2008 NISSAN LATIO relay

AV-22
< SERVICE INFORMATION >
AUDIO
Power Supply Circuit Inspection
INFOID:0000000001704663
1.CHECK FUSE
Check that the following fuses of the subwoofer (premium system) and audio unit are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
3 .
2.AUDIO UNIT POWER SUPPLY CIRCUIT CHECK
1. Disconnect audio unit connector.
2. Check voltage between the audio unit and ground.
OK or NG
OK >> With premium system, GO TO 3.
NG >> • Check connector housings for disconnected or loose
terminals.
• Repair harness or connector.
3.SUBWOOFER (PREMIUM SYSTEM) POWER SUPPLY CIRCUIT CHECK
1. Disconnect subwoofer connector.
Occurrence condition Possible cause
Occurs only when engine is ON.A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed.Ignition components
A whistling noise occurs while the engine speed is
high. A booming noise occurs while the engine is
running and the lighting switch is ON.Generator
Noise only occurs when various
electrical components are oper-
ating.A cracking or snapping sound occurs with the op-
eration of various switches.Relay malfunction, radio malfunction
The noise occurs when various motors are operat-
ing.• Motor case ground
• Motor
The noise occurs constantly, not just under certain conditions.• Rear defogger coil malfunction
• Open circuit in printed heater
A cracking or snapping sound occurs while the vehicle is being driven, especially when
it is vibrating excessively.• Ground wire of body parts.
• Ground due to improper part installation
• Wiring connections or a short circuit
Unit Terminals Signal name Fuse No.
Audio unit19 Battery power 27
7 Ignition switch ACC or ON 20
Subwoofer (with premium audio) 1 Ignition switch ACC or ON 27
UnitTe r m i n a l N o .
OFF ACC ON (+)
(-)
Connector Terminal
Audio unit M4319 GroundBattery
voltageBattery
voltageBattery
voltage
7Ground0VBattery
voltageBattery
voltage
WKIA5345E

BL-1
BODY
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SECTION BL
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CONTENTS
BODY, LOCK & SECURITY SYSTEM
SERVICE INFORMATION ............................4
PRECAUTIONS ...................................................4
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
4
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .....................................
4
Precaution for Procedure without Cowl Top Cover ......5
Precaution for Work ..................................................5
PREPARATION ...................................................6
Special Service Tool .................................................6
Commercial Service Tool ..........................................6
SQUEAK AND RATTLE TROUBLE DIAG-
NOSES ................................................................
7
Work Flow .................................................................7
Generic Squeak and Rattle Troubleshooting ............9
Diagnostic Worksheet .............................................11
HOOD .................................................................13
Fitting Adjustment ...................................................13
Removal and Installation .........................................14
Removal and Installation of Hood Lock Control ......15
Hood Lock Control Inspection .................................17
RADIATOR CORE SUPPORT ...........................19
Removal and Installation .........................................19
FRONT FENDER ................................................21
Removal and Installation .........................................21
POWER DOOR LOCK SYSTEM ........................22
Component Parts and Harness Connector Loca-
tion ..........................................................................
22
System Description .................................................22
CAN Communication System Description ...............24
Schematic ...............................................................25
Wiring Diagram - D/LOCK - .....................................26
Schematic ...............................................................30
Wiring Diagram - D/LOCK - .....................................31
Terminal and Reference Value for BCM ..................35
Work Flow ................................................................35
CONSULT-III Function (BCM) .................................36
Trouble Diagnosis Symptom Chart ..........................37
BCM Power Supply and Ground Circuit ..................37
Door Switch Check (Hatchback) ..............................37
Door Switch Check (Sedan) ....................................40
Key Switch (Insert) Check .......................................41
Door Lock and Unlock Switch Check ......................42
Front Door Lock Assembly LH (Actuator) Check .....45
Door Lock Actuator Check (Front RH and Rear
LH/RH) .....................................................................
46
Front Door Key Cylinder Switch LH Check ..............47
Passenger Select Unlock Relay Circuit Inspection
(With Intelligent Key) ...............................................
48
REMOTE KEYLESS ENTRY SYSTEM .............51
Component Parts and Harness Connector Loca-
tion ...........................................................................
51
System Description ..................................................51
CAN Communication System Description ...............53
Schematic ................................................................54
Wiring Diagram - KEYLES - ....................................55
Terminal and Reference Value for BCM ..................57
How to Perform Trouble Diagnosis ..........................57
Preliminary Check ...................................................58
CONSULT-III Function (BCM) .................................58
Work Flow ................................................................59
Trouble Diagnosis Symptom Chart ..........................60
Keyfob Battery and Function Check ........................61
ACC Switch Check ..................................................62
Door Switch Check (Hatchback) ..............................62
Door Switch Check (Sedan) ....................................65
Key Switch (Insert) Check .......................................66
Hazard Function Check ...........................................67
Horn Function Check ...............................................67
Interior Lamp and Ignition Keyhole Illumination
Function Check ........................................................
68
Remote Keyless Entry Receiver Check ...................68
Keyfob Function (Lock) Check ................................71
Keyfob Function (Unlock) Check .............................71

BL-22
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
POWER DOOR LOCK SYSTEM
Component Parts and Harness Connector LocationINFOID:0000000001703953
System DescriptionINFOID:0000000001703954
Power is supplied at all times
• through 40A fusible link (letter g , located in the fuse and fusible link box)
LIIA2593E
1. BCM M18, M19, M20
(view with glove box removed)2. Intelligent Key unit M52
(if equipped)3. Front door key cylinder switch LH D14
4. Front door switch LH B8, RH B108 5. Front door lock actuator LH D3, RH D114 6. Rear door switch LH B6, RH B116
7. Rear door lock actuator LH D205,
RH D3058. Key switch and ignition knob switch M73
(with Intelligent Key)9. Key switch and key lock solenoid M27
(without Intelligent key)
10. Main power window and door lock/
unlock switch D7, D8
Power window and door lock/unlock
switch RH D10511. Fuse block (with Intelligent Key)
(view with instrument panel LH removed)12. Passenger select unlock relay M2
(with Intelligent Key)
13. Back door lock assembly (back door
switch) D405 (hatchback view with
back door open)

POWER DOOR LOCK SYSTEM
BL-37
< SERVICE INFORMATION >
C
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Trouble Diagnosis Symptom ChartINFOID:0000000001703963
BCM Power Supply and Ground CircuitINFOID:0000000001703964
Refer to BCS-15, "BCM Power Supply and Ground Circuit Inspection" .
Door Switch Check (Hatchback)INFOID:0000000001703965
1.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-36, "
CONSULT-III Function (BCM)" .
• When doors are open:
• When doors are closed:
Test item Content
ALL LOCKThis test is able to check all door lock actuators lock operation. These actuators lock when "ON"
on CONSULT–III screen is touched.
ALL UNLOCKThis test is able to check all door lock actuators unlock operation. These actuators unlock when
"ON" on CONSULT–III screen is touched.
DR UNLOCKThis test is able to check front door lock actuator LH unlock operation.These actuators lock
when "ON" on CONSULT–III screen is touched.
OTHER UNLOCKThis 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 checkBCS-15
2. Door switch check (hatchback)BL-37
3. Door switch check (sedan)BL-40
4. Key switch (insert) checkBL-41
5. Replace BCM.BCS-18
Power 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 RH1. Door lock/unlock switch checkBL-42
2. Replace BCM.BCS-18
One or both rear door lock actuators do not operate. 1. Passenger select unlock relay circuit checkBL-48
Front door lock assembly LH (actuator) does not operate. 1. Front door lock assembly LH (actuator) checkBL-45
Specific door lock actuator does not operate. 1. Door lock actuator check (Front RH, Rear LH/RH)BL-46
Power door lock does not operate with front door key cyl-
inder switch operation.1. Front door key cylinder switch checkBL-47
2. Replace BCM.BCS-18
All power door locks do not operate.1. BCM power supply and ground circuit checkBCS-152. Door lock/unlock switch checkBL-42
3. Replace BCM.BCS-18
DOOR SW-DR : ON
DOOR SW-AS : ON
DOOR SW-RL : ON
DOOR SW-RR : ON
BACK DOOR SW : ON

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 >
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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

POWER DOOR LOCK SYSTEM
BL-49
< SERVICE INFORMATION >
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3. Check continuity between BCM connector (A) M20 terminal 65
and rear door lock actuator LH connector (B) D205 terminal 3 or
rear door lock actuator RH connector (C) D305 Terminal 3.
4. Check continuity between BCM connector M20 terminal 65 and
body ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2.CHECK PASSENGER SELECT UNLOCK RELAY INPUT
1. Disconnect passenger select unlock relay.
2. Check continuity between BCM connector (A) M20 terminal 65
and passenger select unlock relay connector (B) M2 terminal 3.
3. Check continuity between BCM connector (A) M20 terminal 65
and body ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between BCM and relay.
3.CHECK PASSENGER SELECT UNLOCK RELAY OUTPUT
1. Disconnect inoperative rear door lock actuator.
2. Check continuity between passenger select unlock relay con-
nector (A) M2 terminal 4 and rear door lock actuator LH connec-
tor (B) D205 or rear door lock actuator RH connector (C) D305
terminal 3.
3. Check continuity between passenger select unlock relay con-
nector (A) M2 terminal 4 and ground.
OK or NG
OK >> Replace passenger select unlock relay.
NG >> Repair or replace harness between relay and actuator.
4.CHECK REAR DOOR LOCK ACTUATOR ASSEMBLY
1. Reconnect BCM.65 - 3 : Continuity should exist.
65 - Ground : Continuity should not exist.
WIIA1164E
65 - 3 : Continuity should exist.
65 - Ground : Continuity should not exist.
WIIA1165E
4 - 3 : Continuity should exist.
4 - Ground : Continuity should not exist.
WIIA1166E