2008 NISSAN LATIO ignition

LT-16
< SERVICE INFORMATION >
HEADLAMP (FOR USA)
4. Check voltage between headlamp harness connector and
ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 5.
4.CHECK HEADLAMP GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between headlamp harness connector and
ground.
OK or NG
OK >> Check connecting condition headlamp harness connec-
tor.
NG >> Repair harness or connector.
5.CHECK HEADLAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
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, "Removal and
Installation of IPDM E/R" .
NG >> Repair harness or connector.
High Beam Indicator Lamp Does Not IlluminateINFOID:0000000001704373
1.BULB INSPECTION
Inspect CAN communication system. Refer to LAN-6
.
OK or NG
OK >> Replace combination meter. Refer to DI-20, "Removal and Installation" .
NG >> Repair as necessary.
Headlamp Low Beam Does Not Illuminate (Both Sides)INFOID:0000000001704374
1.CHECK COMBINATION SWITCH INPUT SIGNAL
With CONSULT-III
1. Select “BCM” on CONSULT-III. Select “HEAD LAMP” on “SELECT TEST ITEM” screen.
Te r m i n a l
Voltag e (+)
(−)
Headlamp connector Terminal
RH E26
1 Ground Battery voltage
LH E25
WKIA5552E
Headlamp connector Terminal
Ground Continuity
RH E26
2Yes
LH E25
PKIC0961E
CircuitAB
Continuity
Connector Terminal Connector Terminal
RH
E47 56 E26
1Yes
LH 55 E25
WKIA5470E

HEADLAMP (FOR USA)
LT-17
< SERVICE INFORMATION >
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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.
Without CONSULT-III
Refer to LT-63, "
Combination Switch Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Check combination switch (lighting switch). Refer to LT-63, "
Combination Switch Inspection" .
2.CHECK HEADLAMP 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 “LO” screen.
4. Make sure headlamp low beam operates.
Without CONSULT-III
1. Start auto active test. Refer to PG-19, "
Auto Active Test" .
2. Make sure headlamp low beam operates.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
3.CHECK IPDM E/R
1. Select “IPDM E/R” on CONSULT-III. Select “DATA MONITOR” on “SELECT DIAG MODE” screen.
2. Make sure “HL LO REQ” turns ON when lighting switch is in 2ND 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" .
4.HEADLAMP LOW BEAM FUSE INSPECTION
Inspect 15A fuse No. 40 (LH) and fuse No. 41 (RH).
OK or NG
OK >> GO TO 5.
NG >> Repair harness.
5.BULB INSPECTION
Inspect inoperative headlamp bulbs.
OK or NG
OK >> GO TO 6.
NG >> Replace headlamp bulb.LT-22, "
Bulb Replacement" .
6.CHECK HEADLAMP INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect headlamp connector.
3. Select “IPDM E/R” on CONSULT-III. Select “ACTIVE TEST” on “SELECT DIAG MODE” screen.
4. Select “EXTERNAL LAMPS” on “SELECT TEST ITEM” screen. When lighting switch is 2ND
position: HEAD LAMP SW 1 ON
: HEAD LAMP SW 2 ON
Headlamp low beam should operate.
Headlamp low beam should operate.
When lighting switch is 2ND
position: HL LO REQ ON

LT-18
< SERVICE INFORMATION >
HEADLAMP (FOR USA)
5. Touch “LO” screen.
6. When headlamp low beam is operating, check voltage between
headlamp harness connector and ground.
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect headlamp connector.
3. Start auto active test. Refer to PG-19, "
Auto Active Test" .
4. When headlamp low beam is operating, check voltage between headlamp harness connector and ground.
OK or NG
OK >> GO TO 7.
NG >> GO TO 8.
7.CHECK HEADLAMP GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between headlamp harness connector (B) and
ground.
OK or NG
OK >> Check front combination lamp connector for damage or
poor connection. Repair as necessary.
NG >> Repair harness.
8.CHECK HEADLAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
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, "Removal and
Installation of IPDM E/R" .
NG >> Repair harness or connector.
Te r m i n a l
Vo l ta g e (+)
(−)
Headlamp connector Terminal
RH E26
3 Ground Battery voltage
LH E25
Te r m i n a l
Vo l ta g e (+)
(−)
Headlamp connector Terminal
RH E26
3 Ground Battery voltage
LH E25
PKIC0963E
Headlamp connector Terminal
Ground Continuity
RH E26
2Yes
LH E25
PKIC0961E
CircuitAB
Continuity
Connector Terminal Connector Terminal
RH
E4754 E26
3Yes
LH 52 E25
WKIA5471E

HEADLAMP (FOR USA)
LT-19
< SERVICE INFORMATION >
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Headlamp Low Beam Does Not Illuminate (One Side)INFOID:0000000001704375
1.HEADLAMP LOW BEAM FUSE INSPECTION
Inspect 15A fuse No. 40 (LH) and fuse No. 41 (RH).
OK or NG
OK >> GO TO 2.
NG >> Repair harness.
2.CHECK BULB
Check bulb of headlamp which does not illuminate.
OK or NG
OK >> GO TO 3.
NG >> Replace bulb. Refer to LT-22, "
Bulb Replacement" .
3.CHECK HEADLAMP INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect headlamp connector.
3. Lighting switch is turned to 2ND position.
4. Check voltage between headlamp harness connector and
ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 5.
4.CHECK HEADLAMP GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between headlamp harness connector and
ground.
OK or NG
OK >> Check condition of headlamp harness connector.
NG >> Repair harness or connector.
5.CHECK HEADLAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
Te r m i n a l
Vo l ta g e (+)
(−)
Headlamp connector Terminal
RH E26
3 Ground Battery voltage
LH E25
WKIA5551E
Headlamp connector Terminal
Ground Continuity
RH E26
2Yes
LH E25
PKIC0961E

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-25, "IPDM E/R Power/
Ground Circuit Inspection" .
NG >> Repair harness or connector.
Headlamps Do Not Turn OFFINFOID:0000000001704376
1.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-26, "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-26, "Removal and Installation of IPDM E/R".
CAN COMM CIRCUIT>> Refer to LAN-6, "
System Description".
CircuitAB
Continuity
Connector Terminal Connector Terminal
RH
E4754 E26
3Yes
LH 52 E25
WKIA5471E
When lighting switch is OFF
position: HEAD LAMP SW 1 OFF
: HEAD LAMP SW 2 OFF

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-25
< SERVICE INFORMATION >
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Component Parts and Harness Connector LocationINFOID:0000000001704381
System DescriptionINFOID:0000000001704382
Headlamp operation is controlled by the BCM (body control module) based on inputs from the combination
switch (lighting switch). When the lighting switch is placed 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) via 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 ground 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
WKIA5555E

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-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