NISSAN LATIO 2009 Service Repair Manual

BL-240< SERVICE INFORMATION >
VEHICLE SECURITY (T
HEFT 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 c onnector M52 (A) terminal 23 and BCM connector M18 (B)
terminal 30. When back door is open :
Continuity should exist.
When back door is closed : Co ntinuity should not exist. WIIA1245E
4 - Ground : Continuity should exist.
WIIA1246E
30 - Ground : Continuity should not exist.
WIIA1299E

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OK or NG OK >> Door switch circuit is OK.
NG >> Repair or replace harness.
Diagnosis Procedure 2 INFOID:0000000004305127
SECURITY INDICATOR LAMP CHECK OK >> Security indicator lamp is OK.
NG >> GO TO 2. OK >> GO TO 3.
NG >> Replace security indicator lamp.

OK >> Check the following:
• 10A fuse [No. 13, located in fuse block (J/B)]
• Harness for open or short between combination meter and fuse
NG >> Repair or replace harness.
Diagnosis Procedure 3 INFOID:0000000004305128YES >> Front door lock assembly LH (key cylinder switch) is OK.
NO >> Check front door lock assembly LH (key cylinder switch) circuit. Refer to BL-54, " Front Door Key
Cylinder Switch LH Check " .
Diagnosis Procedure 4 INFOID:0000000004305129
VEHICLE SECURITY HORN ALARM CHECK YES >> Check harness for open or short between IPDM E/R and horn relay.
NO >> Check horn circuit. Refer to WW-38 .
Diagnosis Procedure 5 INFOID:0000000004305130
VEHICLE SECURITY HEADLAMP ALARM CHECK YES >> Headlamp alarm is OK.
NO >> Check headlamp system. Refer to LT-4 or
LT-25 .
Diagnosis Procedure 6 INFOID:0000000004305131
DOOR LOCK/UNLOCK SWITCH CHECK YES >> Door lock/unlock switch is OK.
NO >> Refer to BL-49, " Door Lock and Unlock Switch Check " .
Diagnosis Procedure 7 INFOID:0000000004305132
DOOR SWITCH CHECK (SEDAN) 23 - 18 : Continuity should exist.
23 - Ground : Continuity should not exist.

VEHICLE SECURITY (THEFT WARNING) SYSTEM
BL-243
< SERVICE INFORMATION >
C
D E
F
G H
J
K L
M A
B BL
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O P 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-233, " 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 (F ront 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 Item
Terminals
ConditionVoltage (V)
(Approx.)
( + ) ( – )
M19 Front door
switch LH 47
Ground Open
↓
Closed 0
↓
Battery voltage
Rear door
switch LH 48
M18 Front door
switch RH 12
Rear door
switch RH 13 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-244< SERVICE INFORMATION >
VEHICLE SECURITY (T
HEFT 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 8 INFOID:0000000004305133
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 A ND 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 Terminals
Condition of
switch Continuity
Front door switch LH/RH 2 – Case ground Pushed No
Released Yes
Rear door switch LH/RH 1 – Case ground Pushed No
Released Yes LIIA0550E
Monitor item Trunk condition
TRNK OPN MNTR OPEN : ON
CLOSED : OFF Connector
Terminals
Trunk condition Voltage (V)
(Approx.)
(+) (-)
M19 42 Ground CLOSED Battery voltage
OPEN 0 WIIA1179E

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OK or NG OK >> GO TO 3
NG >> Replace trunk lamp switch and trunk release solenoid. OK >> GO TO 4
NG >> Repair or replace harness between BCM and trunk room lamp switch. OK >> Check connection of harness and connector.
NG >> Repair or replace trunk lamp switch and trunk release solenoid ground circuit.
Diagnosis Procedure 9 INFOID:0000000004305134
TRUNK KEY CYLINDER SWITCH CHECK (SEDAN) 41, " CONSULT-III Function (BCM) " .
Terminals Trunk condition Continuity
1 3 CLOSED No
OPEN Yes

OK >> Trunk key cylinder switch signal is OK.
NG >> GO TO 2 OK >> GO TO 3
NG >> Repair or replace harness. OK >> GO TO 4
NG >> Replace trunk key cylinder switch.

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2. Check continuity between BCM connector (A) M19 terminal 41
and trunk key cylinder switch connector (B) B142 terminal 1 and
body ground.
OK or NG OK >> Trunk key cylinder switch circuit is OK.
NG >> Repair or replace harness. Connector Terminal Connector Terminal Continuity
A: M19 41 B: B142 1 Yes
Ground No

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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 CO NSULT-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 mec hanical 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 Secu rity Indicator
• When operating the ignition switch with Intelligent Key, se curity 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 Composition INFOID:0000000004305137
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 K ey unit uses the CAN communication sys-
tem.
ECM Re-communicating Function INFOID:0000000004305138
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 procedur e 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.