2008 NISSAN LATIO headlamp

LT-26
< SERVICE INFORMATION >
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
• through 10A fuse [No. 3, located in fuse block (J/B)]
• to combination meter terminal 28.
With the ignition switch in the ACC or ON position, power is supplied
• through 10A fuse [No. 20, located in fuse block (J/B)]
• to BCM terminal 11.
Ground is supplied
• to BCM terminal 67 and
• to combination meter terminals 21, 22 and 23
• through grounds M57 and M61,
• to IPDM E/R terminals 39 and 59
• through grounds E15 and E24,
HEADLAMP OPERATION
Low Beam Operation
With the lighting switch in 2ND position, the BCM receives an input signal requesting the headlamps to illumi-
nate. This input signal is communicated to the IPDM E/R via the CAN communication lines. The CPU located
in the IPDM E/R controls the headlamp low relay coil, which when energized, directs power
• through 15A fuse (No. 41, located in IPDM E/R)
• through IPDM E/R terminal 54
• to daytime light relay 2 terminals 1 and 5 (energizing the relay),
• through daytime light relay 2 terminal 3
• to front combination lamp RH terminal 3, and
• through 15A fuse (No. 40, located in IPDM E/R)
• through IPDM E/R terminal 52
• to front combination lamp LH terminal 3.
Ground is supplied
• to front combination lamp LH terminal 2
• through grounds E15 and E24,
• to headlamp RH terminal 2 via
• daytime light relay 1 terminals 3 and 4
• through grounds E15 and E24.
With power and ground supplied, low beam headlamps illuminate.
High Beam/Flash-to-Pass Operation
With the lighting switch in 2ND position and high beam switch in the HIGH position, the BCM receives input
signal requesting the headlamp high beams to illuminate. The flash-to-pass feature can be used any time and
also sends a signal to the BCM. This input signal is communicated to the IPDM E/R and the combination
meter via the CAN communication lines. The CPU located in the IPDM E/R controls the headlamp high relay
coil, which when energized, directs power
• through 10A fuse (No. 34, located in IPDM E/R)
• through IPDM E/R terminal 56
• to front combination lamp RH terminal 1, and
• through 10A fuse (No. 35, located in IPDM E/R)
• through IPDM E/R terminal 55
• to front combination lamp LH terminal 1.
Ground is supplied
• to front combination lamp LH terminal 2
• through grounds E15 and E24, and
• to front combination lamp RH terminal 2 via
• daytime light relay 1 terminals 3 and 4
• through grounds E15 and E24.
With power and ground supplied, the high beam headlamps illuminate.
The BCM sends a signal to the combination meter requesting the high beam indicator lamp to turn ON.
Daytime Light System Operation
With the lighting switch in the OFF or 1ST position (parking lamps ON), the BCM receives inputs requesting
the headlights off. If the parking brake is released and the engine is running, the BCM then sends a signal, via
the CAN communication lines, requesting the IPDM E/R to activate the daytime light system. The CPU located
in the IPDM E/R controls the daytime light relay 1 coil, which when energized, directs power
• from daytime light relay 1 terminal 3
• to front combination lamp RH terminal 2,
• through front combination lamp RH high beam terminal 1

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-27
< SERVICE INFORMATION >
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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-72, "System Description" .
CAN Communication System DescriptionINFOID:0000000001704383
Refer to LAN-6, "System Description" .

LT-28
< SERVICE INFORMATION >
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Schematic
INFOID:0000000001704384
WKWA4972E

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-29
< SERVICE INFORMATION >
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Wiring Diagram - DTRL -INFOID:0000000001704385
LKWA0322E

LT-30
< SERVICE INFORMATION >
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LKWA0323E

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-31
< SERVICE INFORMATION >
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LKWA0324E

LT-32
< SERVICE INFORMATION >
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Terminal and Reference Value for BCM
INFOID:0000000001704386
Refer to BCS-11, "Terminal and Reference Value for BCM"
Terminal and Reference Value for IPDM E/RINFOID:0000000001704387
Refer to PG-23, "Terminal and Reference Value for IPDM E/R" .
LKWA0325E

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-33
< SERVICE INFORMATION >
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How to Perform Trouble DiagnosisINFOID:0000000001704388
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 normally? If YES, GO TO 6. If NO, GO TO 4.
6. INSPECTION END
Preliminary CheckINFOID:0000000001704389
CHECK BCM CONFIGURATION
1.CHECK BCM CONFIGURATION
Confirm BCM configuration for "DTRL" is set to "WITH". Refer to BCS-17, "
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-17, "
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-25, "IPDM E/R Power/Ground Circuit Inspection" .
CONSULT-III Function (BCM)INFOID:0000000001704390
Refer to LT- 11 , "CONSULT-III Function (BCM)" .
CONSULT-III Function (IPDM E/R)INFOID:0000000001704391
Refer to LT-12, "CONSULT-III Function (IPDM E/R)" .
Daytime Light Control Does Not Operate Properly (High Beam Headlamps Operate
Properly)
INFOID:0000000001704392
1.CHECK DAYTIME LIGHT RELAY 1 FUSE
Inspect daytime light relay fuse 10A fuse (No. 26, located in the fuse and fusible link box).
OK or NG
OK >> GO TO 2.
NG >> Repair harness.
2.CHECK DAYTIME LIGHT RELAY 1 POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Remove daytime light relay 1.
3. Check voltage between daytime light relay 1 harness connector
E37 terminals 2, 5 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK DAYTIME LIGHT RELAY 1
1. Apply battery voltage to daytime light relay 1 terminal 2 and supply ground to terminal 1.2, 5 - Ground : Battery voltage should exist.
WKIA3305E