2008 NISSAN LATIO service

LT-38
< SERVICE INFORMATION >
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
DISASSEMBLY
1. Remove back cover.
2. Unlock retaining spring and remove bulb (High/Low).
3. Turn parking (clearance) lamp bulb socket counterclockwise and unlock it.
4. Remove parking (clearance) lamp bulb from its socket.
5. Turn front turn signal lamp bulb socket counterclockwise and unlock it.
6. Remove front turn signal lamp bulb from its socket.
7. Remove the bumper stay.
ASSEMBLY
Assembly is in the reverse order of disassembly.
CAUTION:
• After installing bulb, be sure to install plastic cap securely to insure water tight seal.
1. Retaining spring 2. Parking (clearance) lamp bulb 3. Parking (clearance) lamp bulb socket
4. Halogen bulb (High/Low) 5. Back cover 6. Front turn signal lamp bulb socket
7. Front turn signal lamp bulb 8. Headlamp housing assembly 9. Bumper stay
A. Screw

FRONT FOG LAMP
LT-39
< SERVICE INFORMATION >
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FRONT FOG LAMP
Component Parts and Harness Connector LocationINFOID:0000000001704397
System DescriptionINFOID:0000000001704398
The front fog lamps are controlled by lighting switch inputs to the BCM (body control module). The lighting
switch must be in the 1ST or 2ND position with the high beams OFF before the BCM will request the IPDM E/
R (intelligent power distribution module engine room) to turn the front fog lamps on. The BCM requests the
front fog lamps over the CAN communication lines to the IPDM E/R. The CPU (central processing unit) of the
IPDM E/R controls the front fog lamp relay coil ground. When energized, the relay directs power to the front
fog lamps.
OUTLINE
Power is supplied at all times:
• to front fog lamp relay (located in IPDM E/R),
• 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 the 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.
With the ignition switch in the ON or START position, power is supplied:
• to ignition relay (located in IPDM E/R),
• through 10A fuse [No. 6, located in fuse block (J/B)]
• to BCM terminal 38.
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
• through grounds M57 and M61,
• to IPDM E/R terminals 39 and 59
• through grounds E15 and E24.
FOG LAMP OPERATION
The front fog lamp switch is built into the lighting switch. The lighting switch must be in 1ST position or 2ND
position and front fog lamp switch must be ON position for front fog lamp operation. The fog lamp will not oper-
ate with the high beam headlamps ON.
When the front fog lamp switch is in the ON position, the BCM sends a request, via the CAN communication
lines, to the CPU of the IPDM E/R to ground the coil side of the front fog lamp relay. The front fog lamp relay
then directs power
• through 15A fuse (No. 56, located in IPDM E/R)
1. IPDM E/R E46, E47 and E48 2. BCM M18 and M20 (viewed with
glove box removed)3. Combination switch (lighting switch)
M28
WKIA5554E

LT-40
< SERVICE INFORMATION >
FRONT FOG LAMP
• through IPDM E/R terminal 50
• to front fog lamp LH terminal 1, and
• through IPDM E/R terminal 51
• to front fog lamp RH terminal 1.
Ground is supplied
• to front fog lamp terminal 2,
• through grounds E15 and E24.
With power and grounds supplied, front fog lamps illuminate.
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:0000000001704399
Refer to LAN-6, "System Description" .

FRONT FOG LAMP
LT-41
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Wiring Diagram - F/FOG -INFOID:0000000001704400
LKWA0326E

LT-42
< SERVICE INFORMATION >
FRONT FOG LAMP
Terminal and Reference Value for BCM
INFOID:0000000001704401
Refer to BCS-11, "Terminal and Reference Value for BCM" .
Terminal and Reference Value for IPDM E/RINFOID:0000000001704402
Refer to PG-23, "Terminal and Reference Value for IPDM E/R" .
LKWA0327E

FRONT FOG LAMP
LT-43
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How to Proceed with Trouble DiagnosisINFOID:0000000001704403
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT-39, "
System Description" .
3. Perform the Preliminary Check. Refer to LT-43, "
Preliminary Check" .
4. Check symptom and repair or replace the cause of the malfunction.
5. Do the front fog lamps operate normally? If YES, GO TO 6. If NO, GO TO 4.
6. INSPECTION END.
Preliminary CheckINFOID:0000000001704404
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:0000000001704405
Refer to BCS-16, "CONSULT-III Function (BCM)" .
CONSULT-III Function (IPDM E/R)INFOID:0000000001704406
Refer to PG-17, "CONSULT-III Function (IPDM E/R)" .
Front Fog lamps Do Not Illuminate (Both Sides)INFOID:0000000001704407
1.INSPECT FOG LAMP FUSE
Inspect fog lamp 15A fuse No. 56 in IPDM E/R.
OK or NG
OK >> GO TO 2.
NG >> Repair harness.
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 “FR FOG SW” turns ON-
OFF linked with operation of fog lamp switch.
With CONSULT-III
Select “BCM” on CONSULT-III. With “HEAD LAMP” data monitor, make sure “FR FOG SW” turns ON-OFF
linked with operation of front fog lamp switch.
Without CONSULT-III
Refer to LT-63, "
Combination Switch Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Check combination switch (lighting switch). Refer to LT-63, "
Combination Switch Inspection" .
3.FOG LAMP ACTIVE TEST
With CONSULT-III
1. Select “IPDM E/R” on CONSULT-III. Select “ACTIVE TEST” on “SELECT DIAG MODE” screen.
2. Select “EXTERNAL LAMPS” on “SELECT TEST ITEM” screen.
3. Touch “FOG” screen.
4. Make sure front fog lamp operates.
Without CONSULT-IIIWhen fog lamp switch is ON : FR FOG SW ON
Front fog lamp should operate.

LT-44
< SERVICE INFORMATION >
FRONT FOG LAMP
1. Start auto active test. Refer to PG-19, "Auto Active Test" .
2. Make sure front fog lamp operates.
OK or NG
OK >> GO TO 4.
NG >> GO TO 5.
4.CHECK IPDM E/R
1. Select “IPDM E/R” on CONSULT-III. Select “DATA MONITOR” on “SELECT DIAG MODE” screen.
2. Make sure “FR FOG REQ” turns ON when front fog lamp switch is in ON position.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-26, "Removal and Installation of IPDM E/R" .
NG >> Replace BCM. Refer toBCS-18, "
Removal and Installation of BCM" .
5.CHECK FOG LAMP INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect front fog lamp connector.
3. Select “IPDM E/R” on CONSULT-III, and select “ACTIVE TEST” on “SELECT DIAG MODE” screen.
4. Select “EXTERNAL LAMPS” on “SELECT TEST ITEM” screen.
5. Touch “FOG” screen.
6. When front fog lamp relay is operating, check voltage between
front fog lamp harness connector and ground.
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect front fog lamp connector.
3. Start auto active test. Refer to PG-19, "
Auto Active Test" .
4. When front fog lamp relay is operating, check voltage between front fog lamp harness connector and
ground.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6.CHECK FOG LAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.Front fog lamp should operate.
When front fog lamp switch
is ON position: FR FOG REQ ON
(+)
(−) Voltage
Front fog lamp connector Terminal
RH E28
1 Ground Battery voltage
LH E27
(+)
(−) Voltage
Front fog lamp connector Terminal
RH E28
1 Ground Battery voltage
LH E27
PKIA6276E

FRONT FOG LAMP
LT-45
< SERVICE INFORMATION >
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3. Check continuity between IPDM E/R harness connector (A) and
front fog lamp harness connector (B).
OK or NG
OK >> Replace IPDM E/R. Refer to PG-26, "Removal and
Installation of IPDM E/R" .
NG >> Repair harness or connector.
7.CHECK FOG LAMP GROUND
1. Check continuity between front fog lamp harness connector and
ground.
OK or NG
OK >> Check front fog lamp bulbs.
NG >> Repair harness or connector.
Front Fog Lamp Does Not Illuminate (One Side)INFOID:0000000001704408
1. CHECK BULB
Check bulb of lamp which does not illuminate.
OK or NG
OK >> GO TO 2.
NG >> Replace front fog lamp bulb.
2.CHECK FOG LAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and front fog lamp connector.
3. Check continuity between IPDM E/R harness connector (A) and
front fog lamp harness connector (B).
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK FOG LAMP GROUND
CircuitAB
Continuity
Connector Terminal Connector Terminal
RH
E4751 E28
1Yes
LH 50 E27
WKIA4408E
Front fog lamp connector Terminal
Ground Continuity
RH E28
2Yes
LH E27
PKIA6277E
CircuitAB
Continuity
Connector Terminal Connector Terminal
RH
E4751 E28
1Yes
LH 50 E27
WKIA4408E