2008 NISSAN LATIO ignition

REMOTE KEYLESS ENTRY SYSTEM
BL-67
< SERVICE INFORMATION >
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OK or NG
OK >> Key switch circuit is OK.
NG >> GO TO 2.
2.CHECK KEY SWITCH
1. Turn ignition switch OFF.
2. Disconnect key switch and key lock solenoid connector.
3. Check key switch.
OK or NG
OK >> Check the following.
• 10A fuse [No. 14, located in fuse block (J/B)]
• Harness for open or short between key switch and
fuse
• Harness for open or short between BCM and key
switch
NG >> Replace key switch and key lock solenoid.
Hazard Function CheckINFOID:0000000001703989
1.CHECK HAZARD WARNING LAMP
Does hazard warning lamp flash with hazard switch?
OK or NG
OK >> Hazard warning lamp circuit is OK.
NG >> Check hazard circuit. Refer to LT- 4 8
.
Horn Function CheckINFOID:0000000001703990
First perform the “SELF-DIAG RESULTS” in “BCM” with CONSULT-III, then perform the trouble diagnosis of
malfunction system indicated “SELF-DIAG RESULTS” of “BCM”. Refer to BCS-17, "
CAN Communication
Inspection Using CONSULT-III (Self-Diagnosis)" .
1.CHECK HORN FUNCTION
Does horn sound with horn switch?
OK or NG
OK >> GO TO 2.
NG >> Check horn circuit. Refer to WW-37
.
2.CHECK IPDM E/R INPUT SIGNAL
Check voltage between IPDM E/R connector and ground.
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
( + ) ( – )
M18 37 GroundKey is inserted. Battery voltage
Key is removed. 0
LIIA0567E
Terminals Condition Continuity
1 – 2Key is inserted. Yes
Key is removed. No
PIIB6411E

BL-68
< SERVICE INFORMATION >
REMOTE KEYLESS ENTRY SYSTEM
OK or NG
OK >> Replace IPDM E/R. Refer to PG-26, "Removal and
Installation of IPDM E/R"
NG >> GO TO 3.
3.CHECK HORN RELAY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R and horn relay connector.
3. Check continuity between IPDM E/R harness connector and
horn relay harness connector.
4. Check continuity between IPDM E/R harness connector and
ground.
OK or NG
OK >> Check condition of harness and connector.
NG >> Repair or replace harness.
Interior Lamp and Ignition Keyhole Illumination Function CheckINFOID:0000000001703991
1.CHECK INTERIOR LAMP AND IGNITION KEYHOLE ILLUMINATION FUNCTION
When map lamp switch is in “DOOR” position, open the front door (LH or RH).
Does interior lamp illuminate?
YES >> Replace BCM. Refer to BCS-18, "Removal and Installation of BCM" .
NO >> Check interior lamp circuit. Refer to LT- 8 9
.
Remote Keyless Entry Receiver CheckINFOID:0000000001703992
1.CHECK REMOTE KEYLESS ENTRY RECEIVER OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Check remote keyless entry receiver connector and ground signal with oscilloscope.
Te r m i n a l s
Voltage (V)
(Approx.) (+)
(–)
IPDM E/R connector Terminal
E46 45 Ground Battery voltage
WIIA1251E
AB
Continuity
IPDM E/R
connectorTe r m i n a lHorn relay
connectorTe r m i n a l
E46 45 H-1 1 Yes
A
GroundContinuity
IPDM E/R connector Terminal
E46 45 No
WIIA1252E

INTELLIGENT KEY SYSTEM
BL-75
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1. Horn (Low) E18, E20
(view with front fascia removed)2. Horn (High) E21, E22 3. Horn relay H-1
4. Instrument panel antenna M10
(view with glove box removed)5. BCM M18, M19, M20 6. Intelligent Key Unit M52
7. Combination meter M24 8. Intelligent key "KEY" warning indicator 9a.
9b.Intelligent key warning indicator (CVT)
Intelligent key warning indicator (M/T)
10. Stop lamp switch E13 11. Steering lock solenoid M6
(bottom view of steering column)12. Key switch and ignition knob switch
M73
13. CVT device (park position switch)
M3814. Intelligent key warning buzzer (front door
LH) D6
(view with front door finisher LH removed)15. Front outside antenna LH D10, RH
D106
16. Front door request switch LH D5,
RH D10317. Front door lock actuator LH (door unlock
sensor) D318. Front door switch LH B8, RH B108
19. Rear door switch LH B6, RH B116 20. Front console antenna B3
(view with front console removed)21. Rear floor antenna B12
(behind rear seat)
22. Trunk opener request switch B129
(sedan)23. Back door request switch D406
(hatchback)24. Back door lock assembly (back door
switch) D405 (hatchback view with
back door open)
25. Rear bumper antenna B2
(view with rear fascia removed)26. Intelligent Key warning buzzer (trunk) B32
(sedan)
LIIA2917E

BL-76
< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
System Description
INFOID:0000000001703999
• The Intelligent Key system is a system that makes it possible to lock and unlock the door locks (door lock/
unlock function), and start the engine (engine start function) by carrying around the Intelligent Key (without
some key operation), which operates based on the results of electronic ID verification using two-way com-
munications between the Intelligent Key and the vehicle (Intelligent Key unit).
• Vehicles equipped with a manual transmission include a key interlock solenoid located in the steering col-
umn to prevent accidental shut-off of the ignition switch and locking of the steering wheel during driving con-
dition when the vehicle is moving.
CAUTION:
The driver should always carry the Intelligent Key
• Operation of the remote controller buttons on the Intelligent Key also provides the same functions as the
remote control entry system. (Remote keyless entry functions)
• If an action that does not meet the operating conditions of the Intelligent Key system is taken, the buzzer
goes off to inform the driver. (Warning chime functions)
• When a door lock is locked or unlocked with request switch or remote controller button operation, the hazard
lamps flash and the buzzer (outside vehicle) sounds (Hazard and buzzer reminder function).
• Even if the Intelligent Key battery is completely discharged, the door locks can be locked and unlocked and
the engine started with the mechanical key built into the Intelligent Key.
• The settings for each function can be changed with the CONSULT-III.
• If an Intelligent Key is lost, a new Intelligent Key can be registered. A maximum of 4 Intelligent Keys can be
registered.
• It has been made possible to diagnose the system and register an Intelligent Key with the CONSULT-III.
DOOR LOCK/UNLOCK FUNCTION
Only when pressing the request switch, it is possible to lock and unlock the door by carrying around the Intelli-
gent Key (without some key operation).
System Diagram
Operation Description
• When the Intelligent Key unit detects that each request switch is pressed, it starts the outside key antenna
and inside key antenna corresponding to the pressed request switch and sends the request signal to the
Intelligent Key. And then, make sure that the Intelligent Key is near door.
• If the Intelligent Key is within the outside key antenna detection area, it receives the request signal and
sends the key ID signal to the Intelligent Key unit.
• Intelligent Key unit receives the key ID signal and compares it with the registered key ID.
• If the key ID check result is OK, the Intelligent Key unit sends the door lock/unlock request signal to BCM
(Body control module) via CAN communication line.
• Intelligent Key unit sends the door lock/unlock signal and sounds Intelligent Key warning buzzer (lock: 2
times, unlock: 1 time) at the same time.
• When BCM receives the door lock/unlock signal, it operates door lock actuator and flashes the hazard warn-
ing lamp (lock: 2 times, unlock: 1 time) at the same time as reminder.
Operation Condition
If the following conditions are not satisfied, door lock/unlock operations are not performed even if the request
switch is operated.
LIIA2926E

INTELLIGENT KEY SYSTEM
BL-77
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*: Even with a registered Intelligent Key remaining inside the vehicle, door locks can be unlocked from outside of the vehicle with a spare
Intelligent Key as long as Key IDs are different.
Outside Key Antenna Detection Area
The outside key antenna detection area of door lock/unlock function is in the range of approximately 80 cm
(31.50 in) surrounding the request switch (driver side, passenger side and back door or trunk area).
Hazard and Buzzer Reminder
When all doors and trunk (sedan) are locked or unlocked by each request switch, Intelligent Key unit sends
hazard request signal to BCM via CAN communication line.
BCM flashes hazard warning lamps as a reminder and Intelligent Key unit sounds Intelligent Key warning
buzzer(s) as a reminder.
Operating function of hazard and buzzer reminder
* : Sedan only
Auto Door Lock Function
When all doors and trunk (sedan) are locked, ignition knob switch is OFF (when ignition switch is not pressed)
and key switch is OFF (when mechanical key is out of ignition key cylinder), all doors are unlocked with each
request switch.
When Intelligent Key unit does not receive the following signals within 1 minute, all doors are locked.
• Door switch is ON (door is opened)
• Trunk lamp switch (sedan) is ON (trunk is opened)
• Door lock signal from Intelligent Key button
• Ignition knob switch is ON (ignition switch is pressed)
• Key switch is ON (mechanical key is inserted in ignition key cylinder)
Auto door lock mode can be changed by “AUTO RELOCK TIMER” mode in “WORK SUPPORT”. Refer to BL-
101, "CONSULT-III Application Item".
List of Operation Related Parts
Parts marked with × are the parts related to operation.
Each request switch operation Operation condition Operation
Lock operation• All doors and trunk (sedan) are closed
• Intelligent Key is outside of the vehicle
• Intelligent Key is within outside key antenna detection areaAll doors lock
Unlock Operation• All doors and trunk (sedan) are closed
• Intelligent Key is outside of the vehicle
• Intelligent Key is within outside key antenna detection area*All doors unlock
Request switch operation Hazard warning lamp flashIntelligent Key warning buzzer (front door LH)
Intelligent Key warning buzzer (trunk)*
Unlock Once Once
Lock Twice Twice

BL-78
< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
* : Hatchback
** : Sedan
KEY REMINDER FUNCTION
Key reminder functions have the following 2 functions.
CAUTION:
• The above function operates when the Intelligent Key is inside the vehicle. However, there may be
times when the Intelligent Key cannot be detected, and this function will not operate when the Intelli-
gent Key is on the instrument panel, rear parcel shelf or in the glove box. Also, this system some-
times does not operate if the Intelligent Key is in the door pocket of an open door.
List of Operation Related Parts
Parts marked with × are the parts related to operation
REMOTE KEYLESS ENTRY FUNCTIONS
The Intelligent Key has the same functions as the remote keyless entry system. Therefore, it can be used in
the same manner as the keyfob by operating the door lock/unlock button.
Door lock open function
Intelligent Key
Key switch
Ignition knob switch
Door switch
Back door lock assembly (back door switch)
*
Request switch (driver, passenger, back)
Door lock actuator
Inside key antenna
Outside key antenna
Intelligent Key warning buzzer (front door LH)
Intelligent Key warning buzzer (trunk)
**
Intelligent Key unit
CAN communication system
BCM
Hazard warning lamp
Door lock/unlock function by request switch××××××××××
Door lock/unlock function by mechanical key××
Hazard and buzzer reminder function××××××
Auto door lock function×××× × ×××
Key reminder function Operation condition Operation
Door is open to closeRight after all doors are closed under the following conditions.
• Intelligent Key is inside the vehicle
• Any door is opened
• All doors are locked by door lock and unlock switch or door
lock knob• All doors unlock operation
• Sound Intelligent Key warn-
ing buzzer for 3 seconds
Key reminder functions
Intelligent Key
Door switch
Unlock sensor
Door lock actuator
Inside key antenna
Intelligent Key warning buzzer(s)
Intelligent Key unit
CAN communication system
BCM
Any door open to close×××××××××

INTELLIGENT KEY SYSTEM
BL-79
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P System Diagram
Door Lock/Unlock Function
• When door lock/unlock button of the Intelligent Key is pressed, lock signal or unlock signal is sent from Intel-
ligent Key to Intelligent Key unit.
• Intelligent Key unit sends the door lock/unlock request signal to BCM via CAN communication line.
• Intelligent Key unit sends the door lock/unlock signal and sounds Intelligent Key warning buzzer(s)
(lock: 2 times, unlock: 1 time) at the same time.
• When BCM receives the door lock/unlock signal, it operates door lock actuator and flashes the hazard warn-
ing lamp (lock: 2 times, unlock: 1 time) at the same time as reminder.
Operation Condition
Hazard and Buzzer Reminder
When all doors are locked or unlocked by Intelligent Key button, Intelligent Key unit sends hazard request sig-
nal to BCM via CAN communication line.
BCM flashes hazard warning lamps as a reminder and Intelligent Key unit sounds Intelligent Key warning
buzzer as a reminder.
Operating function of hazard and buzzer reminder
Auto Door Lock Function
When all doors are locked, ignition knob switch is OFF (when ignition switch is not pressed) and key switch is
OFF (when mechanical key is out of ignition key cylinder), doors are unlocked with Intelligent Key button.
When Intelligent Key unit does not receive the following signals within 1 minute, all doors are locked.
• Door switch is ON (door is opened)
• Trunk lamp switch (sedan) is ON (trunk is opened)
• Door is locked
• Ignition knob switch is ON (ignition switch is pressed)
• Key switch is ON (mechanical key is inserted in ignition switch)
Auto door lock mode can be changed by “AUTO RELOCK TIMER” mode in “WORK SUPPORT”. Refer to BL-
101, "CONSULT-III Application Item".
Panic Alarm Function
When ignition knob switch is OFF (ignition switch is not pressed), or key switch is OFF (mechanical key is not
inserted in key cylinder), pressing and holding the panic alarm button on Intelligent Key will send a panic alarm
signal to Intelligent Key unit.
Intelligent Key unit sends alarm request signal to BCM via CAN communication line.
LIIA2927E
Remote controller operation Operation condition Operation
Lock All doors are closed All doors lock
Intelligent Key button operation Hazard warning lamp flash Intelligent Key warning buzzer(s)Horns
(High and low)
Lock Twice — Once
Unlock Once — —

BL-80
< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
BCM sends headlamp request signal and horn signal to IPDM E/R. Then, IPDM E/R turns on and off head-
lamp and horn intermittently.
The headlamp flashes and the horn sounds intermittently.
The alarm automatically turns off:
• After 25 seconds
• When Intelligent Key unit receives any signal from remote controller of Intelligent Key
• When door request switch is pressed (Intelligent Key is outside vehicle)
Panic alarm function's press and holding time value can be changed in “PANIC ALARM DELAY” mode in
“WORK SUPPORT”. Refer to BL-101, "
CONSULT-III Application Item".
List of Operation Related Parts
Parts marked with × are the parts related to operation.
ENGINE START FUNCTION
When the registered Intelligent Key is carried, the engine can be started without inserting the key.
When ignition knob switch is ON (press ignition switch), Intelligent Key unit searches Intelligent Key in the
vehicle using inside key antenna.
Then Intelligent Key is inside the vehicle, it performs the following operation.
• Illuminate green “KEY” warning lamp in combination meter.
• Released steering lock and ignition switch can be turned from OFF to ACC, ON or START position.
NOTE:
If Intelligent Key is not registered, “KEY” warning lamp in combination meter illuminates red.
• Intelligent Key sends engine start signal to BCM via CAN communication line.
Remote keyless entry functions
Intelligent Key
Key switch
Ignition knob switch
Door request switch
Door switch
Back door lock assembly (back door switch)
Door lock actuator
Intelligent Key warning buzzer
Intelligent Key unit
CAN communication system
BCM
Hazard warning lamp
Horn
IPDM E/R
Head lamp
Door lock/unlock function by Intelligent Key button×××××××
Hazard and buzzer reminder function×××××
Auto door lock function×× ××× ×××
Panic alarm function×××× ××× ×××
WIIA1282E