2008 NISSAN LATIO ignition

BL-202
< SERVICE INFORMATION >
VEHICLE SECURITY (THEFT WARNING) SYSTEM
BACK DOOR
Check continuity between back door lock assembly connector (back
door switch) terminals 3 and 4 while pressing (closing back door)
and releasing (opening back door) switch.
OK or NG
OK1 >> (Front and rear doors) Switch circuit is OK.
OK2 >> (Back door) GO TO 4.
NG >> Replace door switch.
4.CHECK BACK DOOR SWITCH GROUND
Check continuity between back door lock assembly connector D405
terminal 4 and ground.
OK or NG
OK1 >> Back door switch circuit is OK (without Intelligent Key).
OK2 >> GO TO 5 (with Intelligent Key).
NG >> Repair or replace harness.
5.CHECK BACK DOOR SWITCH SIGNAL FOR SHORT
1. Disconnect Intelligent Key unit.
2. Check continuity between BCM connector M18 terminal 30 and ground.
OK or NG
OK >> Back door switch circuit is OK.
NG >> Repair or replace harness.
6.CHECK BACK DOOR SWITCH SIGNAL FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit and BCM.
3. Check continuity between Intelligent Key unit connector M52 (A) terminal 23 and BCM connector M18 (B)
terminal 30.When back door is open : Continuity should exist.
When back door is closed : Continuity should not exist.
WIIA1245E
4 - Ground : Continuity should exist.
WIIA1246E
30 - Ground : Continuity should not exist.
WIIA1299E

VEHICLE SECURITY (THEFT WARNING) SYSTEM
BL-203
< SERVICE INFORMATION >
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OK or NG
OK >> Door switch circuit is OK.
NG >> Repair or replace harness.
Diagnosis Procedure 2INFOID:0000000001704095
SECURITY INDICATOR LAMP CHECK
1.SECURITY INDICATOR LAMP ACTIVE TEST
With CONSULT-III
Check "THEFT IND” in "ACTIVE TEST" mode with CONSULT-III.
Without CONSULT-III
1. Disconnect BCM.
2. Check voltage between BCM harness connector M18 terminal
23 and ground.
OK or NG
OK >> Security indicator lamp is OK.
NG >> GO TO 2.
2.SECURITY INDICATOR LAMP CHECK
Check security indicator lamp condition.
OK or NG
OK >> GO TO 3.
NG >> Replace security indicator lamp.
3.CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and combination meter.23 - 30 : Continuity should exist.
WIIA1300E
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M18 23 GroundON 0
OFF Battery voltage
LIIA0523E

VEHICLE SECURITY (THEFT WARNING) SYSTEM
BL-205
< SERVICE INFORMATION >
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1.CHECK DOOR SWITCHES INPUT SIGNAL
With CONSULT-III
Check door switches ("DOOR SW-DR", "DOOR SW-AS", "DOOR SW-RL", "DOOR SW-RR") in DATA MONI-
TOR mode with CONSULT–III. Refer to BL-196, "
CONSULT-III Function (BCM)".
• When doors are open:
• When doors are closed:
Without CONSULT-III
Check voltage between BCM connector M18 or M19 terminals 12, 13, 47, 48 and ground.
OK or NG
OK >> Door switch circuit is OK.
NG >> GO TO 2.
2.CHECK DOOR SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door switch and BCM.
3. Check continuity between door switch connector B8 (Front LH) or B108 (Front RH) terminal 2, B6 (Rear
LH) or B116 (Rear RH) terminal 1 and BCM connector M18, M19 terminals 12, 13, 47 and 48.
4. Check continuity between door switch connector B8 (Front LH)
or B108 (Front RH) terminal 2, B6 (Rear LH) or B116 (Rear RH)
terminal 1 and ground.
OK or NG
DOOR SW-DR : ON
DOOR SW-AS : ON
DOOR SW-RL : ON
DOOR SW-RR : ON
DOOR SW-DR : OFF
DOOR SW-AS : OFF
DOOR SW-RL : OFF
DOOR SW-RR : OFF
Connector ItemTe r m i n a l s
ConditionVoltage (V)
(Approx.)
( + ) ( – )
M19Front door
switch LH47
GroundOpen
↓
Closed0
↓
Battery voltage Rear door
switch LH48
M18Front door
switch RH12
Rear door
switch RH13
LIIA1177E
2 - 47 : Continuity should exist.
2 - 12 : Continuity should exist.
1 - 48 : Continuity should exist.
1 - 13 : Continuity should exist.
2 - Ground : Continuity should not exist.
1 - Ground : Continuity should not exist.
LIIA1350E

BL-206
< SERVICE INFORMATION >
VEHICLE SECURITY (THEFT WARNING) SYSTEM
OK >> GO TO 3.
NG >> Repair or replace harness.
3.CHECK DOOR SWITCHES
Check continuity between door switch terminal and switch case ground.
OK or NG
OK >> Check door switch case ground condition.
NG >> Replace door switch.
Diagnosis Procedure 8INFOID:0000000001704101
TRUNK LAMP SWITCH CHECK (SEDAN)
1.CHECK TRUNK LAMP SWITCH AND TRUNK RELEASE SOLENOID INPUT SIGNAL
With CONSULT-III
Check (“TRNK OPN MNTR”) in “DATA MONITOR” mode with CONSULT-III.
Without CONSULT-III
1. Turn ignition switch OFF.
2. Check voltage between BCM harness connector M19 terminal 42 and ground.
OK or NG
OK >> Trunk lamp switch and trunk release solenoid circuit is
OK.
NG >> GO TO 2.
2.CHECK TRUNK LAMP SWITCH AND TRUNK RELEASE SOLENOID
1. Turn ignition switch OFF.
2. Disconnect trunk lamp switch and trunk release solenoid connector.
3. Check continuity between trunk lamp switch and trunk release solenoid terminals 1 and 3.
Component TerminalsCondition of
switchContinuity
Front door switch
LH/RH2 – Case groundPushed No
Released Yes
Rear door switch
LH/RH1 – Case groundPushed No
Released Yes
LIIA0550E
Monitor item Trunk condition
TRNK OPN MNTROPEN : ON
CLOSED : OFF
ConnectorTe r m i n a l s
Trunk conditionVoltage (V)
(Approx.)
(+) (-)
M19 42 GroundCLOSED Battery voltage
OPEN 0
WIIA1179E

BL-208
< SERVICE INFORMATION >
VEHICLE SECURITY (THEFT WARNING) SYSTEM
• When key inserted in trunk key cylinder is turned to FULL STROKE:
• When key is removed from the trunk key cylinder:
Without CONSULT-III
Check voltage between BCM connector M19 terminal 41 and
ground.
OK or NG
OK >> Trunk key cylinder switch signal is OK.
NG >> GO TO 2.
2.CHECK TRUNK KEY CYLINDER SWITCH GROUND HARNESS
1. Turn ignition switch OFF.
2. Disconnect trunk key cylinder switch.
3. Check continuity between trunk key cylinder switch connector
B142 terminal 2 and body ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.CHECK TRUNK KEY CYLINDER SWITCH
Check continuity between trunk key cylinder switch terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace trunk key cylinder switch.
4.CHECK TRUNK KEY CYLINDER HARNESS
1. Disconnect BCM connector M19.TRUNK CYL SW : ON
TRUNK CYL SW : OFF
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
( + ) ( – )
M19
41GroundNeutral (N) 5
Full stroke (open) 0
WIIA1425E
Connector Terminals Continuity
B142 2 – Ground Yes
WIIA1427E
Terminals Trunk key cylinder switch position Continuity
1 – 2 Neutral (N) No
Full Stroke (open) Yes
WIIA1428E

BL-210
< SERVICE INFORMATION >
NATS (NISSAN ANTI-THEFT SYSTEM)
NATS (NISSAN ANTI-THEFT SYSTEM)
Component Parts and Harness Connector LocationINFOID:0000000001704103
System DescriptionINFOID:0000000001704104
DESCRIPTION
NOTE:
If customer reports a “No start” condition, request ALL KEYS to be brought to a Nissan dealer in case
of a NATS malfunction.
NATS (Nissan Anti-Theft System) has the following functions:
• NATS shows a higher anti-theft performance at preventing engine to be started by an unregistered key. (reg-
istered key: mechanical key and Intelligent Key).
• Only a key with key ID registered in BCM and ECM can start engine, it has a higher protection against auto
theft that duplicates keys.
• If a malfunction has been detected, security indicator will illuminate when ignition switch is in ON position.
• If the owner requires, mechanical key can be registered for up to 5 keys.
• During trouble diagnosis or when the following parts have been replaced, and if mechanical key is added,
registration* is required.
*: All mechanical keys of the vehicle should be registered.
-ECM
LIIA2920E
1. BCM M18, M19, M20
(view with glove box removed)2. Intelligent Key unit M52
(if equipped)3. NATS antenna amp. M21
(inside steering column)
4. Combination meter M24 5. Security indicator lamp 6. ECM E16

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-211
< SERVICE INFORMATION >
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-BCM
- Mechanical key
• NATS trouble diagnoses, system initialization and additional registration of other NATS mechanical key IDs
must be carried out using CONSULT-III hardware and CONSULT-III NATS software. When NATS initializa-
tion has been completed, the ID of the inserted mechanical key can be displayed.
Regarding the procedures of NATS initialization and mechanical key ID registration, refer to CONSULT-III
operation manual NATS.
SECURITY INDICATOR
• Forewarns that the vehicle is equipped with NATS.
• Security indicator will not blink while the ignition knob is in ON or START state.
NOTE:
Because security indicator is highly efficient, the battery is barely affected.
Condition of Security Indicator
• When operating the ignition switch with Intelligent Key, security indicator lamp will turn off at once if ignition
switch is pressed and blinks when ignition switch is released.
• When operating the ignition switch with mechanical key security indicator will turn off at once if mechanical
key is inserted into key cylinder and blinks when mechanical key is removed.
(Once the mechanical key is inserted into key cylinder, BCM will only perform the key ID verification with
mechanical key)
System CompositionINFOID:0000000001704105
The function of the NATS consists of the following:
• Mechanical key
• NATS antenna amp. located in the ignition key cylinder
•BCM
• ECM (Engine control module)
• Security indicator
• Intelligent Key unit (if equipped)
NOTE:
The communication between ECM, BCM and/or Intelligent Key unit uses the CAN communication sys-
tem.
ECM Re-communicating FunctionINFOID:0000000001704106
Performing the following procedure can automatically perform re-communication of ECM and BCM or Intelli-
gent Key unit, but only when the ECM has been replaced with a new one which has never been energized on-
board.
(In this step, initialization procedure by CONSULT-III is not necessary)
NOTE:
•When registering new Key IDs or replacing the ECM other than brand new, refer to CONSULT-III
Operation Manual NATS.
LIIA2637E

BL-212
< SERVICE INFORMATION >
NATS (NISSAN ANTI-THEFT SYSTEM)
•If multiple keys are attached to the key holder, separate them before work.
•Distinguish keys with unregistered key ID from those with registered ID.
1. Install ECM.
2. Use a registered key (*), turn ignition switch to “ON”.
*: To perform this step, use the key that has been used before to perform ECM replacement.
3. Maintain ignition switch in “ON” position for at least 5 seconds.
4. Turn ignition switch to “OFF”.
5. Start engine.
If engine can be started, procedure is completed.
If engine cannot be started, refer to CONSULT-III Operation Manual NATS and initialize control unit.