2009 NISSAN LATIO door lock

BL-40< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
43 5
R Back door switch Input OFF ON (open) 0V
OFF (closed) Ba ttery voltage
44 5
LG Rear wiper auto stop Input ON Rear wiper operating 0
Rear wiper stopped Battery
45 7
GR Lock switch Input OFF ON (lock) 0V
OFF Battery voltage
46 7
L Unlock switch Input OFF ON (unlock) 0V
OFF Battery voltage
47 BR Front door switch LH Input OFF ON (open) 0V
OFF (closed) Ba ttery voltage
48 O Rear door switch LH Input OFF ON (open) 0V
OFF (closed) Ba ttery voltage
49 P Luggage room lamp Output OFF Any door open (ON) 0V
All doors closed (OFF) Battery voltage
50 SB A/C indicator Output ON A/C OFF 0
A/C ON Battery voltage
53 5
RBack door lock assem-
bly (actuator) Output OFF Back door (open) Battery voltage
53 6
RTrunk lamp switch and
trunk release solenoid Output OFF Trunk lid (open) Battery voltage
55 5
VRear wiper motor out-
put Output ONOFF 0
ON Battery voltage
56 R Battery saver output Output OFF
30 minutes after ignition
switch is turned OFF 0V
ON — Battery voltage
57 LG Battery power supply Input OFF — Battery voltage
59 7
GFront door lock actua-
tor LH (unlock) Output OFFOFF (neutral) 0V
ON (unlock) Battery voltage
60 V Turn signal (left) Output ON Turn left ON
61 W Turn signal (right) Output ON Turn right ON
63 BR Interior room lamp Output OFF Any door
switch ON (open) 0V
OFF (closed) Battery voltage
Terminal
Wire
color Signal name Signal
input/
output Measuring condition
Reference value or waveform
(Approx.)
Ignition
switch Operation or condition SKIA3009J
SKIA3009J

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1: With Intelligent Key
2: Without Intelligent Key
3: Hatchback without Intelligent Key
4: Sedan without Intelligent Key
5: Hatchback
6: Sedan
7: With power door locks
8: With power windows
Work Flow INFOID:0000000004304994
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to BL-23, " System Description " .
3. According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to BL-119," Trouble Diagnosis Symptom Chart " .
4. Does power door lock system operate normally? OK: GO TO 5, NG: GO TO 3.
5. Inspection End.
CONSULT-III Function (BCM) INFOID:0000000004304995
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following. 65
7
SBAll door lock actuators
(lock) Output OFFOFF (neutral) 0V
ON (lock) Battery voltage
66 7
GFront door lock actua-
tor RH, rear door lock
actuators LH/RH (un-
lock) Output OFFOFF (neutral) 0V
ON (unlock) Battery voltage
67 B Ground Input ON — 0V
68 8
LPower window power
supply (RAP) Output —Ignition switch ON Battery voltage
Within 45 seconds after igni-
tion switch OFF Battery voltage
More than 45 seconds after ig-
nition switch OFF 0V
When front door LH or RH is
open or power window timer
operates 0V
69 8
P Battery power supply
OutputOFF
— Battery voltage
70 Y Battery power supply Input OFF — Battery voltage
Terminal
Wire
color Signal name Signal
input/
output Measuring condition
Reference value or waveform
(Approx.)
Ignition
switch Operation or condition

Work item Description
DOOR LOCK-UNLOCK SET Select unlock mode can be changed in this mode. Selects ON-OFF of select unlock mode.
ANTI-LOCK OUT SET Key reminder door mode can be changed in this mode. Selects ON-OFF of key reminder door mode.
AUTOMATIC DOOR LOCK
SELECT The following modes can be selected for automatic door lock function:
• VH SPD: All doors are locked when vehicle speed is more than 15 MPH (25 km/h) (factory setting).
• SHIFT OUT OF P: Not allowed.
AUTOMATIC DOOR UN-
LOCK SELECT The following modes can be selected for automatic door unlock function:
• MODE1: Allowed (factory setting for vehicles with Intelligent Key). All doors are unlocked when the ignition switch is turned from ON to OFF.
• MODE2: Not allowed.
• MODE3: Allowed (factory setting for vehicles without Intelligent Key). All doors are unlocked when the key is removed from the ignition switch.
• MODE4: Not allowed.
• MODE5: Not allowed.
• MODE6: Not allowed.
AUTOMATIC LOCK/UNLOCK
SELECT • ON
• OFF Monitor item Content
IGN ON SW Indicates [ON/OFF] condition of ignition switch in ON position.
KEY ON SW Indicates [ON/OFF] condition of key switch.
CDL LOCK SW Indicates [ON/OFF] condition of lock signal from door lock and unlock switch.
CDL UNLOCK SW Indicates [ON/OFF] condition of unlock signal from door lock and unlock switch.
DOOR SW-DR Indicates [ON/OFF] condition of front door switch LH.
DOOR SW-AS Indicates [ON/OFF] condition of front door switch RH.
DOOR SW-RR Indicates [ON/OFF] condition of rear door switch RH.
DOOR SW-RL Indicates [ON/OFF] condition of rear door switch LH.
BACK DOOR SW Indicates [ON/OFF] condition of back door switch.
KEY CYL LK-SW Indicates [ON/OFF] conditio n of lock signal from key cylinder.
KEY CYL UN-SW Indicates [ON/OFF] condition of unlock signal from key cylinder.
KEYLESS LOCK* Indicates [ON/OFF] condit ion of lock signal from keyfob.
KEYLESS UNLOCK* Indicates [ON/OFF] condit ion of unlock signal from keyfob.
I-KEY LOCK** Indicates [ON/OFF] condition of lock signal from door request switch.
I-KEY UNLOCK** Indicates [ON/OFF] condition of unlock signal from door request switch.

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*: With Remote Keyless Entry system
**: With Intelligent Key system
ACTIVE TEST
Trouble Diagnosis Symptom Chart INFOID:0000000004304996
BCM Power Supply and Gr ound Circuit Inspection INFOID:0000000004678560OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate caus e of malfunction before installing new fuse. Refer to PG-3, " Schematic " .
Test item Content
ALL LOCK This test is able to check all door lock actuators lock operation. These actuators lock when "ON"
on CONSULT–III screen is touched.
ALL UNLOCK This test is able to check all door lock actuators unlock operation. These actuators unlock when
"ON" on CONSULT–III screen is touched.
DR UNLOCK This test is able to check front door lock actuator LH unlock operation.These actuators lock
when "ON" on CONSULT– III screen is touched.
OTHER UNLOCK This test is able to check door lock actuators (except front door lock actuator LH) unlock oper-
ation. These actuators unlock when "ON" on CONSULT–III screen is touched. Symptom Repair order Refer to page
Key reminder door function does not operate properly. 1. BCM power supply and ground circuit check
BCS-15 2. Door switch check (hatchback)
BL-44 3. Door switch check (sedan)
BL-47 4. Key switch (insert) check
BL-48 5. Replace BCM.
BCS-18Power door lock does not operate with door lock and un-
lock switch on main power window and door lock/unlock
switch or power window and door lock/unlock switch RH 1. Door lock/unlock switch check
BL-49 2. Replace BCM.
BCS-18One or both rear door lock actuators do not operate. 1. Passenger select unlock relay circuit check
BL-55Front door lock assembly LH (actuator) does not operate. 1. Front door lock assembly LH (actuator) check
BL-52Specific door lock actuator does not operate. 1. Door lock actuator check (Front RH, Rear LH/RH)
BL-53Power door lock does not operate with front door key cyl-
inder switch operation. 1. Front door key cylinder switch check
BL-54 2. Replace BCM.
BCS-18All power door locks do not operate.
1. BCM power supply and ground circuit check
BCS-15 2. Door lock/unlock switch check
BL-49 3. Replace BCM.
BCS-18Vehicle speed sensing auto door LOCK operation does
not operate. 1. Ensure automatic door lock/unlock function (lock
operation) is enabled. BL-41 2. Check combination meter vehicle speed signal.
DI-15 3. Check intermittent incident.
GI-22Ignition OFF interlock auto door UNLOCK function does
not operate. 1. Ensure automatic door lock/unlock function (unlock
operation) is enabled. BL-41 2. Check BCM for DTCs.
BCS-17 3. Check intermittent incident.
GI-22

BL-44< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM2.
CHECK BCM POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM connectors and ground.
OK or NG OK >> GO TO 3.
NG >> Repair or replace the harness. 3.
CHECK GROUND CIRCUIT
Check continuity between BCM connector M20 terminal 67 and
ground.
OK or NG OK >> Power supply and ground circuit is OK.
NG >> Repair or replace harness.
Door Switch Check (Hatchback) INFOID:00000000043049981.
CHECK DOOR SWITCHES INPUT SIGNAL
With CONSULT-III
Check door switches ("DOOR SW-DR", "DOOR SW-AS", "DOOR SW-RL", "DOOR SW-RR", "BACK DOOR
SW") in DATA MONITOR mode with CONSULT–III. Refer to BL-41, " CONSULT-III Function (BCM) " .
• When doors are open:
• When doors are closed: Connector
Terminals
Power
source Condition Voltage (V) (Ap-
prox.)
(+) (-)
M18 11 Ground
ACC
power
supply Ignition
switch
ACC or ON Battery voltage
38 Ground Ignition
power
supply Ignition
switch ON
or START Battery voltage
M20 57 Ground
Battery
power
supply Ignition
switch OFF Battery voltage
70 Ground Battery
power
supply Ignition
switch OFF Battery voltage LIIA2415E
67 - Ground : Continuity should exist.
LIIA0915E
DOOR SW-DR : ON
DOOR SW-AS : ON
DOOR SW-RL : ON
DOOR SW-RR : ON
BACK DOOR SW : ON
DOOR SW-DR : OFF
DOOR SW-AS : OFF

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OK or NG OK >> Check the following.
• 10A fuse (No. 31, located in fuse and fusible link
block)
• Harness for open or short between key switch and ignition knob switch and fuse
• Harness for open or short between BCM and key switch and ignition knob switch
NG >> Replace key switch and ignition knob switch. 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.
Door Lock and Unlock Switch Check INFOID:0000000004305001

OK >> Door lock and unlock switch is OK.
NG >> GO TO 2 OK >> GO TO 3
NG >> Replace door lock/unlock switch.

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3. Check continuity between power window and door lock/unlock
switch RH connector D105 terminal 3 and ground
OK or NG OK >> GO TO 4
NG >> Repair or replace harness.