2008 NISSAN LATIO door lock

POWER DOOR LOCK SYSTEM
BL-41
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
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.
Key Switch (Insert) CheckINFOID:0000000001703967
1.CHECK KEY SWITCH INPUT SIGNAL
With CONSULT-III
Check key switch "KEY ON SW" in DATA MONITOR mode with CONSULT–III. Refer to BL-36, "
CONSULT-III
Function (BCM)" .
• When key is inserted into ignition key cylinder:
• When key is removed from ignition key cylinder:
Without CONSULT-III
Check voltage between BCM connector and ground.
OK or NG
OK >> Key switch circuit is OK.
NG-1 >> GO TO 2 (with Intelligent Key).
NG-2 >> GO TO 3 (without Intelligent Key).
2.CHECK KEY SWITCH (WITH INTELLIGENT KEY)
1. Turn ignition switch OFF.
2. Disconnect key switch and ignition knob switch connector.
3. Check ignition knob switch key switch and ignition knob key switch.2 - Ground : Continuity should not exist.
1 - Ground : Continuity should not exist.
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
KEY ON SW : ON
KEY ON SW : OFF
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
( + ) ( – )
M18 37 GroundKey is inserted. Battery voltage
Key is removed. 0
LIIA0567E

BL-42
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
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.
3.CHECK KEY SWITCH (WITHOUT INTELLIGENT KEY)
1. Turn ignition switch OFF.
2. Disconnect key switch and key lock solenoid connector.
3. Check key switch.
OK or NG
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 CheckINFOID:0000000001703968
1.CHECK DOOR LOCK AND UNLOCK INPUT SIGNAL
With CONSULT-III
Check door lock and unlock switch (“CDL LOCK SW” and “CDL UNLOCK SW”) in DATA MONITOR mode with
CONSULT-III.
Without CONSULT-III
Check voltage between BCM connector and ground
Te r m i n a l
Condition Continuity
Key switch and ignition knob
switch
12KeyInserted Yes
Removed No
PIIB6411E
Terminals Condition Continuity
1 – 2Key is inserted. Yes
Key is removed. No
PIIB6411E
Test item Condition
CDL LOCK SWDoor lock and unlock switch is turned to LOCK : ON
Other than above : OFF
CDL UNLOCK SWDoor lock and unlock switch is turned to UNLOCK : ON
Other than above : OFF

POWER DOOR LOCK SYSTEM
BL-43
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
OK or NG
OK >> Door lock and unlock switch is OK.
NG >> GO TO 2.
2.CHECK DOOR LOCK/UNLOCK SWITCH
1. Turn ignition switch OFF.
2. Disconnect door lock/unlock switch.
3. Check continuity between main power window and door lock/
unlock switch terminals 6, 17 and 18.
4. Check continuity between power window and door lock/unlock
switch RH terminals 1, 2 and 3.
OK or NG
OK >> GO TO 3.
NG >> Replace door lock/unlock switch.
3.CHECK DOOR LOCK/UNLOCK SWITCH GROUND HARNESS
1. Disconnect main power window and door lock/unlock switch or power window and door lock/unlock switch
RH.
2. Check continuity between main power window and door lock/
unlock switch connector D8 terminal 17 and ground.
Te r m i n a l s
Door lock and unlock
switch conditionVoltage (V)
(Approx.) (+)
(–)
BCM
connectorTe r m i n a l
M1945
GroundLock 0
Neutral / Unlock Battery voltage
46Unlock 0
Neutral / Lock Battery voltage
PIIB6412E
Terminal Condition Continuity
18
17Lock Yes
Unlock/Neutral No
6Unlock Yes
Lock/Neutral No
WIIA1107E
Terminal Condition Continuity
1
3Lock Yes
Unlock/Neutral No
2Unlock Yes
Lock/Neutral No
WIIA1108E
17 - Ground : Continuity should exist.
WIIA1109E

BL-44
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
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.
4.CHECK DOOR LOCK SWITCH CIRCUIT
1. Disconnect BCM.
2. Check continuity between BCM connector M19 (A) terminal 45 and main power window and door lock/
unlock switch connector D8 (B) terminal 18 or power window and door lock/unlock switch RH connector
D105 (C) terminal 1.
3. Check continuity between BCM connector M19 terminal 45 and
ground.
4. Check continuity between BCM connector M19 (A) terminal 46 and main power window and door lock/
unlock switch LH connector D7 (B) terminal 6 or power window and door lock/unlock switch RH connector
D105 (C) terminal 2.3 - Ground : Continuity should exist.
WIIA0450E
1 - 45 : Continuity should exist.
18 - 45 : Continuity should exist.
45 - Ground : Continuity should not exist.
W I I A 111 0 E

POWER DOOR LOCK SYSTEM
BL-45
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
5. Check continuity between BCM connector M19 terminal 46 and
ground.
OK or NG
OK >> Replace BCM. Refer to BCS-18, "Removal and Installa-
tion of BCM" .
NG >> Repair or replace harness.
Front Door Lock Assembly LH (Actuator) CheckINFOID:0000000001703969
1.CHECK FRONT DOOR LOCK ASSEMBLY LH (ACTUATOR) HARNESS
1. Turn ignition switch OFF.
2. Disconnect BCM and front door lock assembly LH (actuator).
3. Check continuity between BCM connector (A) M20 terminals 59,
65 and front door lock assembly LH (actuator) connector (B) D3
terminals 2, 3.
4. Check continuity between BCM connector (A) M20 terminals 59,
65 and body ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2.CHECK FRONT DOOR LOCK ASSEMBLY LH SIGNAL
1. Reconnect BCM.2 - 46 : Continuity should exist.
6 - 46 : Continuity should exist.
46 - Ground : Continuity should not exist.
W I I A 1111 E
Connector Terminal Connector Terminal Continuity
A: M2059
B: D32Yes
65 3 Yes
Connector Terminals Continuity
A: M2059
GroundNo
65 No
LIIA2525E

BL-46
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
2. Check voltage between BCM connector M20 terminals 59, 65
and ground.
OK or NG
OK >> Replace front door lock assembly LH (actuator). Refer to BL-150, "Removal and Installation" .
NG >> Replace BCM. Refer to BCS-18, "
Removal and Installation of BCM" .
Door Lock Actuator Check (Front RH and Rear LH/RH)INFOID:0000000001703970
1.CHECK DOOR LOCK ACTUATOR HARNESS
NOTE:
For models with Intelligent Key, insure that passenger select unlock relay remains connected during this test.
1. Turn ignition switch OFF.
2. Disconnect BCM and each door lock actuator.
3. Check continuity between BCM connector (A) M20 terminals 65,
66 and front door lock actuator RH connector (B) D114, rear
door lock actuator RH connector (B) D305, rear door lock actua-
tor LH connector (C) D205 terminals 2, 3.
4. Check continuity between BCM connector (A) M20 terminals 65, 66 and body ground.
OK or NG
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M2059
GroundMain power window and
door lock/unlock switch
is turned to UNLOCK0 → Battery voltage
65Main power window and
door lock/unlock switch
is turned to LOCK0 → Battery voltage
LIIA1355E
Connector Terminal Connector Terminal Continuity
A: M2065 B: D114 C:
D205 D:
D3053Yes
66 2 Yes
LIIA2526E
Connector Terminals Continuity
A: M2065
GroundNo
66 No

POWER DOOR LOCK SYSTEM
BL-47
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
OK >> GO TO 2.
NG >> Check the following:
• Without Intelligent Key: Repair or replace harness.
• With Intelligent Key: For front doors, repair or replace harness.
• With Intelligent Key: For rear door, repair or replace harness or passenger select unlock relay.
2.CHECK DOOR LOCK ACTUATOR SIGNAL
1. Reconnect BCM.
2. Check voltage between BCM connector M20 terminals 65, 66
and ground.
OK or NG
OK >> Replace front door lock assembly RH or rear door lock actuator LH/RH. Refer to BL-150,
"Removal and Installation" or BL-153, "Removal and Installation" .
NG >> Replace BCM. Refer to BCS-18, "
Removal and Installation of BCM" .
Front Door Key Cylinder Switch LH CheckINFOID:0000000001703971
1.CHECK FRONT DOOR KEY CYLINDER SWITCH LH
With CONSULT-III
Check front door key cylinder switch ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in DATA MONITOR mode
in CONSULT–III. Refer to BL-36, "
CONSULT-III Function (BCM)" .
• When key inserted in front key cylinder is turned to LOCK:
• When key inserted in front key cylinder is turned to UNLOCK:
Without CONSULT-III
Check voltage between BCM connector M18 terminals 7, 8 and
ground.
OK or NG
OK >> Front door key cylinder switch LH signal is OK.
NG >> GO TO 2.
2.CHECK FRONT DOOR KEY CYLINDER SWITCH LH GROUND HARNESS
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M2065
GroundMain power window and
door lock/unlock switch is
turned to UNLOCK0 → Battery voltage
66Main power window and
door lock/unlock switch is
turned to LOCK0 → Battery voltage
LIIA1357E
KEY CYL LK-SW : ON
KEY CYL UN-SW : ON
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
( + ) ( – )
M187
GroundNeutral/Lock 5
Unlock 0
8Neutral/Unlock 5
Lock 0
WIIA1247E

BL-48
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
1. Turn ignition switch OFF.
2. Disconnect front door key cylinder switch LH.
3. Check continuity between front door key cylinder switch LH con-
nector D14 terminal 2 and body ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.CHECK DOOR KEY CYLINDER SWITCH LH
Check continuity between front door key cylinder switch LH termi-
nals.
OK or NG
OK >> GO TO 4.
NG >> Replace front door key cylinder switch LH. Refer to BL-150
.
4.CHECK DOOR KEY CYLINDER HARNESS
1. Disconnect BCM connector M18.
2. Check continuity between BCM connector (A) M18 terminals 7,
8 and front door key cylinder switch LH connector (B) D14 termi-
nals 1, 3 and body ground.
OK or NG
OK >> Front door key cylinder switch LH circuit is OK.
NG >> Repair or replace harness.
Passenger Select Unlock Relay Circuit Inspection (With Intelligent Key)INFOID:0000000001703972
1.CHECK PASSENGER SELECT UNLOCK RELAY CIRCUIT
NOTE:
Passenger select unlock relay must remain connected during this step.
1. Turn ignition switch OFF.
2. Disconnect BCM and inoperative rear door lock actuator.
Connector Terminals Continuity
D14 2 – Ground Yes
WIIA1248E
Terminals Door key cylinder switch position Continuity
2 – 1 Neutral/Unlock No
Lock Yes
2 – 3Neutral/Lock No
Unlock Yes
WIIA1249E
Connector Terminal Connector Terminal Continuity
A: M187
B: D143Yes
81Yes
7Ground No
8Ground No
WIIA1250E