2009 NISSAN LATIO ignition

OK >> GO TO 3
NG >> Repair or replace key switch and ignition knob switch power supply circuit. OK >> GO TO 4
NG >> Replace key cylinder assembly (built-in key switch). OK >> Check the condition of harness and harness connector.
NG >> Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.
Key Switch (BCM Input) Check INFOID:0000000004305048

INTELLIGENT KEY SYSTEM
BL-129
< SERVICE INFORMATION >
C
D E
F
G H
J
K L
M A
B BL
N
O P
1. Remove mechanical key from ignition switch.
2. Disconnect key switch and i gnition knob switch connector.
3. Check voltage between key switch and ignition knob switch and
ground.
OK or NG OK >> GO TO 2
NG >> Check harness between key switch and ignition knob switch and fuse. 2.
CHECK KEY SWITCH OPERATION
Check continuity of key switch and ignition knob switch.
OK or NG OK >> GO TO 3
NG >> Replace key cylinder assembly (built-in key switch). 3.
CHECK KEY SWITCH CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM connector (A) M18 terminal 37 and key switch and ignition knob switch
connector (B) terminal 1.
3. Check continuity between BCM connector (A) M18 terminal 37 and ground.
OK or NG OK >> Key switch (BCM input) circuit is OK.
NG >> Repair or replace harness between key switch and ignition knob switch and BCM.
Ignition Knob Switch Check INFOID:00000000043050491.
CHECK IGNITION KNOB SWITCH INPUT SIGNAL
With CONSULT-III Terminals
Voltage (V)(Approx.)
(+)
(–)
Key switch and ig-
nition knob switch
connector Terminal
M73 2 Ground Battery voltage PIIB6598E
Terminal
Condition of key switch Continuity
Key switch and ignition knob switch
1 2 Insert mechanical key into
ignition switch Yes
Remove mechanical key from ignition switch No PIIB6599E
A B
Continuity
BCM connector Terminal Key switch and ig-
nition knob switch connector Terminal
M18 37 M73 1 Yes
A GroundContinuity
BCM connector Terminal
M18 37 No PIIB6601E

OK >> Ignition knob switch circuit is OK.
NG >> GO TO 2 OK >> GO TO 3
NG >> Repair or replace key switch and ignition knob switch power supply circuit. OK >> GO TO 4
NG >> Replace key switch and ignition knob switch. Monitor item Condition
PUSH SW Ignition switch is pressed: ON
Ignition switch is released: OFF Terminals
Condition of key switch Voltage (V)
(Approx.)
(+)
(–)
Intelligent Key unit
connector Terminal
M52 27 Ground Ignition switch is
pressed Battery voltage
Ignition switch is released 0

BL
N
O P OK >> Check the condition of harness and harness connector.
NG >> Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.
Door Switch Check (Hatchback) INFOID:0000000004305050CONSULT-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, 43, 47, 48 and ground.
A B
Continuity
Intelligent Key unit
connector TerminalKey switch and ig-
nition knob switch
connector Terminal
M52 27 M73 3 Yes
A GroundContinuity
Intelligent Key unit connector Terminal
M52 27 No

BL-132< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
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 (B) B8 (front LH), B108 (front RH) terminal 2 or (C) B6
(rear LH), B116 (rear RH) terminal 1 or back door lock assembly connector (D) D405 terminal 3 and BCM
connectors (A) M18, M19 terminals 12, 13, 43, 47 and 48.
4. Check continuity between door switch connector (B) B8 (front
LH), B108 (front RH) terminal 2 or (C) B6 (rear LH), B116 (rear
RH) terminal 1 or back door lock assembly connector (D) D405
terminal 3 and ground.
OK or NG OK >> GO TO 3
NG >> Repair or replace harness. 3.
CHECK DOOR SWITCHES
FRONT AND REAR DOORS Connector Item
Terminals
ConditionVoltage (V)
(Approx.)
( + ) ( – )
M18 Front door
switch RH 12
Ground Open
↓
Closed 0
↓
Battery voltage
Rear door
switch RH 13
M19 Back door
switch 43
Front door switch LH 47
Rear door switch LH 48 LIIA1041E
1 - 13 : Continuity should exist.
1 - 48 : Continuity should exist.
2 - 12 : Continuity should exist.
2 - 47 : Continuity should exist.
3 - 43 : Continuity should exist.
1 - Ground : Continuity should not exist.
2 - Ground : Continuity should not exist.
3 - Ground : Continuity should not exist. WIIA1244E

BL-134< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
Door Switch Check (Sedan) INFOID:00000000043050511.
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-117, " CONSULT-III Application Item " .
• 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. 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

INTELLIGENT KEY SYSTEM
BL-135
< SERVICE INFORMATION >
C
D E
F
G H
J
K L
M A
B BL
N
O P
OK or NG 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.
Door Request Switch Check INFOID:00000000043050521.
CHECK DOOR REQUEST SWITCH
With CONSULT-III
Check door request switch (“DR REQ SW” or “AS REQ SW”) in “DATA MONITOR” mode.
Without CONSULT-III
1. Turn ignition switch OFF.
2. Check voltage between Intelligent Key unit harness connector and ground.
OK or NG OK >> Door request switch circuit is OK.
NG >> GO TO 2 2.
CHECK DOOR REQUEST SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit and front door request switch connector.
3. Check continuity between Intelligent Key uni t connector and front door request switch connector.
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 Condition
DR REQ SW
AS REQ SW Door request switch is pressed: ON
Door request switch is released: OFF Terminals
Door re-
quest
switch
Condition Voltage (V)
(Approx.)
(+)
(–)
Intelligent Key unit
connector Terminal
M52 Front door re-
quest switch LH 5
Ground Pressed 0
Released 5
Front door re-
quest switch RH 25Pressed 0
Released 5 PIIB6613E

INTELLIGENT KEY SYSTEM
BL-139
< SERVICE INFORMATION >
C
D E
F
G H
J
K L
M A
B BL
N
O P
Without CONSULT-III
1. Turn ignition switch OFF.
2. Check voltage between Intelligent Key unit connector and ground.
OK or NG OK >> Trunk opener request switch circuit is OK.
NG >> GO TO 2 2.
CHECK TRUNK OPENER REQUEST SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit and trunk opener request switch connector.
3. Check continuity between Intelligent Key unit connector (A) M52 terminal 29 and trunk opener request switch connector (B) B129 terminal 1.
4. Check continuity between Intelligent Key unit connector (A) M52 terminal 29 and ground.
OK or NG OK >> GO TO 3
NG >> Repair or replace harness between Intelligent Key unit and trunk opener request switch. 3.
CHECK TRUNK OPENER REQUEST SWITCH OPERATION
Check continuity of trunk opener request switch.
OK or NG OK >> GO TO 4
NG >> Replace trunk opener request switch. Monitor item Condition
BD/TR REQ SW Trunk opener request switch is pressed: ON
Trunk opener request switch is released: OFF Terminals
Trunk opener
request switch condition Voltage (V)
(Approx.)
(+)
(–)
Intelligent Key
unit connector Terminal
M52 29 Ground Pressed 0
Released 5 PIIB6617E
A B
Continuity
Intelligent Key
unit connector Terminal Trunk opener re-
quest switch con-
nector Terminal
M52 29 B129 1 Yes
A GroundContinuity
Intelligent Key unit
connector Terminal
M52 29 No PIIB6618E
Terminal
trunk opener request
switch condition Continuity
trunk opener request switch
1 2 Pressed Yes
Released No PIIB6336E