2009 NISSAN LATIO air condition

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

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

OK >> GO TO 3
NG >> Repair or replace harness between Intelligent Key unit and back door request switch. OK >> GO TO 4
NG >> Replace back door request switch. OK >> GO TO 5
NG >> Repair or replace back door request switch ground cir- cuit. OK >> Check the condition of harness and connector.
NG >> Replace Intelligent Key unit. Refer to BL-158, " Removal
and Installation of Intelligent Key Unit " .
Trunk Opener Request Switch Check (Sedan) INFOID:0000000004305054Terminal
Back door request
switch condition Continuity
Back door request switch
1 2 Pressed Yes
Released No

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

BL-140< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM4.
CHECK TRUNK OPENER REQU EST SWITCH GROUND CIRCUIT
Check continuity between trunk opener request switch connector B129 terminal 2 and ground.
OK or NG OK >> GO TO 5
NG >> Repair or replace trunk opener request switch ground
circuit. 5.
CHECK INTELLIGENT KEY UNIT OUTPUT SIGNAL
1. Connect Intelligent Key unit connector.
2. Check voltage between Intelligent Key unit connector M52 terminal 29 and ground.
OK or NG OK >> Check the condition of harness and connector.
NG >> Replace Intelligent Key unit. Refer to BL-158, " Removal
and Installation of Intelligent Key Unit " .
Unlock Sensor Check INFOID:00000000043050551.
CHECK UNLOCK SENSOR INPUT SIGNAL
Check voltage between Intelligent Key unit connector and ground.
OK or NG OK >> Unlock sensor circuit is OK.
NG >> GO TO 2 2.
CHECK UNLOCK SENSOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit and front door lock actuator LH (door unlock sensor) connector.
3. Check continuity between Intelligent Key unit connec tor (A) terminal 28 and front door lock actuator LH
(door unlock sensor) connector (B) terminal 4.
Trunk opener request
switch connector Terminal
GroundContinuity
B129 2 Yes PIIB6337E
Terminals
Voltage (V)(Approx.)
(+)
(–)
Intelligent Key unit
connector Terminal
M52 29 Ground 5 PIIB6617E
Terminals
Front door
lock
(driver side) condition Voltage (V)
(Approx.)
(+)
(–)
Intelligent Key
unit connector Terminal
M52 28 Ground Locked 5
Unlocked 0 PIIB6638E

BL
N
O P
Do the hazard lamps flash? Yes >> Rear bumper antenna is OK.
No >> GO TO 2 OK >> Rear bumper antenna is OK.
NG >> GO TO 3 OK >> GO TO 4
NG >> Repair or replace harness between Intelligent Key unit and rear bumper antenna. Terminals
Condition Signal
(Reference value.)
(+)
(–)
Intelligent
Key unit
connector Terminal
M52 17 Ground Back door
request
switch is
pushed SIIA1910J
A B Continuity
Intelligent Key unit
connector Terminal
Rear bumper an-
tenna connector Terminal
M52 17
B2 1
Yes
18 2
A GroundContinuity
Intelligent Key unit
connector Terminal
M52 17
No
18

INTELLIGENT KEY SYSTEM
BL-147
< 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 between Intelligent Key unit and inside key antenna. 3.
CHECK INSIDE KEY ANTENNA INPUT SIGNAL 2
1. Replace inside key antenna. (New antenna or other antenna)
2. Connect Intelligent Key unit and inside key antenna connector.
3. Check signal between Intelligent Key unit connector and ground with oscilloscope.
OK or NG OK >> Replace malfunction inside key antenna.
NG >> Replace Intelligent Key unit.
Steering Lock Solenoid Check INFOID:00000000043050601.
CHECK STEERING LOCK SOLENOID POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect steering lock solenoid connector.
3. Check voltage between steering lock solenoid and ground.
OK or NG OK >> GO TO 2
NG >> Repair or replace steering lock solenoid power supply
circuit. 2.
CHECK STEERING LOCK SOLENOID GROUND CIRCUIT A
GroundContinuity
Intelligent Key unit
connector Terminal
M52 Instrument panel
13
No
14
Front console 15
16
Rear floor 33
34 Terminals
ConditionSignal
(Reference value.)
(+)
(–)
Intelligent Key unit
connector Ter-
minal
M52 Instrument
panel area 13
Ground Any door
is open →
close
Front con-
sole area 15
Rear floor area 33 WIIA1200E
PIIB5502J
Terminals Voltage (V)(Approx.)
(+)
(–)
Steering lock sole-
noid Terminal
M6 1 Ground Battery voltage PIIB6632E