer to LT-73, " System Description " .
CAN Communication System Description INFOID:0000000004306543
Refer to LAN-8, " System Description " .

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How to Perform Trouble Diagnosis
INFOID:0000000004306548
1. Confirm the symptom or customer complaint.
2. Understand operation, description and function description. Refer to LT-25, " System Description " .
3. Perform the Preliminary Check. Refer to LT-33, " Preliminary Check " .
4. Check symptom and repair or replace the cause of the malfunction.
5. Does the daytime light system operate norma lly? If YES, GO TO 6. If NO, GO TO 4.
6. INSPECTION END
Preliminary Check INFOID:0000000004306549
CHECK BCM CONFIGURATION Configuration " .
OK or NG OK >> Continue preliminary check. Refer to
BCS-15, " BCM Power Supply and Ground Circuit Inspec-
tion " .
NG >> Change BCM configuration for "DTRL" to "WITH". Refer to BCS-18, " Configuration " .
CHECK POWER SUPPLY AND GROUND CIRCUIT FOR BCM Refer to BCS-15, " BCM Power Supply and Ground Circuit Inspection " .
CHECK POWER SUPPLY AND GROUND CIRCUIT FOR IPDM E/R Refer to PG-26, " IPDM E/R Power/Ground Circuit Inspection " .
CONSULT-III Function (BCM) INFOID:0000000004306550
Refer to LT-11, " CONSULT-III Function (BCM) " .
CONSULT-III Function (IPDM E/R) INFOID:0000000004306551
Refer to LT-12, " CONSULT-III Function (IPDM E/R) " .
Daytime Light Control Does Not Operate Properly (High Beam Headlamps Operate
Properly) INFOID:0000000004306552OK >> GO TO 2.
NG >> Repair harness. OK >> GO TO 3.
NG >> Repair harness or connector.

OK >> GO TO 4.
NG >> Replace daytime light relay 1. OK >> GO TO 6.
NG >> GO TO 5. NO DTC>>Replace BCM. Refer to
BCS-18, " Removal and Installation of BCM " .
CAN COMM CIRCUIT>> Check BCM CAN communication system. Refer to LAN-17, " Trouble Diagnosis
Flow Chart " .
OK >> Replace the IPDM E/R. Refer to
PG-27, " Removal and
Installation of IPDM E/R " .
NG >> Repair harness or connector. 3 - 5 : Continuity should exist.