door lock NISSAN LATIO 2009 Service Owner's Manual

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.

OK >> Replace BCM. Refer to
BCS-18, " Removal and Installa-
tion of BCM " .
NG >> Repair or replace harness.
Front Door Lock Assembly LH (Actuator) Check INFOID:0000000004305002OK >> GO TO 2
NG >> Repair or replace harness.

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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-166, " 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:0000000004305003

OK >> Replace front door lock assembly RH or rear door lock actuator LH/RH. Refer to
BL-166," Removal and Installation " or
BL-169, " Removal and Installation " .
NG >> Replace BCM. Refer to BCS-18, " Removal and Installation of BCM " .
Front Door Key Cylinder Switch LH Check INFOID:0000000004305004CONSULT-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

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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. OK >> GO TO 4
NG >> Replace front door key cylinder switch LH. Refer to BL-166 .
OK >> Front door key cylinder switch LH circuit is OK.
NG >> Repair or replace harness.
Passenger Select Unlock Relay Circ uit Inspection (With Intelligent Key) INFOID:0000000004305005

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2. Check voltage between rear door lock actuator connector LH (A)
D205 or rear door lock actuator connector RH (B) D305 termi-
nals 2 and 3.
3. Check voltage between rear door lock actuator connector LH (A) D205 or rear door lock actuator connector RH (B) D305 termi-
nals 2 and 3.
OK or NG OK >> Replace rear door lock actuator. Refer to
BL-169, " Removal and Installation " .
NG >> Repair or replace harness between actuator and splice. Connector
Terminals
Condition Voltage (V)
(Approx.)
(+) (-)
A: D205 (LH)
B: D305 (RH) 3 2Main power window and
door lock/unlock switch is
turned to LOCK 0
→ Battery voltage

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• through 10A fuse [No. 14, located in the fuse block (J/B)]
• through key switch terminals 2 and 1
• to BCM terminal 37.
When the ignition switch is ACC or ON, power is supplied
• through 10A fuse [No. 20, located in the fuse block (J/B)]
• to BCM terminal 11.
Ground is supplied
• to BCM terminal 67
• through body grounds M57 and M61.
When the front door switch LH is ON (door is OPEN), ground is supplied
• to BCM terminal 47
• through front door switch LH terminal 2
• through front door switch LH case ground.
When the front door switch RH is ON (door is OPEN), ground is supplied
• to BCM terminal 12
• through front door switch RH terminal 2
• through front door switch RH case ground.
When the rear door switch LH is ON (door is OPEN), ground is supplied
• to BCM terminal 48
• through rear door switch LH terminal 1
• through rear door switch LH case ground.
When the rear door switch RH is ON (door is OPEN), ground is supplied
• to BCM meter terminal 13
• through rear door switch RH terminal 1
• through rear door switch RH case ground.
When the back door lock assembly (back door switch) (hat chback) is ON (back door is OPEN), ground is sup-
plied
• to BCM terminal 43
• through back door lock assembly (back door switch) terminals 3 and 4
• through body grounds B117, B132 and D402.
Keyfob signal is inputted to BCM from remote keyless entry receiver.
The remote keyless entry system controls operation of the
• power door lock
• hazard reminder
• auto door lock
• panic alarm
• room lamp
OPERATED PROCEDURE
Power Door Lock Operation BCM receives a LOCK signal from keyfob. BCM lock s all doors with input of LOCK signal from keyfob.
BCM receives a UNLOCK signal from keyfob. BCM unlocks all doors with input of UNLOCK signal from key-
fob.
Hazard and Horn Reminder When the doors are locked or unlocked by keyfob, power is supplied to sound horn and flash hazard warning
lamps as follows
• LOCK operation: 3 or 4 mode (lamps flash twice)
• UNLOCK operation: 2 or 4 mode (lamps flash once)
• Horn sounds once with LOCK function when this feature is set ON.
The hazard reminder has modes 1, 2, 3 or 4. The hor n reminder can be turned ON/OFF with any LOCK mode.
Operating function of hazard reminder
Hazard and horn reminders do not operate if any door switch is ON (any door is OPEN).
How to change hazard and horn reminder modes Mode 1 Mode 2 Mode 3 Mode 4
Keyfob operation Lock Unlock Lock Unlock Lock Unlock Lock Unlock
Hazard warning lamp
flash — — — Twice Once — Once Twice
Horn sound (ON/OFF) ON: once — O N: once — ON: once — ON: once —